If the LED indicator value on the SCC board of the OSN 8800 T32 board is 11, which of the following is the subrack ID?

A. Slave subrack 2

B. Slave subrack 1

C. Slave subrack 17

D. Slave subrack 11

A and C are WDM OTM sites, and B is a regeneration site. If the ODU2_LCK signal is inserted at site A, which of the following statements are correct?

A. Site C reports a ODU2_PM_LCK minor alarm.

B. Site A reports a ODU2_PM_BDI minor alarm.

C. Site A reports a ODU2_PM_LCK minor alarm.

D. Site C reports a ODU2_PM_BDI minor alarm.

Which of the following statements about MPLS is wrong?

A. MPLS has two planes: control plane and forwarding plane. The control plane is connection-oriented, the forwarding plane is connectionless.

B. MPLS is not a service or application. It is a standard routing and switching platform that supports various upper-layer protocols and services.

C. In the packet transport field, the MPLS technology is mainly used to construct tunnels to carry various types of services (for example, TDM, ATM, and Ethernet) transmitted by PWE3 to implement end-toend transmission of services on packet networks.

D. MPLS packet forwarding is based on labels.

Which of the following statements about avoiding the generation of discrete trails are correct?

A. Use the trail function for configuration.

B. For services configured on a per-NE basis, search for trails on the NMS to ensure that the service configurations are complete and standard.

C. A fiber cut or switching test must be performed on the trail with protection routes to ensure that the configuration is complete and standard.

D. Guide users to learn service configuration specifications.

When the standard Ethernet frame whose length is 64 Bytes is accessed to the Ethernet board, if the QinQ function is enabled, what is the actual frame length if the signal in the board? ()

A. 80 Bytes

B. 84 Bytes

C. 64 Bytes

D. 68 Bytes