+1 vote
in Computer Networks by
Identify the netid and hostid of the IP Address given its subnet mask in binary. Show your solution.

1 Answer

+1 vote
by (user.guest)
selected by (user.guest)
Best answer

Generally networks are divided into netid and hostid, the netid  of a network identifies the network, while the host id states the host connected to the network. 

First thing needed in order to find the netid and the hostid of any given IP address, is to first figure out what class the IP address falls under, there are mainly 5 classes of IP addresses and these are the Class A,B,C,D,E. For the purpose of this question though, we would  focus on only class A and B and C

CLASS A:  Every IP address as we know is a dotted 32 bits octet, meaning that they are divided into 4 parts and each is made up of 8 bits. for example (AAA. BBB. CCC. DDD) each alphabet can be said to be 8 bits. now for class A networks the first octet ranges from 0 to 127. meaning that the IP address in the question ( is not a class A network.

CLASS B: The class B networks range from 128 to 191. meaning the IP address is also not of class B. 

CLASS C: The class C networks have a range from to, so clearly the IP address above is a class C address. 

So lets focus on the class C.

For the class C addressing scheme, the first 24 bits of the IP address is what defines the NetID , meaning that the net ID here is; 192.168.15 and the last 8 bits define the HostID so we have 187 as the HostID.

Related questions

+1 vote
1 answer 679 views
0 votes
0 answers 422 views
+1 vote
1 answer 280 views
asked Jul 13, 2021 in Computer Networks by anonymous
+1 vote
1 answer 227 views
+2 votes
3 answers 21.2k views
0 votes
1 answer 5.5k views
+2 votes
1 answer 443 views
asked Aug 10, 2020 in Computer Networks by anonymous
Welcome to CPENTalk.com
Solution-oriented students of computer engineering on one platform to get you that