Implementing Cisco IP Switched Networks (CCNP SWITCH, legacy) — Question 40

Which two conditions must be met to establish a Layer 2 EtherChannel? (Choose two.)

Answer options

• A. The trunking protocol must be the same for all links in the EtherChannel
• B. SPAN must be disabled on the ports
• C. All ports in the EtherChannel must operate in half-duplex
• D. LAN ports in the EtherChannel must be contiguous
• E. All ports in the EtherChannel must be on the same module

Correct answer: A, B

Explanation

Option A is correct because all links in the EtherChannel need to use the same trunking protocol for proper operation. Option B is also correct as SPAN must be disabled on the ports to ensure that they can participate in the EtherChannel. Options C, D, and E are incorrect because they do not represent necessary conditions for establishing a Layer 2 EtherChannel.