The TAG attribute cannot be set for the internal port VCTRUNK of the board on the NMS.

• A.FALSE
• B.TRUE

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If the overhead bytes pass through the backplane bus between two slots, the two slots are called paired slots.
Paired slots implement automatic transparent transmission of overhead bytes, such as (),(), and (). This improves MSP switching performance and protects DCC communication with other NEs even if the SCC board on the local NE is offline. (Multiple Choice)

• A.E1 byte
• B.D byte
• C.K byte
• D.B1 byte

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Which of the following are the steps for multiplexing low-speed services into high-speed SDH services?
(Multiple Choice)

• A.Alignment
• B.Mapping
• C.Multiplexing
• D.Overhead insertion

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When the LCAS function is used/ which of the following overhead bytes are used to transmit control information? (Multiple Choice)

• A.M1
• B.K4
• C.K2
• D.H4

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EPL services exclusively use ports and bandwidths, and different users may need to share resources. Which of the following methods can be used to isolate user data?

• A.VLANID
• B.QinQ technology
• C.All of the above
• D.MPLS label

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