not being the quickest of people to subnet etc could any advise on this theory i read in another post.
am trying to apply it but it i dont think it that clear.
thanks in advance
Hi, I might have a solotion for you in finding more time during your exam.
Subnetting should cost you 10 sec a question there are some 10 questions about subnetting so that would not cost you more then 2 minutes. Subnetting in 10 seconds?
yes its simple.
Write down the bitnumbers of the last 2 octets and the sequence of 128 64 etc.
for example give me the subnet and broadcastadress of 18.104.22.168/22
it's simple look at the table 22 is step 4
Divide 61 by step 4 and multiply the WHOLE NUMBER 15 by step 4 the subnet is 60 next subnet is 60 plus step 4 = 64 so broadcastadress is 63.255 (B-class)
61/4=15*4=60 next subnet 64 so subnet is 63.255
or 22.214.171.124/19 look at the table. 19 is step 32
61/32=1*32 subnet= 32 next subnet is 32+32=64 so broadcast is 63.255