Well Roswell1329 that makes two of us that are apparently stupid, cos i was thinking the same thing as yourself!Quote:
Ive just started learning TCP/IP, so looks like ive got a LOT to learn!
Regards
r3b00+
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Well Roswell1329 that makes two of us that are apparently stupid, cos i was thinking the same thing as yourself!Quote:
Ive just started learning TCP/IP, so looks like ive got a LOT to learn!
Regards
r3b00+
I know this is an older thread but this is a good site for novices learning to subnet. I think it could be very helpful to learn the basics and beyond. It contains multiple lessons in Windows Media format and really explains things well I think.
www.learntosubnet.com
A few points :
Subnetting is for routing and traffic control and to give you more available addresses to assign your machines from the few you may only have from your original network id !
As for those taking Cisco, you should really understand ip addressing already as it should be a pre-requisite ! I used to teach CCNA and CCNP courses as well as a plethora of Microsoft courses and Comptia to name a few !
But there is plenty of inormation available on google as well as i the previos threads on that subject and in the tutorials section !
And dont get despondent as there is no such thing as a bad student only a bad teacher.
And the only difficult question is the one you dont know the answer too.
A good deal subnetting is explained in TCP/IP Illustrated by W.R.Stevens(volume 1).Its a nice book for any one wanting to learn TCP/IP .
There are three Subnetting tutorials posted on this website, I wrote one of them. If you want me to e-mail you the copy of the lesson I teach for my class I can do that as well.
The main thing that confuses most people about subnetting is that there is a network mask and then an added subnet mask. Also, DON'T THINK IN DECIMAL, if you look at it in binary subnetting is much clearer. Routers use binary not decimal or hexidecimal. The binary in the first octet tells you what class you are dealing with. This tells you the required Network Mask and how many Octets are out of your control. It also reveals how many octets you do control and those are the octets you can sub-net.
Never forget you always lose 2 networks and two hosts when you subnet since all 0's and all 1's are reserved for broadcast and multicast. Interestingly enough the best description of subnetting I have ever read in a book, and the one that answered my questions clearly, was in a Novell CNE study guide. The number of networks is 2^n-2 where n is the number of 1's in your subnet mask (do not include the network mask) and the number of hosts is the same but n represents the number of 0's in your sub-net mask.
When teaching networking though the most common hang ups I run into are those I just mentioned: You must convert to binary and learn masking in binary then see what it looks like in decimal, you must realize that there is a network mask and a seperate sub-net mask, you must know the formula 2^n-2 to find the number of networks and hosts on your SUB-NET mask (do not include the network mask portion in this calculation). Subnet masking is confusing at first but it is not really difficult if you learn the binary reason why it works. Like I said I have tutorial on here as well as two others that approach the problem slightly differently. If you want my full write up I use in class I will be glad to send it to you just PM me.