Friday, April 30, 2010

Continued

The End. The rest of the chapter is just a more in depth explanation on troubleshooting a network. I don't really understand why it went through a quarter of the chapter with overly simple version and then an in-depth version. Also these posts have become harder to write due to the fact that the last chapter is just steps to do whatever and not actual concepts. But I will prevail!

So right now I'm reading about policies and regulations. Policies are basically what you do under certain circumstances like when a user is locked out of an account, a hacker breaks into your network or when a gia... nevermind. Procedures are procedures which you do when a policy comes into effect. Regulations are rules imposed by guvamnets and other organizations that your company must follow if you don't want to get hauled off to jail.

So this post has been sitting in my edit post section for a bit. Oh well here's some more stuff.

I went back to subnetting and I do understand it better than I did before, no thanks to the book BUT thanks to Ralph Becker's IP Address Subnetting Tutorial.

SMILE"

So an I.P. address is composed of two parts, the network address and the node address. If you have a Class A network the first octet is the network address and the last 3 the node address. A Class B network the first two octets are the network address and the last two are the node address. I hope you can guess what the Class C address is. When the node octets of the address are set to 0 you get the network address. When they're all set to 1 you get the broadcast address.

Now here is where I got caught up which is subnet masks. Mr. Elkner gave me an explanation of subnet masks and I will reiterate it for my own clarification. When you have a network address and you want more subnets than nodes you can apply a subnet mask to give yourself more subnets. So let's say you have the class B address 178.223.000.000. The first two octets are the network address. The last two are the host/node address. By applying a subnet mask you get more subnets. Everyone outside your network sees your network address but inside the network you have your own little system of subnets.

1 comment:

  1. If you hurry up and take the Net+ test, we can get a few machines together and you can setup a router that creates a few sub nets. Then you can experience sub netting first hand.

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