Network Infrastructure and DNS Concepts Quiz

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which DNS record should be used to alias newapplication.comptia.org to www.comptia.org?

CNAME (correct)

SOA

What is the main benefit of implementing enterprise authentication on a wireless network?

No need for user identification

Shared access for all users

Automatic connection to any network

Unique credentials for user traceability (correct)

Which DNS record type is associated with defining mail server records?

SOA

CNAME

MX (correct)

What role does an SOA record play in DNS?

It provides zone information for the DNS. Signup and view all the answers

Which setup allows for efficient user identification on a wireless network?

Implementing enterprise authentication Signup and view all the answers

Which of the following is NOT a benefit of using a CNAME record?

Boosting website loading speed Signup and view all the answers

What type of record allows for specifying authoritative DNS servers?

NS Signup and view all the answers

If a network administrator wants a backup route without dynamic routing, what feature could be chosen?

Manual static routes Signup and view all the answers

What is the primary purpose of deploying edge devices in SD-WAN solutions?

To allow for dynamic routing and management of traffic Signup and view all the answers

Which troubleshooting step is crucial for reducing interference in Cat 8 cabling?

Checking that all end connections are properly wrapped in copper tape Signup and view all the answers

What is the main consequence of improperly terminating Cat 8 cables?

Higher interference and potential data loss Signup and view all the answers

Which of the following practices is NOT related to troubleshooting interference in high-frequency cabling?

Using passthrough modular crimping plugs Signup and view all the answers

Which of these factors is least likely to influence the physical size of a rack for installation?

Cooling fan speed Signup and view all the answers

In the context of SD-WAN, what role does a central controller play?

It coordinates the configuration of edge devices Signup and view all the answers

Which of the following statements is true regarding the use of copper tape with Cat 8 cabling?

Copper tape serves to maintain shielding and reduce interference. Signup and view all the answers

What could be a potential effect of connecting RX/TX wires to different pins during Cat 8 cabling installation?

No connection or incorrect data transmission Signup and view all the answers

What default bridge priority value should a network administrator verify when deploying a new switch?

32768 Signup and view all the answers

Which command can a network administrator use to verify the bridge priority on a switch?

show spanning-tree Signup and view all the answers

What action should a technician take to confirm a theory during the troubleshooting process?

Duplicate the problem Signup and view all the answers

Which value indicates a higher preference for bridge priority than the default?

8192 Signup and view all the answers

What is the primary purpose of duplicating the problem in troubleshooting?

Verify that the identified cause leads to the observed issue Signup and view all the answers

If users report network outages after a new DHCP server installation, which is likely the issue?

Misconfigured default gateway Signup and view all the answers

Which of the following steps is a part of the information-gathering phase in troubleshooting?

Identifying symptoms Signup and view all the answers

What would 36684 indicate when observed as a bridge priority value?

Non-standard value due to specific changes Signup and view all the answers

What issue arises if a DHCP server does not provision enough IP addresses?

Devices may fail to obtain an IP address, causing connectivity issues. Signup and view all the answers

Which network topology features a direct connection between every node?

Mesh Signup and view all the answers

What is the primary benefit of using an Extended Service Set Identifier (ESSID)?

It enables seamless roaming between access points for users. Signup and view all the answers

What should be implemented to comply with a cease-and-desist order regarding torrent activity?

Content filtering Signup and view all the answers

Which subnet mask should a network administrator use to divide 192.168.1.0 into two equal parts?

255.255.255.128 Signup and view all the answers

To connect two Layer 2 switches capable of transferring data across multiple networks, which method should be utilized?

802.1Q tagging Signup and view all the answers

Which option represents the proper multicast IP address range?

224.0.0.0 to 239.255.255.255 Signup and view all the answers

Which characteristic of mesh topology provides high reliability?

Multiple paths for data increase redundancy. Signup and view all the answers

What is one of the main applications for multicast IP addressing?

One-to-many or many-to-many communication. Signup and view all the answers

In what scenario would content filtering be particularly beneficial for a company?

To prevent access to malicious websites. Signup and view all the answers

What happens if the network administrator uses a subnet mask of 255.255.0.0 for 192.168.1.0?

It encompasses a much larger network than intended. Signup and view all the answers

What happens to devices when the DHCP pool is exhausted?

New devices or renewing devices fail to obtain an IP address. Signup and view all the answers

How many usable IP addresses are available in each subnet when dividing 192.168.1.0 using a mask of 255.255.255.128?

126 usable IP addresses. Signup and view all the answers

What does 802.1Q tagging help to achieve in a network?

Separation of VLAN traffic over trunk links. Signup and view all the answers

What would be the consequence of maintaining the original subnet size with a mask of 255.255.255.0?

It creates only one large network segment. Signup and view all the answers

What is a key characteristic of the multicast IP address 224.0.0.0?

It designates the start of the multicast address range. Signup and view all the answers

What command specifies the VLAN ID on the interface GigabitEthernet0/0.20?

encapsulation dot1Q 20 Signup and view all the answers

Which device is least likely to use subinterfaces?

A hub utilizing jumbo frames Signup and view all the answers

In the troubleshooting methodology, which step comes directly after establishing a theory?

Test the theory to determine cause Signup and view all the answers

What is a primary advantage of using subinterfaces in routing?

They allow multiple networks on a single interface. Signup and view all the answers

Which of the following actions is crucial after implementing a solution during troubleshooting?

Verify functionality Signup and view all the answers

When checking through each level of the OSI model during troubleshooting, in which step should this action occur?

Verify functionality Signup and view all the answers

The encapsulation command is most critical for which networking task?

VLAN tagging on subinterfaces Signup and view all the answers

In network troubleshooting methodology, which step follows verifying functionality?

Document findings Signup and view all the answers

Study Notes

CompTIA N10-009 Practice Test

Exam Code: N10-009
Title: CompTIA Network+
Focus: This practice test covers various networking concepts, including troubleshooting, security, and networking technologies.

Question 1

Scenario: A user cannot access network resources. Ethernet is properly connected, but the network interface lights aren't blinking.
Most Likely Cause: Administrative switch port is shut down

Question 2

Topic: MIB (Management Information Base)
Description: A MIB is a definition file for managing network devices using SNMP, used to monitor networks.

Question 3

Topic: Confidentiality with Data at Rest
Description: Confidentiality ensures only authorized individuals can access stored data. It's achieved via encryption, access controls, and permissions.

Question 4

Topic: DNS Propagation and TTL
Description: Changing MX records in DNS can take time to propagate due to Time To Live (TTL) values. Reducing TTL values speeds up propagation.

Question 5

Topic: IPsec Protocols (ESP)
Description: Encapsulating Security Payload (ESP) encrypts the entire IP packet, providing confidentiality. (Other protocols like AH provide either integrity or authentication, but do not encrypt.)

Question 6

Topic: Wireless Interference Mitigation
Description: To mitigate interference in the 2.4GHz band, use the 5GHz frequency band, which generally has less interference, and use non-overlapping channels (1, 6, and 11).

Question 7

Topic: Disaster Recovery Metrics
Description: Recovery Point Objective (RPO) defines the maximum acceptable amount of data loss in the event of a disaster, measured in time, or in terms of the last backup taken.

Question 8

Topic: Jumbo Frames
Description: Switches, not access points, bridges, or hubs, can support jumbo frames, which are larger Ethernet frames used to optimize performance for network loads.

Question 9

Topic: Wireless Network Coverage Visualization
Description: Heat maps graphically represent the signal strength for wireless devices to help identify areas of good or poor coverage in a building.

Question 10

Topic: Hosts File and DNS Resolution
Description: The hosts file (typically located in C:\Windows\System32\drivers\etc\hosts) can override DNS resolution, leading to incorrect IP address mappings for a specific user on a machine, whereas other users who consult DNS may not have this issue.

Question 11

Topic: SD-WAN
Description: SD-WAN is a cost-effective technology for connecting multiple sites in a mesh network quickly and easily, due to the ability to manage it centrally.

Question 12

Topic: Cat 8 Cabling Interference
Description: Ensuring proper termination techniques, like wrapping the end connections in copper tape, is needed to reduce interference issues with high-frequency cables like Cat 8.

Question 13

Topic: Rack Size Determination
Description: The rack size is determined by the depth and height of the equipment to be housed within it, which is determined by the switch depth and physical dimensions of servers.

Question 14

Topic: VoIP and VLANs
Description: To ensure proper VoIP phone functionality, the switch port must be configured to tag the voice traffic, ensuring that it's correctly separated in a VLAN and given priority, making it different than regular data traffic.

Question 15

Topic: MAC Flooding Attacks
Description: MAC flooding attacks overwhelm the CAM table on a switch by sending numerous fake MAC addresses, causing it to operate as a hub and potentially allowing others to eavesdrop on communications.

Question 16

Topic: Security Information and Event Management (SIEM) and Time Synchronization
Description: NTP (Network Time Protocol) synchronizes network device clocks enabling accurate correlation of events and logs for SIEM systems.

Question 17

Topic: IPsec
Description: Encapsulating Security Payload (ESP) provides confidentiality within an IPsec VPN configuration for secure site-to-site communication.

Question 18

Topic: Routing Protocols and Autonomous Systems
Description: BGP (Border Gateway Protocol) operates across autonomous systems, requiring an AS number to exchange routing information across multiple ISPs (Internet Service Providers).

Question 19

Topic: Site-to-Site VPN Security
Description: IPsec provides the most secure site-to-site VPN connection due to its multiple security features, such as data integrity, authentication, encryption, and end-to-end security.

Question 20

Topic: Subnetting
Description: A subnet of 255.255.255.240 provides 16 IP addresses, but only 14 usable addresses are available. A router interface configured with a broadcast address is logically incorrect.

Question 21

Topic: Cloud Deployment Models
Description: A hybrid cloud deployment model is recommended for the scenario described combining both public and private cloud environments within a business, maintaining critical systems and services locally while using cloud resources for certain tasks.

Question 22

Topic: Routing Troubleshooting
Description: Tracert (traceroute) is a command-line tool for identifying the path taken by network packets to determine if issues lie within the routing structure rather than any other part of the network connection.

Question 23

Topic: Fiber Connectors and NICs
Description: LC connectors are the most common choice for use on network interface cards (NICs) due to their compact size design and suitable for high-density environments.

Question 24

Topic: Router Firmware Updates
Description: Updating the firmware, which is the low-level software that manages the router's hardware, is the best strategy for mitigating a router CPU vulnerability reported by a vendor.

Question 25

Topic: Automatic Private IP Addressing (APIPA)
Description: A virtual machine assigned an APIPA address within a private IP address range (169.254.x.x) can communicate within the local network but not to external addresses on the internet.

Question 26

Topic: Network Diagnostic Tools
Description: Tracert (traceroute) is a command-line utility to trace the route packets take between devices, helping identify the particular internet link utilized for a web application.

Question 27

Topic: Subnetting and Router Interfaces
Description: Configuring a router interface with a broadcast address (e.g., 10.0.0.95) for the subnet 10.0.0.80 creates misrouting problems as it's not a valid host address.

Question 28

Topic: VPN Configurations
Description: A full tunnel VPN routes all network traffic through the VPN, enabling comprehensive inspection of all network traffic by the company.

Question 29

Topic: Fiber Optic Cable Troubleshooting
Description: Reversing the fibers is the first step in troubleshooting connections due to the possibility of incorrect fiber placement.

Question 30

Topic: Routing Protocols and Administrative Distances
Description: EIGRP (Enhanced Interior Gateway Routing Protocol) has a default administrative distance of 90 for routing information originating from within the same network.

Question 31

Topic: VPN Configurations
Description: A split-tunnel VPN is cost-effective as it routes only certain traffic through the VPN, saving bandwidth and thus decreasing overall costs.

Question 32

Topic: Wireless Network Authentication
Description: RADIUS (Remote Authentication Dial-In User Service) provides centralized authentication and authorization for wireless and wired network access.

Question 33

Topic: GDPR and Data Protection
Description: GDPR (General Data Protection Regulation) is the primary EU law governing data protection and privacy regulations, establishing the fundamental rights for individuals over their personal data.

Question 34

Topic: Network Diagnostics with Traceroute
Description: The tracert command traces the route packets take to reach a destination, showing the intermediate routers and possible points of failure.

Question 35

Topic: Rogue DHCP Server Attacks
Description: Rogue DHCP servers can assign duplicate IP addresses on a network, leading to conflicts.

Question 36

Topic: Spanning Tree Protocol and Bridge Priority
Description: The default bridge priority on most switches is 32768.

Question 37

Topic: Troubleshooting Methodology
Description: To confirm a troubleshooting theory, duplicate the problem in a controlled environment to ensure the assumed cause is truly the cause.

Question 38

Topic: DHCP and Network Outages
Description: Insufficient IP addresses in the DHCP server scope can trigger network outages as devices are unable to receive IP addresses.

Question 39

Topic: Network Topologies
Description: A mesh topology directly connects every node to every other node on the network.

Question 40

Topic: Network Security and Compliance
Description: Content filtering policies from the ISP should block or restrict access to websites and services involved in torrenting and other unauthorized online activities.

Question 41

Topic: VLAN Tagging
Description: 802.1Q tagging is necessary to identify traffic on a network trunk to help ensure segmentation of multiple networks traversing a single physical connection.

Question 42

Topic: Troubleshooting Web Server Access
Description: Using netstat on the server will display network connections, including whether the web server is listening on the expected port.

Question 43

Topic: Layer 3 Switches
Description: Layer 3 switches can operate at multiple OSI layers, handling functions traditionally assigned to other devices.

Question 44

Topic: End-of-Support Device Management
Description: A crucial step after a device is end-of-support is to replace the hardware with a fully supported device.

Question 45

Topic: Troubleshooting Methodology
Description: After confirming a root cause theory, the next step in the troubleshooting process is to implement the solution to fix or address the problem.

Question 46

Topic: Access Points (APs)
Description: Access points (APs) are responsible for translating wireless signals into electronic signals that the wired portion of the network can comprehend.

Question 47

Topic: Switch Console Access
Description: RJ45 connectors are commonly used for wired console connections, enabling access to a switch for configuring and managing it.

Question 48

Topic: Port-Based Network Access Control (PNAC)
Description: 802.1X is a port-based network access control (PNAC) protocol. It's used to authenticate devices seeking to connect, whether wired or wireless.

Question 49

Topic: DNS Poisoning Attacks
Description: DNS poisoning redirects users to malicious websites by manipulating DNS records and causing the target to connect to a fake, malicious server.

Question 50

Topic: Network Segmentation for OT Devices
Description: Network segmentation is crucial when setting up OT (Operational Technology) devices to safeguard them from potential threats.

Question 51

Topic: Environmental Factors in Equipment Installation
Description: Fire suppression and humidity control in data centers are crucial for preventing damage or failure to equipment due to environment-related vulnerabilities.

Question 52

Topic: Wireless Network Coverage and Roaming
Description: An Extended Service Set Identifier (ESSID) in a wireless environment enables seamless roaming between multiple access points, whereas a Service Set Identifier (SSID) typically only allows connection to a single access point.

Question 53

Topic: Subnetting
Description: For splitting an existing subnet into two equal halves, borrow a bit from the host portion of the IP address, which will adjust the subnet mask to 255.255.255.128).

Question 54

Topic: IP Addressing and Multicasting
Description: The IP address range 224.0.0.0 to 239.255.255.255 is specifically reserved for multicast traffic, which is well-suited for one-to-many communication across a network, such as audio and video broadcasting.

Question 55

Topic: Link Aggregation and High-Bandwidth Utilization
Description: Link aggregation, or bonding (often referred to as LACP), bundles multiple physical links into a single logical link to increase the overall throughput and increase bandwidth utilization.

Question 56

Topic: Reliability and Maintenance Metrics
Description: MTBF (Mean Time Between Failures) is a metric used to estimate the average operational time between failures, which is useful for calculating the overall system reliability and anticipated lifespan.

Question 57

Topic: Network Security Zones
Description: ACLs (Access Control Lists) are used to control network traffic and restrict access based on different criteria, such as IP addresses or ports.

Question 58

Topic: SNMP Security
Description: SNMPv3 encrypts traffic, unlike earlier versions, thus protecting the confidentiality of data and providing authentication for a more secure network access.

Question 59

Topic: Troubleshooting Network Cables (Cross-Talk)
Description: Checking for any wires that are touching or exposed within the connectors is the first step for troubleshooting cross-talk.

Question 60

Topic: Network Topologies for Public Safety
Description: A mesh (or distributed) network topology improves reliability and ensures continuous operation for a more mobile-style network environment, such as in public safety.

Question 61

Topic: Passive IDS Implementation
Description: Port mirroring (SPAN) copies network traffic from one switch port to another for monitoring by an IDS (Intrusion Detection System) without impacting regular communications.

Question 62

Topic: Out-of-Band Management
Description: Out-of-band (OOB) management utilizes a separate network and IP addressing scheme for managing network devices, even when regular network connectivity is compromised. This is to prevent issues from impacting regular network operations.

Question 63

Topic: Direct Connect Cloud Services
Description: Direct Connect is a dedicated, private connection from on-premises infrastructure to a cloud environment; it may not have encryption as a core functionality.

Question 64

Topic: Secure Shell Protocol
Description: SSH is a protocol used for remote access, utilizing port 22 to provide secure connections using encryption.

Question 65

Topic: VLAN Hopping Attacks
Description: VLAN hopping attackers exploit vulnerabilities by crafting packets containing multiple VLAN tags through improper network segmentation, bypassing security features and gaining access to otherwise restricted network segments.

Question 66

Topic: Routing Protocols and ISP Exchange
Description: BGP (Border Gateway Protocol) is used for exchanging routing information between different ISPs, enabling the routing of data between autonomous systems, making it relevant for multinational or multi-ISP network environments.

Question 67

Topic: DNS Records for Aliases
Description: CNAME (Canonical Name) records in DNS act as aliases assigning a domain name to another domain name, which may use the same IP address.

Question 68

Topic: Wireless Network Authentication
Description: Implementing enterprise authentication, by using a method like WPA2-Enterprise protocol, provides traceable network connections that can help fortify network security.

Question 69

Topic: Static Routes and Backup Routing
Description: Administrative distance in routing allows the establishment of a backup route by having the backup route be prioritized less than the preferred route.

Question 70

Topic: OSI Model and Application Layer
Description: The application layer relies on lower layers for packet delivery and other underlying functions, whereas it does not directly handle packet loss, encryption or address translation.

Question 71

Topic: Subinterfaces and Network Configuration
Description: Subinterfaces are often used on routers with limited physical ports to support multiple VLANs or networks on a single physical interface.

Question 72

Topic: Troubleshooting Methodology and OSI Model
Description: Verifying functionality in troubleshooting involves a comprehensive test across all layers of the OSI model to ensure the intended function is realized and the problem is completely resolved.

Question 73

Topic: Network Security Zones
Description: A trusted zone is appropriate for containing sensitive organizational resources, access to which is restricted to authorized personnel.

Question 74

Topic: Disaster Recovery Metrics
Description: MTBF (Mean Time Between Failures) is a metric calculated by dividing the total operational hours by the total number of failures.

Question 75

Topic: Network Configuration and Security
Description: This question requires the student to configure network devices in a realistic office environment accommodating desktops in Building A, laptops in Building B, and a wireless connection between the buildings.

Question 78

Topic: Wireless Network Configuration
Description: Configuring three access points (APs) and a switch in a wireless network requires careful consideration of SSID, security, channel assignment, and client support for appropriate performance in a dense environment.

Question 79

Topic: Network Subnetting
Description: Subnetting, which is dividing the network into smaller subnets and assigning the appropriate subnet masks and IP addresses, is a necessary networking configuration to accommodate the required number of users and devices in each department.

Question 80

Topic: Network Discovery and Troubleshooting
Description: This task requires the technician to use network discovery commands to obtain device information, especially in an environment where equipment and cabling may have been displaced.

Question 81

Topic: Network Device Failure Troubleshooting
Description: Troubleshoot the described scenario by accessing the configurations for each device and network component to identify misconfigurations or faulty components affecting device connectivity.

Question 82

Topic: Network Cable and Device Troubleshooting
Description: This task requires a systemic investigation of the described network scenario to diagnose device connections and identify the cause of the device connectivity issues by ensuring that equipment and device connections meet the requirement specified.

Question 83

Topic: WAN Station Selection
Description: Determining the preferred WAN station for VoIP traffic involves evaluating latency, throughput, and loss metrics. Analyze characteristics and make a decision which WAN station offers the best performance for the specific requirements in the organization.

Question 84

Topic: Network Access Control Lists Configuration
Description: Implementing ACLs (Access Control Lists) on a network to control authorized access to specific network segments and allow various traffic types to access various resources while minimizing or blocking certain types of network traffic types.

Question 85

Topic: Wireless Channel Selection
Description: Using 20MHz channel width in a dense wireless environment is the most appropriate method due to reduced overlaps from other devices in a crowded network space when broadcasting or receiving signals; utilizing a smaller channel width is ideal for environments to accommodate more users.

Question 86

Topic: Cloud Service Models and Costs
Description: IaaS (Infrastructure as a Service) typically carries the greatest initial expense for migrating a data center to a cloud-based setup due to the requirement of investing large up-front costs for hardware and infrastructure maintenance.

Question 87

Topic: Troubleshooting Methodology
Description: Checking the logs for recent changes is a critical step in the troubleshooting process that helps determine the exact cause of any observed networking problem.

Question 88

Topic: Cloud Networking Concepts
Description: VPC (Virtual Private Cloud) segments compute resources within a cloud environment, enabling better control over network resources and improved security via isolating different parts of the corporate network.

Question 89

Topic: Remote Access Technology
Description: The described scenario involves the use of a clientless VPN, which enables secure remote access to applications like financial systems via a web browser without requiring a separate VPN client.

Question 90

Topic: IDS Placement and Latency
Description: Using a network tap or port mirror for implementation of an IDS is the best solution to ensure the IDS passively views all the network packets and will not impact or add latency to normal network traffic.

Question 91

Topic: Network Patch Panels
Description: Patch panels facilitate a central location of the network cables for better organization in a network environment, and are useful aids when troubleshooting network problems or reconfiguring a network setup.

Question 92

Topic: Subnetting for IP Addresses
Description: A subnet mask of 255.255.255.240 ( /28 ) is the correct choice because it will generate exactly sixteen IP addresses, which is more than enough to utilize six usable addresses for a smaller network environment.

Question 93

Topic: Port Security
Description: Enabling port security on a switch restricts port access to only pre-configured devices via MAC addresses.

Question 94

Topic: Multicast Addresses
Description: The IP address range 224.0.0.0 to 239.255.255.255 is specifically reserved for multicast addresses, ideal for applications that require one-to-many or many-to-many communications.

Question 95

Topic: Content Filtering for DLP
Description: Content filtering policies are the best option for implementing data loss prevention (DLP) to restrict user access by blocking access to specific content, such as social media or personal cloud storage locations.

Question 96

Topic: Wireless Interference
Description: Excessive wireless reflections in an office environment lead to significant signal degradations and network drops; this is the most likely reason.

Question 97

Topic: Network Device Discovery
Description: For discovering the precise connections on a switch and the port used, LLDP (Link Layer Discovery Protocol) is the appropriate tool.

Question 98

Topic: Captive Portal
Description: A captive portal is a web-based interface used to enforce terms of use or authenticate users before granting them network access.

Question 99

Topic: Network Hierarchy
Description: Access, distribution, and core layers form the foundational and ideal design in a network hierarchy for data center designs to help determine the network's intended functionality and how different parts of the network connect to each other.

Question 100

Topic: Network Access Permissions
Description: Least privilege network access (or least privilege principle) limits network access to only allow users the minimum amount of access necessary to perform their job. Implementing least privilege access reduces the risk of data breaches from accidental actions.

Question 101

Topic: Honeynets and Security Testing
Description: Honeynets are decoy systems that attract and study attackers, helping organizations assess and improve their security practices.

Question 102

Topic: Wiring Identification
Description: Toner and probe tools are the best tools for locating specific cables within a patch panel or IDF (Intermediate Distribution Frame) setup, with the most efficient and readily available approach to quickly label cables.

Question 103

Topic: Cloud Application Deployment
Description: Multitenancy is a common cloud hosting practice where a single application or platform is used by multiple users.

Question 104

Topic: Transport Layer Protocols
Description: Datagrams are what is used for connectionless transmission across a network, and are used in the transport layer in network communication.

Question 105

Topic: PoE and Device Power Limitations
Description: Exceeding the PoE budget may cause issues and intermittent reboots for devices like VoIP handsets if not enough power is allocated.

Question 106

Topic: Device Hardening Techniques
Description: Disabling unused ports decreases the attack surface by removing unused access points or ports from unauthorized connection, and changing default passwords helps to strengthen the basic security of systems and devices.

Question 107

Topic: Fiber Optic Cable Types
Description: Multimode fiber optic cables transmit light by reflecting it off the cladding, unlike single-mode fiber, which transmits light without reflection.

Question 108

Topic: Cable Compatibility and Network Connectivity
Description: Performing a sanity check is critical to ensure cable compatibility with the server's new Network Interface Card (NIC); the incorrect cable type can cause network issues after upgrades.

Question 109

Topic: VPN Configurations
Description: Split-tunnel VPNs reduce costs and improve efficiency by routing only required traffic through the VPN, minimizing unnecessary utilization of the company network.

Question 110

Topic: Patch Panel Wiring Troubleshooting
Description: A toner probe locates individual cables in the patch panel, providing a quick and accurate way for determining the associated jack for each cable in an unlabeled patch panel.

Question 111

Topic: PoE Power Budget and Device Functionality
Description: Camera failure is most likely due to exceeding PoE power budget, which may result from cabling or equipment not meeting the requirement of the particular networking standard for power.

Question 112

Topic: Network Traffic Types
Description: Broadcast traffic is sent to all devices within a particular network segment or broadcast domain. This is in contrast to unicast (to a single device), multicast (to multiple specific receivers), and anycast (to one of many potential destinations) traffic.

Question 113

Topic: Network Security Enhancements
Description: Implementing least privilege and central policy management are cost-effective approaches that enhance security and help to strengthen the overall robustness and security of the network infrastructure.

Question 114

Topic: Coaxial Modem Signal Problems
Description: Removing any splitters or other signal degradation sources from the incoming coaxial line is the best immediate step for troubleshooting intermittent connection problems and slower speeds with access to a network.

Question 115

Topic: Disaster Recovery Site Types
Description: A warm site in a disaster recovery scenario provides a partially-equipped infrastructure with data retrieval capabilities within hours.

Question 116

Topic: Remote File Server Access
Description: Using nmap is the most practical approach for identifying open ports on a remote file server to help pinpoint communication issues. nmap is a network scanning tool.

Question 117

Topic: Data Center Ventilation
Description: Equipment in a hot aisle/cold aisle data center should exhaust hot air out the rear of the rack to maintain proper cooling airflow and minimize potential over-heating issues/compromise.

Question 118

Topic: Public Key Infrastructure (PKI)
Description: X.509 certificates are commonly utilized to authenticate and sign transactions with PKI in network security.

Question 119

Topic: Web Server Security and Ports
Description: Disabling port 80, the HTTP port, is a common method to improve security in a web server configuration by forcing users to utilize the higher-security standard of HTTPS (port 443) when communicating with the server.

Question 120

Topic: Device Monitoring and Security
Description: SNMPv3 (Simple Network Management Protocol version 3) provides secure device monitoring that incorporates authentication and encryption for enhancing the visibility and security of a network by ensuring secure transmission of monitoring data.

Question 121

Topic: DNS Record Management
Description: NS (Name Server) records specify the servers that are authoritative for a domain. Modifying NS records changes the location where DNS queries for the specific domain are directed to a new host.

Question 122

Topic: Secure Email Protocols and Ports
Description: Port 587 is used for secure email submission (SMTP) with encryption enhancements, whereas ports associated with non-secure methods may run into problems due to spam or security issues.

Question 123

Topic: Wireless Network Standards in High-Density Environments
Description: Using 802.11ax enhances network communication in high-density wireless environments due to its advanced features like OFDMA, MU-MIMO, and BSS Coloring, resulting in a more robust wireless network.

Question 124

Topic: Network Devices and Wireless Coverage
Description: Access points extend the coverage of wireless networks, enabling multiple devices to connect from a wider range.

Question 125

Topic: XML-Based Authentication and Authorization
Description: SAML (Security Assertion Markup Language) is an XML-based protocol for secure exchange of user attributes and credentials between an identity provider (IdP) and a service provider (SP) to facilitate web-based authentication.

Question 126

Topic: SVI (Switched Virtual Interface)
Description: An SVI (Switched Virtual Interface) is a logical interface that can be created on a Layer 3-capable switch to route traffic between VLANs, thereby enabling different VLAN network segments to communicate efficiently as opposed to using a physical interface.

Question 127

Topic: Jumbo Frames in Storage Networks
Description: Configuring jumbo frames on a network enhances data transfer efficiency in storage networks.

Question 128

Topic: Network Access Control
Description: 802.1x is used for network access control, requiring devices to authenticate before accessing the network. This is often used for guest or less secure network segments.

Question 129

Topic: VPN Usage and Data Encryption
Description: VPN uses encryption, ensuring sensitive data that is transmitted in transit is protected and secured from an insecure network by utilizing a virtual private network (VPN).

Question 130

Topic: STP (Spanning Tree Protocol)
Description: In a Spanning Tree Protocol configuration, if the port costs on either switch are the same, a root bridge needs to be designated to break the potential cycle in network traffic.

Question 131

Topic: Warm Site Disaster Recovery
Description: A warm site provides a partially equipped infrastructure, including software and infrastructure, for the quicker restoration of some operational capabilities when compared to a full-infrastructure hot site.

Question 132

Topic: Data Security Principles
Description: Data integrity protects organizational data, and ensures the prevention of unauthorized modification, while the accidental deletion of customer data has an impact on the availability of data.

Question 133

Topic: Disaster Recovery Metrics
Description: MTTR (Mean Time To Repair) is the average time it takes to repair or restore functionality following a network or system outage.

Question 134

Topic: Network Cable Troubleshooting
Description: A cable tester is the best tool to diagnose problems within the physical cable, such as breaks in the wire or improper termination.

Question 135

Topic: Post-Disaster Network Troubleshooting
Description: Using the wrong type of cable after a fire can cause the network to perform slower and less efficiently due to damaged equipment or connections and require an inspection to determine the proper wiring needed or transceiver.

Question 136

Topic: Troubleshooting Methodology
Description: Verifying system functionality is the next step after implementing a solution or preventive measures in the troubleshooting methodology.

Question 137

Topic: DNS Records and Email Verification
Description: TXT records are frequently used to hold details that are intended to help verify the source or origin of an email (such as SPF and DKIM records).

Question 138

Topic: VLAN Configuration on Access Ports
A network switch assigned to a specific port or access point frequently requires specific VLAN assignments for various traffic types, such as a voice VLAN, to help determine how various traffic types should be separated and prioritized, and it may also include a default VLAN.

Question 139

Topic: Network Address Translation (NAT)
Description: NAT can provide a security benefit by hiding internal network IP addresses from external users, making it more difficult to target internal network resources.

Question 140

Topic: Device Hardening and Security Best Practices
Description: Fortifying a device before adding it to the network typically begins with changing default passwords to protect the system from unauthorized access or potential data breaches; this is critical for network security.

Question 141

Topic: Temporary Network Access
Description: A captive portal is a web-based interface used to enforce terms of use, often in guest networks or areas requiring temporary network access, which helps verify if the users agree with any terms specified by the organization.

Question 142

Topic: File Server Configuration with DHCP
Description: Setting up a file server reservation based on its MAC address in a DHCP-based network environment is useful, preventing IP address changes/conflicts.

Question 143

Topic: Network Access Control
Description: Network Access Control (NAC) would be the most suitable solution to limit network access for visitors to commonly designated network access for guests to help limit unauthorized access, whether wired or wireless.

Question 144

Topic: Remote Network Appliance Access
Description: Remote access via out-of-band (OOB) management provides administrative access to devices and network equipment that have experienced malfunctions or unexpected behavior/errors. OOB channels commonly leverage secure protocols for security.

Question 145

Topic: Load Balancers
Description: Load balancers are network devices that distribute incoming requests across multiple servers to handle the traffic load, which would allow for a higher volume and more equitable distribution of network traffic among various servers.

Question 146

Topic: Redundancy in Network Switching
Description: Using link aggregation (or bonding) bonds multiple ports, improving redundancy and fault tolerance for enhanced network performance, and preventing single points of failure.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Test your knowledge on key concepts of network infrastructure and DNS management. This quiz covers essential topics such as DNS record types, enterprise authentication, and SD-WAN. Challenge yourself with questions on troubleshooting and best practices within networking.