Address Resolution: MAC and IP on Same Network
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Questions and Answers

What is the primary function of the Layer 3 logical address?

  • Associating the IP address of a device with the MAC address of the device NIC
  • Delivering frames from one NIC to another NIC on the same network
  • Determining the best path for forwarding the IPv4 packet
  • Sending packets from the source device to the destination device (correct)

What is the role of routers in delivering packets to a remote network?

  • Examine the source IP address to determine the best path
  • Deliver frames from one NIC to another NIC on the same network
  • Associating the IPv4 address of a device with the MAC address of the device NIC
  • De-encapsulate the Layer 2 information and encapsulate the IPv4 packet in a new data link frame (correct)

What is the protocol used to associate the IPv4 address of a device with the MAC address of the device NIC?

  • IPSec
  • ARP (correct)
  • ICMP
  • DHCP

When a destination IP address is on the same network, what is the destination MAC address?

<p>The MAC address of the destination device (C)</p> Signup and view all the answers

What happens when a device searches the ARP table and cannot find the destination IPv4 address?

<p>The device sends an ARP request (B)</p> Signup and view all the answers

What is the purpose of the ARP table?

<p>To convert IPv4 addresses to MAC addresses (B)</p> Signup and view all the answers

What is the primary function of the Layer 2 physical address?

<p>Delivering frames from one NIC to another NIC on the same network (C)</p> Signup and view all the answers

What is the role of the default gateway in delivering packets to a remote network?

<p>Determining the best path for forwarding the IPv4 packet (B)</p> Signup and view all the answers

When is an ARP request sent?

<p>When there is no ARP table entry (C)</p> Signup and view all the answers

What happens when the device locates the IPv4 address in the ARP table?

<p>The device uses the corresponding MAC address as the destination MAC address (D)</p> Signup and view all the answers

What happens when a router receives the Ethernet frame?

<p>It de-encapsulates the Layer 2 information and determines the next hop device (C)</p> Signup and view all the answers

What is the term used to describe the relationship between an IPv4 address and a MAC address?

<p>map (C)</p> Signup and view all the answers

How are the IP addresses of the IP packets in a data flow associated with the MAC addresses on each link along the path to the destination?

<p>Using the ARP protocol (C)</p> Signup and view all the answers

What is the primary function of ICMPv6 in an IPv6 network?

<p>To associate the IPv6 address of a device with the MAC address of the device NIC (B)</p> Signup and view all the answers

What type of address is used to identify the destination device on another network?

<p>Default gateway address (C)</p> Signup and view all the answers

What is stored temporarily in RAM?

<p>The ARP table or ARP cache (C)</p> Signup and view all the answers

When does a device search the ARP table for the IPv4 address of the default gateway?

<p>When the packet's destination IPv4 address is on a different network (A)</p> Signup and view all the answers

What is the source of the MAC address in an Ethernet Layer 2 frame?

<p>Ethernet NIC on the source host (A)</p> Signup and view all the answers

What is the purpose of ARP in an IPv4 network?

<p>To determine the destination MAC address of a local device (A)</p> Signup and view all the answers

What is an ARP table composed of?

<p>Entries that map IPv4 addresses to MAC addresses (C)</p> Signup and view all the answers

What type of address is used to identify a device on the same local network segment?

<p>MAC address (A)</p> Signup and view all the answers

What is required to send a packet to another host on the same local IPv4 network?

<p>Both the IPv4 address and the MAC address of the destination device (A)</p> Signup and view all the answers

What is the function of the destination MAC address in an Ethernet Layer 2 frame?

<p>To identify the destination device on the same local network segment (D)</p> Signup and view all the answers

What is the relationship between ARP and ICMPv6?

<p>ARP is used for IPv4 networks, while ICMPv6 is used for IPv6 networks (A)</p> Signup and view all the answers

What is the primary purpose of an ARP table?

<p>To temporarily cache the mapping for the devices on the LAN (D)</p> Signup and view all the answers

What is the primary function of the ARP reply in a network?

<p>To match IPv4 addresses to MAC addresses (D)</p> Signup and view all the answers

What is the purpose of the ICMPv6 Neighbor Solicitation message?

<p>To resolve IPv6 addresses to MAC addresses (B)</p> Signup and view all the answers

What is the effect of ARP cache timer expiration?

<p>ARP table entries are removed (D)</p> Signup and view all the answers

What is the main function of the IPv6 Neighbor Discovery protocol?

<p>To match IPv6 addresses to MAC addresses (A)</p> Signup and view all the answers

What is the purpose of the show ip arp command on a Cisco router?

<p>To display the ARP table on the router (D)</p> Signup and view all the answers

What is the purpose of the ICMPv6 Redirect message?

<p>To redirect packets to a better next-hop (B)</p> Signup and view all the answers

What is the purpose of the arp –a command on a Windows 10 PC?

<p>To display the ARP table on the PC (D)</p> Signup and view all the answers

What is the main difference between IPv4 and IPv6 in terms of address resolution?

<p>IPv4 uses ARP, while IPv6 uses ND (B)</p> Signup and view all the answers

What is the consequence of excessive ARP broadcasts?

<p>Some reduction in performance (C)</p> Signup and view all the answers

What is the purpose of the Router Solicitation message?

<p>To facilitate router discovery (A)</p> Signup and view all the answers

What is the purpose of ARP spoofing?

<p>To reply to an ARP request with a fake MAC address (D)</p> Signup and view all the answers

What is the purpose of the Neighbor Advertisement message?

<p>To advertise the device's MAC address (B)</p> Signup and view all the answers

What is the effect of ARP poisoning?

<p>The device's ARP table is updated with the fake MAC address (C)</p> Signup and view all the answers

What is the primary purpose of the dynamic ARP inspection (DAI) technique?

<p>To inspect and protect against ARP attacks (A)</p> Signup and view all the answers

What is the significance of the ARP cache timer duration?

<p>It determines the duration of ARP table entries (D)</p> Signup and view all the answers

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