Solution
The correct answer is A assumes, B is on same network, but B assumes, A is on a different network
Given Information:
- Computer A:
- IP Address: 203.197.2.53
- Subnet Mask: 255.255.128.0
- Computer B:
- IP Address: 203.197.75.201
- Subnet Mask: 255.255.192.0
Step 1: Calculate the Network Address for A
1. Convert the Subnet Mask to Binary:
- Subnet Mask A: 255.255.128.0
- In binary: 11111111.11111111.10000000.00000000
2. Convert the IP Address to Binary:
- IP Address A: 203.197.2.53
- In binary: 11001011.11000101.00000010.00110101
3. Perform Bitwise AND:
- Network Address A:
Step 2: Calculate the Network Address for B
1. Convert the Subnet Mask to Binary:
- Subnet Mask B: 255.255.192.0
- In binary: 11111111.11111111.11000000.00000000
2. Convert the IP Address to Binary:
- IP Address B: 203.197.75.201
- In binary: 11001011.11000101.01001011.11001001
3. Perform Bitwise AND:
- Network Address B:
Summary of Network Addresses:
- Network Address A: 203.197.0.0
- Network Address B: 203.197.64.0
Step 3: Determine Network Assumptions
- For Computer A (203.197.2.53):
- It calculates its network address as 203.197.0.0.
- It considers Computer B (203.197.75.201) as being on the same network if the IP falls within the same network address range.
- For Computer B (203.197.75.201):
- It calculates its network address as 203.197.64.0.
- Since 203.197.2.53 does not fall within the range of 203.197.64.0, it assumes that A is on a different network.
Conclusion
- Computer A assumes that Computer B is on the same network.
- Computer B assumes that Computer A is on a different network.
Thus, the correct option is indeed: 3) A assumes B is on the same network, but B assumes A is on a different network.
