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Question ID 15242

According to OSI reference model, Layer 2 LAN switch operates at ( ).

Option A

 Physical layer

Option B

 Data link layer

Option C

IP layer

Option D

 Application layer

Correct Answer B
Explanation


Question ID 15243

According to the STP protocol, a certain field in the BPDU identifies the root switch. That is,
if the BPDU sent by a switch contains this field, this switch is considered as the root switch.
What is this field?

Option A

 Root Identifier

Option B

Root Path Cost

Option C

Bridge Identifier

Option D

 Port Identifier

Correct Answer A
Explanation

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