Thursday 29 November 2012

Based on the diagram shown below, what is the correct addressing for a frame and packet received by Host TestKingB from Host TestKingA?

Refer to the following exhibit:


A. Destination MAC: 0011.43da.2c98
Source MAC: 0070.0e8f.088a
Destination IP: 192.168.60.5
Source IP: 192.168.60.1
B. Destination MAC: 0011.43da.2c98
Source MAC: 0070.0e8f.088a
Destination IP: 192.168.60.5
Source IP: 192.168.24.5
C. Destination MAC: 0011.43da.2c98
Source MAC: 00b0.d0ef.5f6a
Destination IP: 192.168.60.5
Source IP: 192.168.24.5
D. Destination MAC: 0011.43da.2c98
Source MAC: 0070.0e97.af4e
Destination IP: 192.168.60.5
Source IP: 192.168.60.2
E. None of the above

Answer: B

Explanation:

When packets leave from the host, the packets contains the source MAC and IP of the
host address. The source and destination IP address will not change. Because the host
knows that the destination is on another subnet, it will forward the packet to the default
gateway device, so the destination MAC address will be of the default gateway, which is
the FA0/0 interface of router TestKing3.

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