Teen Programmers Unite  
 

 

Return to forum top

subnet mask?

Posted by have_dinner [send private reply] at November 27, 2001, 08:33:11 PM

what is it? why are they always 255.255.255.0 ????? where can i find info on this?

Posted by grandsnafu [send private reply] at November 27, 2001, 08:46:24 PM

If I understand right (probably not), it tells what subnet to look under for other machines connected to your network. So, if you assign IPs of 192.168.1.* to every machine on the network, your subnet is 255.255.255.0. But if you assign IPs of 192.168.*.*, your subnet is 255.255.0.0. Check out google, or any networking webpage. They should have more info. A lot of linux books (if you own any) seem to have a little information, too.

Posted by CodeRed [send private reply] at December 03, 2001, 10:14:46 AM

The third octal is what subnet your under, the last octal is your address in that subnet. 255.255.255.0 means your network is not subnetted. Subnetting divides networks into logical groups at the expense of a couple of IP's

Posted by taubz [send private reply] at December 03, 2001, 05:45:12 PM

I don't think that's correct. I believe it's a bitwise mask indicating which bits in your IP determine the subnet. EX: (SubnetMask Logical-And YourIP) = YourSubnet.

- taubz

Posted by CodeRed [send private reply] at December 03, 2001, 10:26:35 PM

perhaps, dammit, my memory is horrible. I'm a CCNA for f**ks sake and I can't even remember how to subnet ):

You must be logged in to post messages and see which you have already read.

Log on
Username:
Password:
Save for later automatic logon

Register as a new user
 
Copyright TPU 2002. See the Credits and About TPU for more information.