Network Ports and Patch Panels

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The Bits and Bytes of Computer Networking

6504件の評価

Google

The Bits and Bytes of Computer Networking

6504件の評価

Specialization Google IT Support Professional Certificate における 5 の 2 コース

This course is designed to provide a full overview of computer networking. We’ll cover everything from the fundamentals of modern networking technologies and protocols to an overview of the cloud to practical applications and network troubleshooting. We’ll wrap up by covering how this information might show up in a job interview and giving you a few tips for troubleshooting on the spot. By the end of this course, you’ll be able to: ● describe computer networks in terms of a five-layer model. ● understand all of the standard protocols involved with TCP/IP communications. ● grasp powerful network troubleshooting tools and techniques. ● learn network services like DNS and DHCP that help make computer networks run. ● understand cloud computing, everything as a service, and cloud storage.

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Introduction to Networking

Welcome to the Networking course of the IT Support Professional Certificate! In the first week of this course, we will cover the basics of computer networking. We will learn about the TCP/IP and OSI networking models and how the network layers work together. We'll also cover the basics of networking devices such as cables, hubs and switches, routers, servers and clients. We'll also explore the physical layer and data link layer of our networking model in more detail. By the end of this module, you will know how all the different layers of the network model fit together to create a network.

Moving Bits Across the Wire2:19

Twisted Pair Cabling and Duplexing1:54

Network Ports and Patch Panels2:28

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The final steps of how the physical layer works take

place at the end points our network links.

Twisted Pair network cables are terminated with

a plug that takes the individual internal wires and exposes them.

The most common plug is known as an RJ-45 or Registered Jack 45.

It's one of many cable plugs specifications but

by far the most common in computer networking.

A network cable with an RJ-45 plug can connect to an RJ-45 network port.

Network ports are generally directly

attached to the devices that make up a computer network.

Switches would have many network ports because their purpose is to connect many devices.

But servers and desktops usually only have one or two.

Your laptop, tablet or phone probably don't have any.

But we'll get to wireless networking in the later module.

Most network ports have two small LEDs.

One is the link light and the other is the activity light.

The link light will be lit when a cable is properly

connected to two devices that are both powered on.

The activity light will flash when data is actively transmitted across the cable.

A long time ago,

the flashing in the activity light corresponded

directly to the one's and zero's being sent.

Today, computer networks are so fast that the activity light doesn't

really communicate much other than if there's any traffic or not.

On switches, sometimes the same LED is used for both link and activity status.

It might even indicate other things like links speed.

You'll have to read up on a particular piece of hardware you're working with but there

will almost always be some troubleshooting data available to you through port lights.

Sometimes a network port isn't connected directly to a device.

Instead, there might be network ports mounted in a wall or underneath your desk.

These ports are generally connected to the network via cables

ran through the walls that eventually end at a patch panel.

A. Patch panel is a device containing many net ports but it does no other work.

It's just a container for the endpoints of many runs of cable.

Additional cables are then generally ran from a patch panel to switches or

routers to provide network access to the computers at the other end of those links.

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