FILL IN THE BLANKS If 10.20.8.20 is a host\'s Class-C IPv4 address and 255.255.2

Question

FILL IN THE BLANKS

If 10.20.8.20 is a host's Class-C IPv4 address and 255.255.255.248 is its subnet mask, then the host's subnet address in dot-decimal representation should be (BLANK) (do not include any spaces, or you will lose credit). Besides this host, (BLANK) more hosts can be connected in this subnet and each has its own IP address. If the owner of this IP address has a total of 20 hosts, then, without subneting, she will waste (BLANK) addresses, not including the network address itself and the broadcast address.

Explanation / Answer

Dear Student,

Here is the answer...

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If 10.20.8.20 is a host's Class-C IPv4 address and 255.255.255.248 is its subnet mask, then the host's subnet address in dot-decimal representation should be 10.20.8.16.

Explanation: If we want to find out the subnet address if the IP address and the mask is given then we do AND operation between IP address and Subnet Mask.

10.20.8.20   = 00001010.00010100.00001000.00010 100

255.255.255.248       = 11111111.11111111.11111111.11111 000

AND operation                = 00001010.00010100.00001000.00010000

                                = 10.20.8.16          Ans..

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Besides this host, 6 more hosts can be connected in this subnet and each has its own IP address.

Explanation: After subnetting ony 3 bits are left. So 23 = 8 -2 = 6 hosts

NOTE: 2 host are reserved one for network address and another for braodcast address.

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If the owner of this IP address has a total of 20 hosts, then, without subneting, she will waste 256-20-2 = 234 addresses, not including the network address itself and the broadcast address.

Explanantion: Class C network has 28 = 256 hosts.

hence she needs only 20 host and 2 reserved for network address and broadcast address.

hence total waste hosts   = 256 - 20 - 2 = 234 Hosts        Ans...

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Kindly Check and Verify Thanks....!!!

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