2006, Cisco Systems, Inc. All rights reserved.

Presentation_ID.scr 1

2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential Presentation_ID 1

TNE10006/TNE60006: Networks and Switching

ARP Address Resolution Protocol

Presentation_ID 2 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

Outline

Interaction between Ethernet MAC and IP

ARP Purpose

ARP Operation

Presentation_ID 3 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

MAC and IP

MAC and IP

MAC Address

This address does not change

Similar to the name of a person

Known as physical address because physically assigned to the host NIC

IP Address

Similar to the address of a person

Based on where the host is actually located

Known as a logical address because assigned logically

Assigned to each host by a network administrator Both the physical MAC and logical IP addresses are required for a computer to communicate just like both the name and address of a person are required to send a letter.

Presentation_ID 4 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

Ethernet MAC

End-to-End Connectivity, MAC, and IP

IP Packet Encapsulated in an Ethernet Frame

Presentation_ID 5 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

ARP

Introduction to ARP

Presentation_ID 6 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

ARP

ARP Operation

2006, Cisco Systems, Inc. All rights reserved.

Presentation_ID.scr 2

Presentation_ID 7 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

ARP

ARP Operation

Presentation_ID 8 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

ARP

ARP Operation

Presentation_ID 9 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

ARP

ARP Operation

Presentation_ID 10 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

ARP

ARP Functions/Operation

Presentation_ID 11 2008 Cisco Systems, Inc. All rights reserved. Cisco Confidential

ARP

Summary

In this lecture, we covered:

Interaction between Ethernet MAC and IP

ARP Purpose

ARP Operation