What is the class of the following IP addresses?

Question

207.30.0.0/16

192.168.4.0/24

129.120.40.0/24

is it independent of subnet mask ????

Answer 1

Well the /16 and /24 give you the answers

The first one by the octet 207 is in the class C range BUT with

A /16 is class B allowing 65534 hosts with a subnet mask of 255.255.0.0

The next next one 192.x.x.x/24 octet is Class C  254 hosts with a subnet mask of 255.255.255.0

The last one is 129 which is a Class B octet but using a class C mask /24 which is 255.255.255.0

No this is not independent of the subnet mask, the /16 and /24 set the subnet information by the number of bits.

To see how all this works visit the following sites

http://www.subnet-calculator.com   you can enter subnets by mask or bits.

http://learntosubnet.com  for a full course that is very complete.

Answer 2

Here are some sites to learn and practice subnetting:

http://easysubnet.com/

http://subnettingquestions.com

Answer 3

the slash notation tells you the subnet mask.

/24 is 255.255.255.0

/16 is 255.255.0.0

Answer 4

It looks more like from a VPN or some independent class.

The IP cannot be independent of subnet mask, it must be in some category for sure.