O'Reilly logo

Cisco Networking Essentials by Troy McMillan

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Describing the Functions of ARP

When data is being transferred from one network or subnet to another, routing takes place and Internet layer information is utilized (IP addresses) by the routers to perform this function. However, when data is sent within a network or subnet, routing is not required. In that case, operations happen at the frame level. In this section of the chapter, you'll look at how the Address Resolution Protocol, or ARP, does its job of identifying and placing the source and destination MAC address in the frame and why the MAC addresses (unlike the IP addresses) may change many times as the data travels across the network.

Illustrating the ARP Broadcast

After the Internet layer places the source and destination IP addresses ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required