Which subnet (network address) does host 25.17.102.51 255.255.248.0 belong to?

Expert Solution

Given,

Host IP Address : 25.17.102.51

First octet value in Host IP address is 25 which indicates that host belongs to class A . Class A ranges from (1 - 127) in the first octet.

In class A, Network ID contains 8 bits and Host ID contains 24 bits. For subnetting biits from Host ID are used.

Subnet Mask : 255.255.248.0

In binary representation it is :11111111.11111111.11111 000.00000000

All 1's indicates Network ID part which is 21 bits. It means 13 bits are borrowed from Host ID. Therefor total number of subnets = 2¹³ = 8192 subnets.

Host ID part is all 0's which is 11 bits. Therefore, number of hosts for subnet = 2¹¹ = 2048 hosts/ subnet

Total number of usable hosts = 2048 - 2 = 2046 hosts / subnet.

Address: 25.17.102.51 ===> 00011001.00010001.01100 110.00110011
Netmask: 255.255.248.0 = 21 ===> 11111111.11111111.11111 000.00000000

Subnet 0 :

Network: 25.17.96.0/21 ===> 00011001.00010001.01100 000.00000000 (Class A)
Broadcast: 25.17.103.255 ===> 00011001.00010001.01100 111.11111111
HostMin: 25.17.96.1 ===> 00011001.00010001.01100 000.00000001
HostMax: 25.17.103.254 ===> 00011001.00010001.01100 111.11111110

Therefore, Host 25.17.102.51 belongs to first subnet i.e, Subnet0. as it is in the range of (25.17.96.1 - 25.17.103.254 )

venereology answered 2 hours ago

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