Networking Essentials

A brief introduction of what will be covered in this lesson.

The seven layer OSI model rationalizes how data travels across the network.

Let's take a look at the four layers in the TCP/IP protocol stack.

Protocols are where we get the magic and the mysticism happening within networks.

An end of lesson summary of what was covered in this lesson.

What is an internetwork connectivity device?

Every network card in existence has a unique property. This property is a media access code, or MAC address.

For data to be transported across an Ethernet network, it needs to be assembled into an Ethernet frame.

In this video you will learn about the network operating systems.

An end of lesson summary of what was covered in this lesson.

A brief introduction of what will be covered in this lesson.

You will learn that some IP addresses are reserved addresses.

How does a computer system access resources on other networks, or indeed, how does a computer system find its way off of one network and to the Internet?

Why break large networks down into smaller subnetworks or subnets?

Computers use binary number format. What does that mean for our IP addresses?

We're running out of IP addresses because the standard classful IP addressing system is wasteful. What should we do?

The available public IPv4 address space is limited and nearly exhausted. So, we need another solution. That solution is IP Version 6, or IPv6.

IPv6 offers sextillions of IP addresses, which is billions of IP addresses per square millimeter of the planet's surface.

When we're working with an IPv6 network, there are three major types of IP addresses that we'll work with.

Within IPv4, you have two transport protocols available.

The Transmission Control Protocol is the TCP element of the TCP/IP protocol suite.

The User Datagram Protocol, or UDP, is the second transport protocol in the TCP/IP Suite.

An end of lesson summary of what was covered in this lesson.

A brief introduction of what will be covered in this lesson.

The TCP/IP protocol is operating around a four-layer stack. An application layer, a transport layer, an Internet layer and a network interface layer. Learn what sits within these layers.

You know that on an IP network, every machine must have an individual or unique IP address. Now, imagine that this network has got thousands of computers. How does the data find the correct one?

The DHCP lease has an expiry time. So what happens when that lease is approaching its expiration date? What will the client do?

If you've got 500 computers, does that mean that you have to go and buy 500 public IP addresses?

DNS or the Domain Name System is something that a network simply couldn't exist without today.

DNS Name-Space Syntax is used to give us a fully qualified domain name.

Domain Name System, or DNS, is hosted by a DNS server.

When we're working on a computer network, we use the names of those computers to actually establish communication sessions with them.

What happens if we have the IP address of a computer, and we need the name of that computer?

Telnet is a Terminal Emulation program, which allows you to actually open up a remote sessions on a computer system over the network and work as if you were logged on locally.

An end of lesson summary of what was covered in this lesson.

A lot of the networking tools that we can work with, within Windows, are actually accessible through the command prompt, or the command-line interface.

Learn how to use traceroute, or tracert, for troubleshooting.

Address Resolution Protocol is the protocol that's responsible for mapping a computer's IP address to a MAC address.

Learn how to run NS lookup in interactive mode and non-interactive mode.

An end of lesson summary of what was covered in this lesson.

Learn how you can use the Control Panel to manage network settings.

The firewall exists to protect our internal machines from any unauthorized traffic.

Learn how you can put together a Windows Firewall rule using the GUI to enable access to the web server through the firewall.

Learn how you can put together a Windows Firewall rule using the command line to enable access to the web server through the firewall.

Learn how you can use the Control Panel to view connected devices.

The Device Manager allows you to look at device drivers, versions, how devices are connected and how to enable or disable devices.

Learn to manage printers and devices in the Control Panel.

If an application stops, somebody logs on or connects that computer over the network, all of this information can be found within the Event Viewer.

In Windows 7, Event Viewer is being modified. Learn how to use the newest version.

Learn how and why to clear an event log.

An end of lesson summary of what was covered in this lesson.

A brief introduction of what will be covered in this lesson.