module06-arpV2

module06-arpV2 - 1 Address Resolution Protocol (ARP)...

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Unformatted text preview: 1 Address Resolution Protocol (ARP) Relates to Lab 2. This module is about the address resolution protocol. 2 Network Layer Link Layer IP ARP Network Access RARP Media ICMP IGMP Transport Layer TCP UDP Overview 3 ARP and RARP Note: The Internet is based on IP addresses Data link protocols (Ethernet, FDDI, ATM) may have different (MAC) addresses The ARP and RARP protocols perform the translation between IP addresses and MAC layer addresses We will discuss ARP for broadcast LANs, particularly Ethernet LANs RARP E thernet MAC address (48 b it) ARP IP address (32 b it) 4 Processing of IP packets by network device drivers loopback Driver IP Input Put on IP input queue ARP demultiplex Ethernet Frame Ethernet IP destination of packet = local IP address ? IP destination = multicast or broadcast ? IP Output Put on IP input queue No: get MAC address with ARP ARP Packet IP datagram No Yes Yes Ethernet Driver 5 Address Translation with ARP ARP Request : Argon broadcasts an ARP request to all stations on the network: What is the hardware address of Router137? Argon 128.143.137.144 00:a0:24:71:e4:44 Router137 128.143.137.1 00:e0:f9:23:a8:20 ARP Request: What is the MAC address of 128.143.71.1? 6...
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module06-arpV2 - 1 Address Resolution Protocol (ARP)...

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