Podcast
Podcast
Podcast
Something went wrong
Questions and Answers
Questions and Answers
What addressing information is recorded by a switch to build its MAC address table?
What addressing information is recorded by a switch to build its MAC address table?
the source Layer 2 address of incoming frames
How many IP addresses in the pool are left to be assigned to other hosts?
How many IP addresses in the pool are left to be assigned to other hosts?
247
Why might a network technician try to ping the default gateway from the employee laptop?
Why might a network technician try to ping the default gateway from the employee laptop?
to verify connectivity with the device that provides access to remote networks
How many bits make up the single IPv6 hextet :10CD:?
How many bits make up the single IPv6 hextet :10CD:?
Which three pieces of information are identified by a URL?
Which three pieces of information are identified by a URL?
Which type of applications are best suited to use UDP as the transport layer protocol?
Which type of applications are best suited to use UDP as the transport layer protocol?
What type of server would use IMAP?
What type of server would use IMAP?
Which three types of nodes should be assigned static IP addresses on a network?
Which three types of nodes should be assigned static IP addresses on a network?
Why is DHCP for IPv4 preferred for use on large networks?
Why is DHCP for IPv4 preferred for use on large networks?
Which message does an IPv4 host use to reply when it receives a DHCPOFFER message from a DHCP server?
Which message does an IPv4 host use to reply when it receives a DHCPOFFER message from a DHCP server?
What message is sent by the server to let the client know it is able to use the provided IP information?
What message is sent by the server to let the client know it is able to use the provided IP information?
How is a DHCPDISCOVER transmitted on a network to reach a DHCP server?
How is a DHCPDISCOVER transmitted on a network to reach a DHCP server?
What is the result if the default gateway address is misconfigured on a PC?
What is the result if the default gateway address is misconfigured on a PC?
Which statement accurately describes dynamic NAT?
Which statement accurately describes dynamic NAT?
What purpose does NAT64 serve in IPv6?
What purpose does NAT64 serve in IPv6?
Which type of IPv6 address is not routable and used only for communication on a single subnet?
Which type of IPv6 address is not routable and used only for communication on a single subnet?
What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?
What is the valid most compressed format possible of the IPv6 address 2001:0DB8:0000:AB00:0000:0000:0000:1234?
What is an advantage of UDP over TCP?
What is an advantage of UDP over TCP?
What layer of the TCP/IP suite makes sure that all the data packets of a message arrive safely at the destination?
What layer of the TCP/IP suite makes sure that all the data packets of a message arrive safely at the destination?
How does a client computer determine what source port number to assign to a UDP header?
How does a client computer determine what source port number to assign to a UDP header?
What is a socket?
What is a socket?
What is the purpose of using a source port number in a TCP communication?
What is the purpose of using a source port number in a TCP communication?
Which two protocols are used in the process of sending and receiving emails?
Which two protocols are used in the process of sending and receiving emails?
What is a function of a DNS server?
What is a function of a DNS server?
Which two applications provide virtual terminal access to remote servers?
Which two applications provide virtual terminal access to remote servers?
What is the purpose of a DMZ?
What is the purpose of a DMZ?
Which feature would the administrator configure to allow users on the outside network to establish HTTP connections to the internal website?
Which feature would the administrator configure to allow users on the outside network to establish HTTP connections to the internal website?
What specialized network device is responsible for permitting or blocking traffic between networks?
What specialized network device is responsible for permitting or blocking traffic between networks?
Why should WEP not be used in wireless networks today?
Why should WEP not be used in wireless networks today?
What happens when a wireless access point is configured to stop broadcasting the SSID?
What happens when a wireless access point is configured to stop broadcasting the SSID?
What is a characteristic of a computer worm?
What is a characteristic of a computer worm?
Which type of attack involves an attacker using a powerful computer to try a large number of possible passwords in rapid succession to gain access to a system?
Which type of attack involves an attacker using a powerful computer to try a large number of possible passwords in rapid succession to gain access to a system?
Which three attacks exploit human behavior?
Which three attacks exploit human behavior?
Which type of attack exploits human behavior to gain confidential information?
Which type of attack exploits human behavior to gain confidential information?
Which statement accurately characterizes the evolution of threats to network security?
Which statement accurately characterizes the evolution of threats to network security?
Which three steps must be completed to manually connect an Android or iOS device to a secured wireless network?
Which three steps must be completed to manually connect an Android or iOS device to a secured wireless network?
What is a disadvantage of deploying a peer-to-peer network model?
What is a disadvantage of deploying a peer-to-peer network model?
Which factor classifies a host as a server?
Which factor classifies a host as a server?
Which term is used to describe a network device that relies on another device to obtain information?
Which term is used to describe a network device that relies on another device to obtain information?
How many unique values are possible using a single binary digit?
How many unique values are possible using a single binary digit?
Which network device is used to translate a domain name to the associated IP address?
Which network device is used to translate a domain name to the associated IP address?
A consumer places a smartphone close to a pay terminal at a store and the shopping charge is successfully paid. Which type of wireless technology was used?
A consumer places a smartphone close to a pay terminal at a store and the shopping charge is successfully paid. Which type of wireless technology was used?
What should be done if customer mobile devices are not receiving network configuration information in a coffee shop?
What should be done if customer mobile devices are not receiving network configuration information in a coffee shop?
What wireless technology would a user looking for wireless headphones likely use?
What wireless technology would a user looking for wireless headphones likely use?
If you were drawing a physical topology of your school network, what type of information would you include?
If you were drawing a physical topology of your school network, what type of information would you include?
When authenticating within Packet Tracer, which two items could you use?
When authenticating within Packet Tracer, which two items could you use?
What are two advantages of using fiber-optic cabling to interconnect devices?
What are two advantages of using fiber-optic cabling to interconnect devices?
Which type of network cable is commonly used to connect office computers to the local network?
Which type of network cable is commonly used to connect office computers to the local network?
What statement describes the use of the ping command?
What statement describes the use of the ping command?
Which type of network cable is used to connect the components that make up satellite communication systems?
Which type of network cable is used to connect the components that make up satellite communication systems?
What are two sources of electromagnetic interference that can affect data transmissions?
What are two sources of electromagnetic interference that can affect data transmissions?
What terms represent the maximum and actual speed that can be utilized by a device to transfer data?
What terms represent the maximum and actual speed that can be utilized by a device to transfer data?
Which type of network component can be used to share an attached printer to the network?
Which type of network component can be used to share an attached printer to the network?
Which criterion can be used to select the appropriate type of network media for a network?
Which criterion can be used to select the appropriate type of network media for a network?
What action does the ARP process take when a host needs to build a frame, but the ARP cache does not contain an address mapping?
What action does the ARP process take when a host needs to build a frame, but the ARP cache does not contain an address mapping?
Which three layers of the OSI model map to the application layer of the TCP/IP model?
Which three layers of the OSI model map to the application layer of the TCP/IP model?
What statement is true about MAC addresses?
What statement is true about MAC addresses?
What process is used to place one message inside another message for transfer from the source to the destination?
What process is used to place one message inside another message for transfer from the source to the destination?
What type of message is sent to a specific group of hosts?
What type of message is sent to a specific group of hosts?
Name the three private IP ranges.
Name the three private IP ranges.
Which two OSI model layers have the same functionality as two layers of the TCP/IP model?
Which two OSI model layers have the same functionality as two layers of the TCP/IP model?
Which type of network model describes the functions that must be completed at a particular layer but does not specify exactly how each protocol should work?
Which type of network model describes the functions that must be completed at a particular layer but does not specify exactly how each protocol should work?
The Institute of Electrical and Electronics Engineers is responsible for standards in which two areas?
The Institute of Electrical and Electronics Engineers is responsible for standards in which two areas?
What does the 100 in the 100BASE-T standard indicate?
What does the 100 in the 100BASE-T standard indicate?
What is the purpose of protocols in data communications?
What is the purpose of protocols in data communications?
What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?
What will a Cisco LAN switch do if it receives an incoming frame and the destination MAC address is not listed in the MAC address table?
Which logical address is used for the delivery of data to a remote network?
Which logical address is used for the delivery of data to a remote network?
How can a network administrator reduce the number of devices that receive broadcast traffic?
How can a network administrator reduce the number of devices that receive broadcast traffic?
Which two functions are primary functions of a router?
Which two functions are primary functions of a router?
What is the probable cause of a computer being able to access devices on the same network but not on other networks?
What is the probable cause of a computer being able to access devices on the same network but not on other networks?
What will a router do to forward an incoming packet to a remote destination host?
What will a router do to forward an incoming packet to a remote destination host?
What configuration can a network administrator issue in order to successfully forward incoming packets if a router does not contain a route to the remote destination network?
What configuration can a network administrator issue in order to successfully forward incoming packets if a router does not contain a route to the remote destination network?
Which two parts are components of an IPv4 address?
Which two parts are components of an IPv4 address?
When a host sends a packet, how does it determine if the destination of the packet is on the same local network or on a remote network?
When a host sends a packet, how does it determine if the destination of the packet is on the same local network or on a remote network?
What is the default subnet mask for an IP address of 198.133.219.4?
What is the default subnet mask for an IP address of 198.133.219.4?
What are the three layers of a hierarchical network design model?
What are the three layers of a hierarchical network design model?
Questions and Answers
Something went wrong
Flashcards
Flashcards are hidden until you start studying
Flashcards
Something went wrong
Study Notes
Study Notes
Network Models and Types
- Peer-to-peer networks lack centralized administration, resulting in minimal security and limited scalability.
- Servers are classified by having specific server software installed, impacting performance alongside CPU and memory.
- Clients are devices that request services from servers, such as web browsers requesting pages from websites.
Data Transmission and Communication
- A single binary digit can represent 2 unique values.
- DNS servers translate domain names into IP addresses, enabling web browsing using familiar names.
- NFC technology facilitates data exchange over short distances, ideal for contactless payments.
- The DHCP server must be functional for devices to receive network configuration automatically.
Networking Hardware
- Bluetooth technology is commonly used for short-range connections, suitable for devices like headphones, keyboards, and mice.
- Twisted-pair cables connect office computers to local networks, while coaxial cables are used in satellite communication systems.
- Fiber-optic cables are immune to EMI and RFI and can transmit data over long distances effectively.
Network Topology and Layout
- Physical topology diagrams indicate the physical location of devices within a building.
- A broadcast in a LAN reaching 200 devices can be minimized by segmenting the LAN into smaller broadcast domains.
IP Addressing and Networking Protocols
- Private IP address ranges include:
- 10.0.0.0 - 10.255.255.255
- 172.16.0.0 - 172.31.255.255
- 192.168.0.0 - 192.168.255.255
- IPv4 addresses consist of a network portion, which identifies the specific network, and a host portion, which identifies individual hosts.
- The default subnet mask for an IP address in the range of 198.133.219.4 is 255.255.255.0.
OSI and TCP/IP Models
- The application layer of the TCP/IP model encompasses the session, presentation, and application layers of the OSI model.
- Reference models like OSI provide an understanding of network functions without detailing the protocols.
Networking Commands and Processes
- The ping command tests connectivity between devices, using round-trip time as an indicator.
- ARP requests are sent for resolving MAC addresses when address mappings are absent in the ARP cache.
Device Communication and Routing
- Routers perform path selection and packet forwarding, using routing tables to direct traffic based on destination addresses.
- The MAC address table in switches is built from the source MAC addresses of incoming frames.
Troubleshooting and Connectivity
- Connectivity issues are often diagnosed by pinging the default gateway, enabling checks of access to remote networks.
- When a device cannot access external networks but can communicate locally, it often points to an invalid default gateway configuration.
Additional Network Components
- Optical and electrical interference in data transmission can stem from devices like fluorescent lights and microwave ovens.
- Encapsulation processes wrap data messages in protocol packets for transmission, allowing for structured data delivery.
Hierarchical Network Design
- Cisco's hierarchical network design includes three layers: core, distribution, and access, each serving distinct roles in traffic management and connectivity efficiency.### IPv6 and Networking
- A single IPv6 hextet is composed of 16 bits, formed by four hexadecimal characters.
- URLs convey three crucial pieces of information: the protocol (like HTTP or FTP), the domain name, and the resource location.
- UDP is optimal for applications requiring minimal transmission delay, benefiting from its lightweight, connectionless nature.
Email Protocols
- IMAP (Internet Message Access Protocol) is used for email retrieval, while SMTP (Simple Mail Transfer Protocol) handles sending emails.
- Static IP addresses are essential for servers, gateways, and printers to ensure consistent accessibility and management in networks.
DHCP and Address Management
- DHCP (Dynamic Host Configuration Protocol) is preferred in large networks for its efficient IP address management compared to static assignment.
- Upon receiving a DHCPOFFER from a DHCP server, a client responds with a DHCPREQUEST message to confirm address allocation.
- The DHCPACK message is sent by the server to confirm that the client can utilize the provided IP address.
Network Configuration and IP Addressing
- A DHCPDISCOVER message is broadcasted to locate DHCP servers, targeting a specific IP address and port for communication.
- If a PC has a misconfigured default gateway, it can interact with local devices but cannot communicate with devices on remote networks.
- Dynamic NAT allows for automated mapping between internal and external IP addresses, facilitating more efficient resource management.
Connectivity and Address Translation
- NAT64 is used to convert IPv6 packets into IPv4 packets, supporting the transition from IPv4 to IPv6 networks.
- Link-local addresses are non-routable and used solely for communication within a single subnet.
- The most compressed format of an IPv6 address can omit leading zeros and utilize "::" to represent contiguous zero hextets.
Protocol Comparisons
- UDP has less overhead than TCP, as it lacks reliability features like packet acknowledgment and independent packet sequencing.
- The transport layer of the TCP/IP suite ensures data packet arrival and manages potential loss via retransmission requests.
Sockets and Ports
- A socket is defined as the combination of a source IP address and port number, or a destination IP address and port number.
- Source port numbers in TCP communications help track multiple conversations and maintain open response entries from servers.
Security Protocols
- Firewalls regulate traffic between networks based on access policies, ensuring security within network communications.
- Wireless security should avoid WEP due to its vulnerability; it can be easily compromised by attackers.
Wireless Networking
- Configuring a wireless access point to stop broadcasting its SSID makes the network invisible to unauthorized users, though it remains accessible to those with the SSID.
Cybersecurity Threats
- A computer worm propagates itself across a network by exploiting vulnerabilities, distinguishing it from a virus due to its self-sending characteristics.
- Brute force attacks involve rapid attempts at guessing passwords to gain system access.
- Social engineering, including tactics like phishing, pretexting, and vishing, exploits human behavior to breach security.
Network Security Evolution
- Internal threats might inflict more damage than external ones due to direct access to corporate networks and sensitive data, making them a significant concern in network security.
- Connecting mobile devices, like Android or iOS, to secured wireless networks requires inputs of the SSID, security type, and authentication password.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Study Notes
Something went wrong
