INTERVIEW QUESTIONS NETWORKING DETAILS

Question: Given a Class B Network with subnet mask of 255.255.248.0 and a packet addressed to 130.40.32.16, what is the subnet address?

Answer: Take the 2 addresses, write them in binary form, then AND them. The answer is 130.40.32.0

Take the 2 addresses, write them in binary form, then AND them. The answer is 130.40.32.0 Source: CoolInterview.com

The answer should be 130.40.32.0

The subnet address in the IP address with the network address and without host bits. To find it we do an AND operation between the IP address and the subnet mask.

Converting 130.40.32.16 to binary:

10000010.00101000.00100000.00010000

Converting the subnet mask 255.255.248.0 to binary:

11111111.11111111.11111000.00000000

ANDing the two binaries we get:

10000010.00101000.00100000.00000000

Back to decimal we get: 130.40.32.0
Source: CoolInterview.com

Given a Class B Network with subnet mask of 255.255.248.0 and a packet addressed to 130.40.32.16, what is the subnet address?
Answers:

Take the 2 addresses, write them in binary form, then AND them. The answer is 130.40.32.0



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The answer should be 130.40.32.0

The subnet address in the IP address with the network address and without host bits. To find it we do an AND operation between the IP address and the subnet mask.

Converting 130.40.32.16 to binary:

10000010.00101000.00100000.00010000

Converting the subnet mask 255.255.248.0 to binary:

11111111.11111111.11111000.00000000

ANDing the two binaries we get:

10000010.00101000.00100000.00000000

Back to decimal we get: 130.40.32.0


Source: CoolInterview.com

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