What are two characteristics of L2 circuits? (Choose two.)

Question

Options

• ARouting instance configuration is required for L2 circuits to function
• BRouting instance configuration is not required for L2 circuits to function
• CBGP is required for L2 circuits to function
• DBGP is not required for L2 circuits to function

• A
  17% (3)
• B
  78% (14)
• C
  6% (1)

Explanation

B: You configure Layer 2 VPNs in a routing instance. As a result, Layer 2 VPNs have unique site and VPN identifiers. However, Layer 2 circuits do not require a routing instance configuration and instead use an alternate method of identifying circuits. D: Layer 2 VPNs, like Layer 3 VPNs, require Border Gateway Protocol (BGP) for transport of traffic between PE routers. In contrast, Layer 2 circuits do not require BGP. Instead, Layer 2 circuits rely on LDP and MPLS for their operation.

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