IP addressing

How do they using 14 bits for the network instead of first 16bits.  My understanding is class B hold 255.255.0.0 which is first 16 bit for the network.

yes , its a class B network and 2 unused IP's are set aide for broadcast. Whats wrong with it
Read the Theory good good before making questions.

Makana
CCNA-4

I don't see where you (or they) are getting 14 bits for the network. 255.255.0.0 = 16 network bits.

thats
11111111+11111111+00000000+00000000
=16
So? where the problem is for you?

Thanks I got it now.

The first two  bit is reserved in class B. So there is only 14 bits. That is what i was asking.

Correction: 2 IPs are set aside, one for Network ID and another for Broadcast Address.

In a classful world, the first 2 bits could be used to determine the class,

01 = A
10 = B
11 = C

These days it's pretty much classless everywhere (in more ways than one)  so it doesn't really matter.

Cheers,

Gary

>Number of hosts = 2^n - 2 = 2^16-2 = 65534. I got this part.

>Number of network = 16384. I am not quit sure how did they got this part!

Looks like your networks are approx 25% of your hosts - to me this would possibly mean that it is assumed that the smallest network consists of four address (network, broadcast, and two host addresses).  So, divide your hosts by four and you get the number of maximum possible "networks".

Cheers,
-Jon

http://jodies.de/ipcalc tells all you want to know about your IP address...

Thanks nirma242. It is pretty good website.