O'Reilly logo

Cisco Networking Essentials, 2nd Edition 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

Chapter 4Protocols

A protocol is an agreement on how something is done. There are many types of protocols. There are business protocols that define how business is properly carried out and social protocols that define what type of behavior is acceptable. Networking protocols define the rules of communication between devices.

It is possible for computers to be enabled for more than one networking protocol at a time; but for two computers to interact with each other, both devices must share at least one networking protocol. In this respect, protocols are like languages. If both devices don't speak a common language, they can't communicate.

In this chapter, protocols at every layer of the TCP/IP model are discussed. Some of these are networking ...

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