Network Security Protocols Quiz

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the primary function of IKE in secure communications?

To set up a secure, authenticated communications channel (correct)

To encrypt data during transmission

To manage the routing of data packets

To provide data integrity for IP packets

Which protocol provides IP packet integrity and authentication without encrypting the payload?

TCP

ESP

AH (correct)

L2TP

What is the role of BGP in network communications?

To exchange routing information between different autonomous systems (correct)

To manage point-to-point connections

To encrypt data passed through the Internet

To provide IP address assignment

Which protocol is considered the most secure for site-to-site connectivity?

IPsec Signup and view all the answers

What is a significant benefit of using a subnet mask in a point-to-point router connection?

It conserves IP space by allocating minimal addresses Signup and view all the answers

Which of the following routing protocols is designed to provide internal routing within an autonomous system?

OSPF Signup and view all the answers

Which protocol uses an authentication mechanism but does not offer encryption features?

AH Signup and view all the answers

For a point-to-point link, which type of subnet setup is most appropriate?

/30 subnet mask Signup and view all the answers

What happens when a DHCP server is provisioned with insufficient IP addresses?

Users may experience network outages. Signup and view all the answers

Which topology allows every node to be directly connected to every other node?

Mesh Signup and view all the answers

What should a company implement to comply with an ISP's cease-and-desist order regarding torrent activity?

Content filtering Signup and view all the answers

To enable multiple networks to transfer data between two Layer 2 switches, which method is most appropriate?

802.1Q tagging Signup and view all the answers

What risk may occur if a DHCP server has a limited pool of IP addresses?

Unpredictable network behavior for devices. Signup and view all the answers

Which network topology is preferred for high availability due to its multiple connection paths?

Mesh Signup and view all the answers

In order to restrict access to torrents, which technological solution is likely to be most effective?

Content filtering Signup and view all the answers

What is the primary function of 802.1Q tagging in networking?

To identify and manage VLANs. Signup and view all the answers

What does the GDPR specifically require companies to do?

Protect the personal data and privacy of EU citizens Signup and view all the answers

Which of the following is NOT a function of the GDPR?

Routing tables display Signup and view all the answers

What type of tool is 'tracert'?

Command-line tool for tracing packet routes Signup and view all the answers

In the command output of 'tracert', what do the asterisks (*) indicate?

No response from those hops Signup and view all the answers

Which of the following statements about the 'netstat' command is true?

It displays network connections and interface statistics Signup and view all the answers

Which standard is specifically designed for securing credit card information?

PCI DSS Signup and view all the answers

What is the main purpose of the 'tcpdump' tool?

To capture and analyze network packets Signup and view all the answers

Which command-line tool would be best for identifying points of protocol failure in a network?

tracert Signup and view all the answers

What does a lower administrative distance (AD) indicate about a routing source?

It is more trustworthy. Signup and view all the answers

What is the purpose of configuring multiple static routes with different administrative distances?

To ensure that a primary and backup route exist. Signup and view all the answers

Which command would you use to verify the active routing configurations on a router?

show ip route Signup and view all the answers

Which of the following statements about the application layer in the OSI model is true?

It provides services directly to end-user applications. Signup and view all the answers

In the provided example, what is the administrative distance assigned to the primary route?

1 Signup and view all the answers

What happens if the primary route becomes unavailable?

The router will use the backup route. Signup and view all the answers

What does the application layer do concerning communication between software applications and the network?

It facilitates communication with lower layers of the protocol stack. Signup and view all the answers

What would be a consequence of configuring two static routes with the same destination but no difference in administrative distance?

The router would ignore one of the routes. Signup and view all the answers

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

To allow seamless roaming between access points Signup and view all the answers

Which subnet mask should be used to divide the network 192.168.1.0 into two equal halves?

255.255.255.128 Signup and view all the answers

What does the first subnet encompass when subnetting 192.168.1.0 with a mask of 255.255.255.128?

192.168.1.0 - 192.168.1.127 Signup and view all the answers

What does a higher TTL value in a DNS record indicate?

Longer caching duration for DNS records Signup and view all the answers

What is a recommended action before making significant changes to DNS records?

Reduce the TTL value in advance Signup and view all the answers

Which tool can be used to verify DNS changes after reducing the TTL?

dig Signup and view all the answers

Which option correctly describes the primary function of ESP in IPsec?

To encrypt the entire IP packet Signup and view all the answers

Which of the following transmission types does NOT encrypt transmitted data?

UDP Signup and view all the answers

What happens if a high TTL is set before changing an MX record?

Old DNS information will be cached longer. Signup and view all the answers

Study Notes

CompTIA N10-009 Practice Test

Exam Code: N10-009
Title: CompTIA Network+
Focus: Network concepts, troubleshooting, and security.

Question 1

Scenario: Network administrator User 3 cannot access the network; physical connection is fine but interface lights aren't blinking.
Most likely cause: The switch port is shut down. (Option C)
Reasoning: No blinking indicator lights indicate a potential issue at the physical layer. A switch port can be disabled (shut down) by an admin, preventing connection.

Question 2

Scenario: Creating device IDs within a MIB (Management Information Base) for SNMP server setup on an enterprise network.
Function of a MIB: Defines objects that can be managed using SNMP on a network. (Option C)
Significance: MIBs provide information about network devices to help administrators manage and monitor them via SNMP.

Question 3

Topic: Confidentiality with data at rest.
Best explanation: Data is only accessible after privileged access is granted. (Option C)
Reasoning: This aligns with the core data security principle by restricting access to authorized personnel, preventing unauthorized access to data.

Question 4

Scenario: Email isn't delivering after migrating to a new mail server. MX record change was verified, but the new mail server isn't receiving email.
Solution to prevent issue: Reduce the TTL (Time to Live) record before making MX record changes. (Option B)
Reasoning: High TTLs mean DNS records remain cached longer, delaying change propagation. To prevent issues, reduce the TTL to speed up propagation after an MX record change.

Question 5

Topic: IP transmission type encrypting all data.
Answer: ESP (Encapsulating Security Payload) (Option A)
Reasoning: ESP encrypts the entire IP packet, providing confidentiality, integrity, and authenticity within the IPsec protocol suite.

Question 6

Topic: Mitigation of industrial equipment interference.
Solutions: 5GHz frequency and non-overlapping channels. (Options B and D)
Reasoning: The 5GHz band offers fewer interference issues, and non-overlapping channels in the 2.4GHz band improve Wi-Fi signal clarity.

Question 7

Topic: Disaster recovery metric for data loss.
Metric: Recovery Point Objective (RPO) (Option C)
Definition: The maximum acceptable amount of data loss, measured in time, after a network disruption.

Question 8

Capability: Supporting jumbo frames.
Device: Switch (Option D)
Reasoning: Switches are network devices designed for handling packets. Their design allows for configuration of jumbo frame support.

Question 9

Topic: Illustrating wireless networking coverage.
Solution: Heat map (Option D)
Reasoning: A heat map visually represents signal strength across a building, making it effective for showing wireless network coverage and identifying weak spots.

Question 10

Issue: User unable to access a website. Others can access the site but IP address doesn't resolve to correct URL.
Cause: The hosts file on the affected client is likely misconfigured. (Option A)
Reasoning: The hosts file can override DNS resolution to use a custom IP mapping, which would create this problem.

Question 11

Scenario: Securing ten sites in a mesh network with reduced provisioning time.
Best technology: SD-WAN (Software-Defined Wide Area Network) (Option A)
Reasoning: SD-WAN offers centralized management and automation, reducing site provisioning time and making it more flexible for managing multiple sites.

Question 12

Issue: High interference after installing Cat 8 keystones.
First troubleshooting step: Check whether the end connections of the Cat 8 cables were wrapped in copper tape. (Option A)
Reasoning: Incorrect termination can cause interference in high-frequency cables like Cat 8.

Question 13

Factor: Determining rack size for installation.
Factors: Switch depth and server height. (Options B and F)
Reasoning: These dimensions determine the space required within a rack to accommodate the specific network equipment.

Question 14

Issue: VoIP phone not receiving calls.
Solution: Tag traffic for the voice VLAN on the connected switch port. (Option C)
Reasoning: To isolate VoIP traffic and to ensure proper priority and quality for the VoIP traffic on the network, tagging the VoIP traffic with the voice VLAN on the switch.

Question 15

Attack: Flooding the content addressable memory (CAM) table on a switch.
Attack type: MAC flooding (Option C)
Reasoning: MAC flooding overwhelms the CAM table by sending many fake MAC addresses, causing the switch to enter a fail-open state and broadcast all traffic.

Question 16

Task: Correlating system events in a SIEM system.
Essential protocol: NTP (Network Time Protocol) (Option A)
Reasoning: NTP synchronizes clocks on devices, allowing accurate time stamps for event correlation in SIEM systems.

Question 17

Goal: Secure communication link between two sites with confidentiality.
Technology: ESP (Encapsulating Security Payload) (Option C)
Reasoning: ESP encrypts the entire IP packet, providing end-to-end confidentiality, integrity, and authentication within IPsec.

Question 18

Protocol: Using autonomous system numbers.
Protocol: BGP (Border Gateway Protocol) (Option D)
Reasoning: BGP is crucial for exchanging routing information between different autonomous systems (ASes).

Question 19

Goal: Secure site-to-site connectivity.
Best technology: IPsec (Option D)
Reasoning: IPsec provides robust data security features like authentication, integrity, and encryption, making it well-suited for site-to-site connections.

Question 20

Goal: Conserving IP space for a point-to-point connection(2-routers)
Subnet mask: 255.255.255.240 (Option D).
Reasoning: This provides 16 IP addresses, enough for a point-to-point connection.

Question 21

Goal: Implement cloud services while keeping key services on-site.
Best deployment: Hybrid Cloud (Option B)
Reasoning: A hybrid cloud strategy integrates on-premises resources with cloud services, managing both workloads locally and in the cloud, thus reducing migration effort.

Question 22

Task: Identify routing issues on a user's laptop.
Command: tracert (Option C)
Reasoning: Traceroute (tracert) traces the route of packets, identifying any problems in routing paths.

Question 23

Use case: Fiber connector on a network interface card (NIC).
Connector: LC (Option A)
Reasoning: LC connectors are a compact form factor, suitable for the density of connections found on NICs.

Question 24

Issue: Vulnerability in a router CPU.
Solution: Update the firmware (Option A)
Reasoning: Applying firmware updates addresses CPU-related vulnerabilities by incorporating security patches directly within the device's operating software.

Question 25

Issue: Virtual machine cannot reach external addresses.
Likely cause: DHCP server is offline, (Option C) causing the virtual machine to assume an automatic private IP address.
Reasoning: Automatic Private IP Addressing (APIPA) is a fallback mechanism for DHCP. When a DHCP server isn't available, devices automatically adopt an APIPA address.

Question 26

Task: Determine which internet link web app uses.
Tool: tracert (Option D)
Reasoning: Traceroute (tracert) traces the route of packets, identifying which path is taken and consequently the internet link used for the web app.

Question 27

Issue: Router not routing packets to a web server.
Reason: The router interface is configured with a broadcast address rather than a valid host IP address in the correct subnet.
Reasoning: Directly using a broadcast address often leads to problems in routing packets, as the broadcast address is not usable for communication.

Question 28

Subject: Full-tunnel VPN.
Benefit: Corporate inspection of all traffic (Option C)
Reasoning: A full-tunnel VPN routes all network traffic through the VPN, enabling the company to inspect data for security or compliance reasons.

Question 29

Issue: Fiber indicator light on the patch panel isn't turning on.
First troubleshooting step: Reverse the fibers (Option A)
Reasoning: This quickly confirms if the transmit (TX) and receive (RX) fibers are mistakenly reversed.

Question 30

Topic: Routing protocol with administrative distance.
Protocol: EIGRP (Option B)
Reasoning: EIGRP, having an administrative distance of 90, is one of the routing protocols for network topology information sharing.

Question 31

Need: Reduced costs and increased mobility.
Best choice: Hybrid cloud deployment (Option B)
Reasoning: A hybrid cloud implementation offers the flexibility to use on-site services while leveraging the cloud for remote access.

Question 32

Need: Connecting to enterprise network with company-issued credentials.
Technology: SD-WAN (Option A)
Reasoning: SD-WAN (Software-Defined Wide Area Network) simplifies network management, improves security, and scales to multiple sites with centralized management.

Question 33

Topic: European personal data security.
Regulation: GDPR (General Data Protection Regulation) (Option A)
Reasoning: GDPR, a European Union regulation, sets stringent rules for personal data protection and privacy.

Question 34

Issue: A user is unable to reach an internal website.
Tool: tracert (Option A)
Reasoning: Traceroute will show how far the trace gets before a response is no longer being received from the destination.

Question 35

Cause: Rogue DHCP server.
Reasoning: A rogue DHCP server might assign the same IP address to multiple devices, which likely causes conflicts.

Question 36

Topic: Spanning Tree Protocol (STP) default priority.
Value: 32768 (Option C)
Reasoning: The default bridge priority value for most switches is 32768, to allow configuration for higher preference, if needed.

Question 37

Action: Confirming a theory.
Step: Duplicate the problem (Option A)
Reasoning: Duplicating or recreating a problem helps to verify a theory of probable cause.

Question 38

Issue: Network outages after DHCP server installation.
Most likely cause: Insufficient IP addresses in the DHCP server pool. (Option A)
Reasoning: When available IP addresses in the DHCP server pool are exhausted, new or renewing devices won't be able to receive an IP address.

Question 39

Topology: Direct connections between all nodes.
Topology: Mesh (Option A)
Reasoning: All devices in a mesh network are interconnected directly, providing multiple paths for communication.

Question 40

Action: Complying with a cease-and-desist order from an ISP about torrenting.
Implementation: Content filtering (Option B)
Reasoning: Content filtering can block access to websites or services that facilitate torrenting activity, adhering to the cease-and-desist order.

Question 41

Task: Transferring data across multiple networks.
Technology: 802.1Q tagging (Option B)
Reasoning: 802.1Q tagging defines VLAN IDs, enabling switches to handle and route traffic for multiple networks with a single connection.

Question 42

Problem: Client cannot reach a Linux web server using a web browser, but can ping the server IP.
Command: netstat (Option B)
Reasoning: This command can confirm if the web server is listening at the correct port (e.g., 80 or 443).

Question 43

Device: Operating at multiple OSI layers.
Device: Switch (specifically, Layer 3 switches) (Option B)
Reasoning: Layer 3 switches manage routing and other functions, making them capable of operations beyond the data link layer.

Question 44

Device: End-of-support critical infrastructure switch.
Action: Decommission and replace (Option B).
Reasoning: Keeping an unsupported device poses security risks because no future updates for vulnerabilities will be provided.

Question 45

Action: After testing the root cause theory
Step: Implement the solution (Option D)
Reasoning: Once confirmed, the solution to rectify the issue should be implemented.

Question 46

Device: Converting wireless signals to electronic signals.
Device: Access point (AP) (Option C)
Reasoning: Access points act as the intermediary, converting wireless signals received from client devices into a standard format that the wired network can understand.

Question 47

Need: Console access to a switch.
Connector: RJ45 (Option B)
Reasoning: RJ45 connectors are frequently used for console connections to network devices for directly configuring the device's configuration.

Question 48

Need: Port-based authentication for wired and wireless access.
Technology: 802.1x (Option A)
Reasoning: This protocol helps to control access based on user authentication on physical network ports for both connection types.

Question 49

Attack: Redirecting users to a different website
Attack: DNS poisoning (Option A)
Reasoning: This attack modifies DNS records, potentially leading to redirection to a different website, rather than just the website that was originally requested.

Question 50

Need: Integrating Operational Technology (OT) devices.
Solution: Network segmentation (Option D)
Reasoning: Segmenting networks isolates OT devices, thus improving security and controlling the potential impact of security breaches.

Question 51

Topic: Environmental factors in equipment installation.
Factors: Fire suppression system and floor construction type.
Reasoning: These are crucial for safety and infrastructure stability.

Question 52

Benefit: Seamless user movement between access points.
Technology: ESSID (Option B)
Reasoning: ESSIDs (Extended Service Set Identifiers) allow users to move between access points without losing connection or needing to re-authenticate.

Question 53

Task: Dividing a network into two equal halves.
Subnet mask: 255.255.255.128 (Option D)
Reasoning: This mask divides the original network into two equal-sized subnets with 128 usable addresses each.

Question 54

Need: Implementing a multicast network for audio/video broadcasting
Network: 224.0.0.0 (Option C)
Reasoning: This range is reserved for multicast addresses.

Question 55

Need: Utilizing the full speed of 2.5Gbps fiber connection.
Solution: Link aggregation (Option D).
Reasoning: Combining multiple physical links into one logical link increases total bandwidth capacity, enabling use of the full available speed.

Question 56

Metric: Average lifespan of a device.
Metric: MTBF (Mean Time Between Failures) (Option C)
Reasoning: This metric estimates the average time until a device fails.

Question 57

Topic: Implementing security zones.
Solution: ACLs (Access Control Lists) (Option A)
Reasoning: ACLs can filter traffic, allowing only specific traffic types or destinations from reaching certain network segments, allowing the creation of security zones.

Question 58

Need: SNMP version without plaintext data.
Version: SNMPv3 (Option D)
Reasoning: SNMPv3 supports authentication and encryption, eliminating the use of plaintext data while monitoring network devices.

Question 59

Issue: Cross-talk in Cat 8 cables after using pass-through plugs.
First step: Inspect connectors for issues like touching or exposed wires (Option A)
Reasoning: Cross-talk often stems from improper cabling, and examining connections is the first step to diagnosis.

Question 60

Network Type: Reliable mobile service for public safety vehicles.
Network: Mesh (Option A)
Reasoning: Mesh topologies offer high redundancy and reliability through multiple paths for data transmission, which is essential for reliable communication in mobile environments.

Question 61

Need: Passive IDS on a network switch.
Solution: Port mirroring (SPAN) (Option B)
Reasoning: Port mirroring allows a copy of network traffic to be monitored by the IDS without introducing latency to the main traffic flow.

Question 62

Need: Managing network devices with separate IP addresses.
Solution: Out-of-band management (Option D)
Reasoning: Out-of-band management utilizes a separate network to manage devices, creating a dedicated channel.

Question 63

Requirement: Dedicated link to cloud without encryption.
Technology: Direct Connect (Option A)
Reasoning: Direct Connect is a dedicated connection not involving the public internet.

Question 64

Port: Remote access using SSH protocol
Port: 22 (Option A)
Reasoning: SSH securely uses port 22 for remote access.

Question 65

Attack: Utilizing multiple VLAN tags.
Attack: VLAN hopping (Option B)
Reasoning: This attack uses multiple network tags or VLAN information to traverse boundaries not intended to allow connections through.

Question 66

Purpose: Routing information between different Internet Service Providers (ISPs).
Protocol: Border Gateway Protocol (BGP) (Option C)
Reasoning: BGP is a vital protocol for routing information between ISP networks and autonomous systems.

Question 67

Task: Creating an alias for a DNS record.
Record: CNAME (Option C)
Reasoning: A CNAME record creates an alias for a domain, directing it to another domain's address (e.g., from newapplication.comptia.org to www.comptia.org).

Question 68

Requirement: Traceable network connections.
Solution: Enterprise Authentication (Option A)
Reasoning: It's more secure by providing user-specific, authenticated connections to track back the network user.

Question 69

Need: Backup route for network traffic.
Feature: Administrative distance (Option C)
Reasoning: Lower administrative distances (AD) indicate higher priority; assigning a higher AD to a backup route makes it secondary unless the primary route fails.

Question 70

Layer: Application layer characteristic
Characteristic: Relies upon other layers for packet delivery (Option A)
Reasoning: The application layer needs transport, network, data link, and physical layers for handling data transmission and reception.

Question 71

Need: Supporting multiple networks on a single physical interface.
Solution: Subinterfaces (Option A)
Reasoning: A subinterface is a logical port; configuring one, using VLANs, allows a single physical port on a router to manage separate networks.

Question 72

Troubleshooting step requiring OSI model verification:
Step: Verify functionality (Option D)
Reasoning: Verification encompasses testing at all OSI layers to ensure issues aren't present from the physical to application layer.

Question 73

Need: Security zone for internal corporate users.
Zone: Trusted (Option B)
Reasoning: Internal users should use a Trusted zone to ensure that only authorized individuals can access the resources.

Question 74

Metric: Average duration for a service outage.
Metric: MTTR (Mean Time To Repair) (Option B)
Reasoning: MTTR measures the average time required for repair, essential for estimating service outage duration.

Question 75

Task: Configuring a network for two buildings, with internet inspection and desktop traffic isolation.
Diagram Layout: A detailed description of the corrected diagram layout is included for the simulation, making sure to comply with the requirements and optimizing security practice.

Question 76

Task: Reconfigure access layer switches for accurate network connections.
Remediation: Correct VLAN configurations on the switches per the provided diagram for each port's functionality and device connections.

Question 77

Task: Validate the routing pathway between workstation A and fileserver 2.
Procedure: Review routing tables for the respective routers (A, B, and C) to confirm necessary routes. Add missing routes using static configurations if necessary.

Question 78

Task: Configuring access points for a dense office environment with interference mitigation.
Steps: Ensure appropriate channels are chosen for each access point to minimize interference and prevent overlapping signals. Configure security settings, including SSID and passphrase, for the wireless setup.

Question 79

Task: Subnetting a datacenter network and configuring it for various office users.
Procedure: Implement a suitable subnet range for devices in the datacenter and buildings.

Question 80

Task: Performing network discovery and configuration.
Procedure: Employ appropriate networking commands or tools like nmap or netdiscover to scan the network, and analyze and fill in missing details in the network diagram.

Studying That Suits You

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

Description

Test your knowledge on key network security protocols and their functions. This quiz covers topics such as IKE, BGP, and routing protocols, along with subnetting strategies and DHCP server challenges. Gain insights into secure communications and the roles of various networking protocols.