SPEhosting, on 09 October 2012 - 17:01, said:
Hi basically I learnt sub-netting 8 months ago... didnt touch it after I now have to do subnetting theory.... yay... and I have forgotten everything.....
maybe help me out with a few examples ? one of the many things I have to do is this...
Address Class : __b__
Bits Borrowed for Subnet: ____8_____
Bits for Host: ____8_____
Number of Usable Subnets: _____253_____
Number of Usable Hosts/Subnet: _________
Network Address: ____________________
Usable Address Range: __________
Broadcast Address: ____________________
I have put in some numbers though I think I am extremely wrong..... can you help me with this one and explain then maybe I can do the rest my self?
Address Class : B
Bits Borrowed for Subnet: Class B is a 16-bit mask, but the SN above is a /24 so you borrowed 8 bits
Bits for Host: ____8
Number of Usable Subnets: 2^8 = 256 subnets
Number of Usable Hosts/Subnet: 32 bit address - 24 bit subnet address for a /24 = 8 bits for hosts -> 2^8 - 2 = 254 hosts per subnet
Network Address: 220.127.116.11/24
Usable Address Range: 18.104.22.168 to 22.214.171.124
Broadcast Address: 126.96.36.199
I'm pretty sure that's right... it's been a while since I passed my CCNA lol.