Question

In: Computer Science

Given an IP address 138.112.25.60, with the mask 255.255.255.240: Calculate the network address and broadcast address...

Given an IP address 138.112.25.60, with the mask 255.255.255.240:

  1. Calculate the network address and broadcast address of the network it belongs to.

  2. For 138.112.25.47 and 38.112.25.49, which one is in the same network as 138.112.25.60 does, and which one is not. Show the necessary calculation steps and explanation.

Solutions

Expert Solution

IP address is 138.112.25.60, In binary 10001010.01110000.00011001.00111100

The mask is 255.255.255.240 or /28

Calculate network address:

10001010.01110000.00011001.00111100 [IP address]

11111111.11111111.11111111.11110000 [Mask]

__________________________________

10001010.01110000.00011001.00110000 [Bitwise ANDing]

Or 138.112.25.48 in decimal

Therefore, network address 138.112.25.48

Calculate network address:

Set last four bits of the IP address to 1's

10001010.01110000.00011001.00111111   

Or 138.112.25.63 in decimal

IP address: 138.112.25.47,  In binary 10001010.01110000.00011001.00101111

Calculate network address:

10001010.01110000.00011001.00101111 [IP address]

11111111.11111111.11111111.11110000 [Mask]

__________________________________

10001010.01110000.00011001.00100000 [Bitwise ANDing]

Network address is 138.112.25.32

Since network address is different from 138.112.25.48, not in same network as 138.112.25.60

**********************************************************************************************************

IP address: 38.112.25.49,  In binary 00100110.01110000.00011001.00110001

Calculate network address:

00100110.01110000.00011001.00110001 [IP address]

11111111.11111111.11111111.11110000 [Mask]

__________________________________

00100110.01110000.00011001.00110000 [Bitwise ANDing]

Network address is 38.112.25.48

Since network address is different from 138.112.25.48, not in same network as 138.112.25.60

venereology answered 2 years ago
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