CCNA1

• What is the title of Chapter 9? Address Resolution
• There are two primary addresses assigned to a device on an Ethernet LAN:

  Layer 2 physical address (the MAC address) – Used for NIC to NIC communications on the same Ethernet network.

  Layer 3 logical address (the IP address) – Used to send the packet from the source device to the destination device.
• ARP is used by IPv4 to associate the IPv4 address of a device with the MAC address of the device NIC.
• ICMPv6 is used by IPv6 to associate the IPv6 address of a device with the MAC address of the device NIC.
• A device uses ARP to determine the destination MAC address of a local device when it knows its IPv4 address.