Networking - Subnetting - Discussion

Discussion Forum : Subnetting - Subnetting (Q.No. 1)
Your router has the following IP address on Ethernet0: Which of the following can be valid host IDs on the LAN interface attached to the router?
1 only
2 and 3 only
3 and 4 only
None of the above
Answer: Option
The router's IP address on the E0 interface is, which is This makes the third octet a block size of 2. The router's interface is in the 2.0 subnet, and the broadcast address is 3.255 because the next subnet is 4.0. The valid host range is 2.1 through 3.254. The router is using the first valid host address in the range.
35 comments Page 3 of 4.

Nikhil said:   8 years ago
How did we get the subnet mask as

Akira said:   8 years ago
Can you please explain this from the scratch?

Neeraj said:   8 years ago NID. FIRST VALID HOST. LAST VALID HOST. BROAD CAST. it's not a valid address.

Between in these option valid address is

Davit said:   9 years ago

IP starts from 2.1 and ends with 3.254. So we can't use these numbers. It means we can use - I think so:x.

Felix said:   9 years ago
The valid host range will be (172.16,2.1-

The network address :

The broadcast address: 172,16.3.255.

The network will ends then it will become which is still on the range of the network.

Gabe said:   9 years ago
Don't know if it helps but and are kinda off from the default gateway notice that to there?

Varun tyagi said:   9 years ago
2 is the block size.

So 0, 2, 4, 6 is N.ID.

0.1, 0.2, 0.3 to 1.254 are host.


2.1, 2.2, 2.3, 2.4 to 2.254, 2.255, 3.1, 3.2 to 3.254 are host.

But 3.255 are and 4.0

Santhosh said:   10 years ago
The valid host id is from to [excluding this is itself routers id)].

And the broadcast add is

Aishwarya mishra said:   10 years ago
The valid host id is from to [excluding this is itself routers id)].

And the broadcast add is [here we are making all the last nine bits as 1.].

Aswathy said:   1 decade ago
I think the valid host IDs are between to

And broadcast address is

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