how do i calculate masks, sub networks??? i need to know how it's done, not software like ip calc etc.
2007-01-16 20:33:43 · 7 answers · asked by Alexander 1 in Computers & Internet ➔ Computer Networking
The mask is a block on the numbers 255 is a total block for the octet. 255.255.255.128 blocks all numbers but the last 128 of which you can not use 0 or 255 so that leaves 126 free.
The number of IP's allow is deterimed by the group that issues ip's to you. Therefore you mask all but what you are allow.
Sub masks are a little too tricky to brief here. Cisco.com has reading on masking and subnetting.
2007-01-16 20:50:56 · answer #1 · answered by Carl P 7 · 0⤊ 0⤋
Knowing the IP/mask number in both human form and binary form is handy for calculation. Critical if it was network planning, handy if it was network troubleshooting.
The IP and mask are both 32-bit except if you go on IPv6 setup. IPs, for the purpose of simplify human understanding are segmented into A B C classes, but it became a nuisance if you finished studying introductory courses.
One popular corporate subnet range is 24.x.x.x with a basic mask of 255.0.0.0 anyone knows a little bit can say it is class A with 255^3 machines in one range, everything is right except one range is wrong. Putting 255.192.0.0 in pure binary and put a proposed class A IP in pure binary, AND them bit by bit and you got the sub network octet range label. All masks in binary form exibits a simple regular expression of ^1+0+$ no exceptions.
2007-01-16 21:35:27 · answer #2 · answered by Andy T 7 · 0⤊ 0⤋
what's the given ip address and how many networks and hosts are there? do you have a particular problem given? maybe i can help.. i know some subnetting and vlsm (supernetting)
2007-01-16 20:45:10 · answer #3 · answered by mel 2 · 0⤊ 0⤋
clcik at the website below and see fre etutorials and information on TCP IP, hope this helps u
http://www.freewebtown.com/darfun/tutorials/tcp-ip.html
2007-01-19 22:08:50 · answer #4 · answered by Anonymous · 0⤊ 0⤋
There are lots of software and website teaching this...
here are some links, but search google you will find many...
http://www.subnetmask.info/
http://jodies.de/ipcalc
http://www.subnet-calculator.com/
2007-01-16 21:08:27 · answer #5 · answered by Anonymous · 0⤊ 0⤋
dont really get u
2007-01-16 20:40:34 · answer #6 · answered by Victoria A 1 · 0⤊ 0⤋
hi
Dont worry about it.
2007-01-16 20:46:13 · answer #7 · answered by pawan b 2 · 0⤊ 0⤋