Some questions

[18Googol2]

Hi. I get stuck with 2 problems regarding subnetting, plz help me out:

1. Given the subnet mask of 255.255.252.0 and 1024 hosts per subnet, find the number of bits borrowed and the class of the license.

The book's answer is class A, but I have no idea why class B is not accepted.

2.Given the subnet broadcast of 255.223.255.255 and subnet mask of 255.224.0.0, find the bits borrowed, subnet address for the subnet to which the host belongs, and the usable host range of the subnet.

How can the subnet broadcast start with 255? Its class E address and not usable

[Archangel122184]

Generally we do not help with homework. Since you have already tried the problem and have your own answer I will try to guide you or explain.

1.) Thats a good question. Anything in the third octet is a class B (from 255.255.0.0 to 255.255.254.0, before is class A, after is class C. Of course, argumentatively, class C is included in class B and class B is included in class A.

2.)

First, class E is unusable by convention, there is actually nothing physically wrong with it. Also, the universal broadcast is 255.255.255.255. This is what bootstrap protocols like DHCP use since they have no networking information to go off of.

You've already figured out what the network is so just go from that and ignore the fact it violates address standards.