CODEWITHSUNDEEP
subnet
Msinger
Msinger

Reputation: 59

Subnetting, how do you find the Ip range , and subnetMask ?

If you have Subnet A with a network address of 172.25.100.0 and you need 1100 hosts . You also have Subnet B with a network address of 192.168.105.0 and you need 70 , find the subnet masks, and IP rage for both networks.

I don’t know how do this can someone please explain that process

Upvotes: 0

Views: 238

Answers (2)

CustomX
CustomX

Reputation: 10113

I'll add an explanation which isn't in bits. For Subnet A you need 1100 hosts, a /24 provides 255 addresses. A /23 provides 512 addresses. A /22 provides 1024 addresses. So we will need a /21 which provides 2048 addresses (2046 usable).

For Subnet B we need 70 hosts. Again, a /24 provides 255 addresses, a /25 provides 128 addresses and a /26 provides 64 addresses. So we will need a /25 with 128 addresses (126 usable).

Upvotes: 1

saurabh baid
saurabh baid

Reputation: 1877

If you 1100 hosts then you would need atleast 11 bit as a host bit so remaining 21 bit represent your subnet mask. So your subnet mas would be 11111111.11111111.11111000.00000000 which would be 255.255.248.0.

Similarly for 70 hosts you would need 7 bits for host addresses and 25 bits for network so 255.255.255.128 would be the subnet mask.

Upvotes: 0

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