Since the CWDM system does not use optical amplifiers, the focus of commissioning is whether the optical reception of the OTU board is reasonable.

• A.True
• B.False

Comment: *

Name: *

Email: *

Verification: *

What options are included in the role of the control word in PWE3?

• A.Fill the message to prevent the message from being too short
• B.Carry the sequence number forwarded by the packet
• C.Carrying Layer 2 frame header control information
• D.Carry MPLS labels

Comment: *

Name: *

Email: *

Verification: *

Which of the following descriptions about the possible reasons for PTN upgrade loading or activation failure are correct?

• A.Board initialization failed
• B.After the loading is completed, the active/standby switchover is performed
• C.AISCA loads the A2SCA software package
• D.Insufficient space on the CF card

Comment: *

Name: *

Email: *

Verification: *

Which of the following statements about 100G coherent PDM-QPSK modulation is incorrect?

• A.PDC-QPSK supports DCMfree and DCM system applications, and supports smooth upgrade from existing 10G/40G network to 100G system.
• B.PDM polarization multiplexing technology is adopted, which has better nonlinear tolerance than
  40GePDM-BPSK.
• C.The essence of QPSK modulation is to reduce the baud rate of the optical signal by half without reducing the line rate by selecting 4 possible values in the phase of the optical field.
• D.PDM-QPSK technology is the main modulation code technology for 100G transmission, which can reduce the line rate of 112Gb/s to the baud rate of 28Gbaud/s, greatly reducing the loan requirements for (optical) electrical devices.

Comment: *

Name: *

Email: *

Verification: *

When the PTN equipment configures the CBS parameters of QoS, the value affects which items are described correctly

• A.The smaller the CBS, the greater the delay in forwarding the packet.
• B.CBS used to describe the capacity of the token bucket C bucket
• C.The smaller the CBS, the less data is allowed to burst
• D.The larger the CBS, the more packets are allowed to burst

Comment: *

Name: *

Email: *

Verification: *