O'Reilly logo

Modern Linux Administration by Sam R. Alapati

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 2. Networking Essentials for a System Administrator

Networking is complex – and my goal is to simplify it a bit so you can be an effective system administrator. Networking has always been a key component of a Linux system administrator’s skill set. However, now more than ever, it has become really one of the, if not the most important skill sets you need to master. The reason is that today, with heavy internet driven workloads and the proliferation of cloud based systems, networking has become the fulcrum of everything. When dealing with a cloud environment such as Amazon’s AWS, you’ll find that most of the complex work involves the setting up of the cloud DNS, internet gateways, virtual private networks and so on.

As a system administrator, one of your key tasks is to ensure that your system is able to accept and send data, both from within your own corporate network as well as from anywhere on the internet. It’s therefore essential that you understand the key components of a network and grasp how data is moved through the network. You must also understand the important protocols that are in use today to move data across networks.

The TCP/IP (Transmission Control Protocol/Internet Protocol) protocols are the two key protocols that stand at the center of modern networking. This chapter builds on basics such as packets and frames and leads up to a thorough explanation of the TCP/IP protocol. In addition, I also talk about several key networking concepts such as the domain ...

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