Which monitor session command captures only outbound (tx) VLAN 3 traffic on GigabitEthernet0/3 while ignoring other VLANs?
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Correct answer: monitor session 2 source interface gigabitethernet0/3 tx monitor session 2 filter vlan 3.
Why this is the answer
The command monitor session 2 source interface gigabitethernet0/3 tx specifies that the monitoring session (session 2) should capture traffic transmitted (tx) from GigabitEthernet0/3. The subsequent command monitor session 2 filter vlan 3 then refines this capture to include only traffic belonging to VLAN 3. This combination precisely meets the requirement of capturing only outbound VLAN 3 traffic. Option A is incorrect because it specifies rx (receive) traffic, not tx (transmit/outbound). Option B is incorrect because it uses rx and attempts to filter by excluding all VLANs except 3, which is an inefficient and incorrect way to achieve the goal, and still uses rx. Option D is incorrect because while it uses tx, its filter attempts to exclude all VLANs except 3, which is overly complex and not the direct method to include only VLAN 3.
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