ARP Process and IPv4 Addresses
16 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

When a host has an IPv4 packet sent to a host on a remote network, what address is requested in the ARP request?

  • the MAC address of the switch port that connects to the sending host
  • the MAC address of the default gateway, the router interface closest to the sending host (correct)
  • the IPv4 address of the default gateway
  • the IPv4 address of the destination host

    • How does the ARP process use an IPv4 address?

  • to determine the MAC address of the remote destination host
  • to determine the MAC address of a device on the same network (correct)
  • to determine the amount of time a packet takes when traveling from source to destination
  • to determine the network number based on the number of bits in the IP address

    • What does the ARP table in a switch map together?

  • Layer 3 address to a Layer 4 address
  • Layer 3 address to a Layer 2 address (correct)
  • Layer 4 address to a Layer 2 address
  • Layer 2 address to a Layer 4 address

    • What is one function of the ARP protocol?

    <p>resolving an IPv4 address to a MAC address</p> Signup and view all the answers

    Which router component holds the routing table, ARP cache, and running configuration file?

    <p>RAM</p> Signup and view all the answers

    What type of information is contained in an ARP table?

    <p>IPv4 address-to-MAC address mappings</p> Signup and view all the answers

    A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway to perform a man-in-the-middle attack. Which command should the analyst use to view the MAC address a host is using to reach the default gateway?

    <p>arp -a</p> Signup and view all the answers

    What is a function of ARP?

    <p>resolving known IPv4 addresses to unknown MAC addresses</p> Signup and view all the answers

    What is the purpose of ARP in an IPv4 network?

    <p>to obtain a specific MAC address when an IP address is known</p> Signup and view all the answers

    What action does a Layer 2 switch take when it receives a Layer 2 broadcast frame?

    <p>It forwards the frame out all ports.</p> Signup and view all the answers

    What is the destination MAC address used in an ARP request?

    <p>FFFF.FFFF.FFFF</p> Signup and view all the answers

    What is the destination MAC address of an ICMPv6 Neighbor Solicitation message?

    <p>multicast</p> Signup and view all the answers

    What does a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?

    <p>It broadcasts the frame out all ports on the switch.</p> Signup and view all the answers

    Which two ICMPv6 messages are used during the Ethernet MAC address resolution process?

    <p>Neighbor Advertisement</p> Signup and view all the answers

    What is the primary function of ARP in a network?

    <p>Resolving known IPv4 addresses to unknown MAC addresses</p> Signup and view all the answers

    What action does a Layer 2 switch take when it receives a frame with a MAC address not in its MAC table?

    <p>It broadcasts the frame out all ports on the switch.</p> Signup and view all the answers

    Study Notes

    ARP Protocol and Address Resolution

    • When a host sends an IPv4 packet to a remote network, it requests the MAC address of the default gateway in the ARP request.
    • ARP uses an IPv4 address to determine the MAC address of a device on the same network.

    ARP Table and Address Mapping

    • The ARP table in a switch maps a Layer 3 address to a Layer 2 address.
    • The ARP table contains IPv4 address-to-MAC address mappings.

    Router Components and Functions

    • The ARP cache is held in a router's RAM.
    • The function of ARP is to resolve known IPv4 addresses to unknown MAC addresses.

    Security and ARP Spoofing

    • To view the MAC address a host is using to reach the default gateway, use the command arp -a.
    • ARP spoofing can be used to perform a man-in-the-middle attack.

    Layer 2 Switches and Frames

    • When a Layer 2 switch receives a Layer 2 broadcast frame, it forwards the frame out all ports.
    • If the destination MAC address of a received frame is not in the MAC table, the switch broadcasts the frame out all ports on the switch.

    ICMPv6 Messages and Address Resolution

    • The destination MAC address of an ICMPv6 Neighbor Solicitation message is a multicast address.
    • The two ICMPv6 messages used during the Ethernet MAC address resolution process are Neighbor Solicitation and Neighbor Advertisement.

    Studying That Suits You

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

    Quiz Team

    Description

    Test your knowledge on how ARP requests are sent and processed in a network, including the addresses involved.

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser