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21 votes
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Which of the following is NOT true with respect to a transparent bridge and a router?

  1. Both bridge and router selectively forward data packets

  2. A bridge uses IP addresses while a router uses MAC addresses

  3. A bridge builds up its routing table by inspecting incoming packets

  4. A router can connect between a LAN and a WAN

2 Answers

Best answer
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47 votes
  1. Both bridge and router selectively forward data packets $\Rightarrow$ True.
    Bridge can drop packets not meant for other side, so can router.

  2. A bridge uses IP addresses while a router uses $\text{MAC}$ addresses $\Rightarrow$ False .
    A bridge operate at layer $2$ (data link layer) so it uses $\text{MAC}$ address,
    while router at layer $3$ (network layer) so it using IP addresse

  3. A bridge builds up its routing table by inspecting incoming packets $\Rightarrow$ True.
    Self Learning Bridges

  4. A router can connect between a $\text{LAN}$ and a $\text{WAN} \Rightarrow$ True.
    Router connecting home $\text{LAN}$ To internet !

Correct Answer: $B$

edited by
3 votes
3 votes
ans b)
Answer:

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