me test series

Question

Consider station “A” send data to station “B”. Data frame contain MAC address, IP address and port address. Which of the following address may change on intermediate router.

Destination IP address

Destination MAC address

Source MAC address

Source IP address

Comments

Source and destination MAC addresses keep on changing every hop.

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can u explain how do they keep on changing

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For every hop, the mac addresses are modified by sender. It sets source mac to it's own mac and sets destination mac to where it is supposed to go (The mac add of the next router or host,etc) from there.

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okk but initially when packet is sent by sender  when it does not know its mac it will put its source mac as 0 that too would be modified by routers