Which of the following standards must be met for the isolation test in the feature test of the multiplexer/ demultiplexer?
A. <20dB
B. >25dB
C. >20dB
D. <25dB
Which of the following is approximately equal to 100mw?
A. 13dBm
B. 20dBm
C. 15dBm
D. 10dBm
Before querying bit errors and optical power on the U2000, you need to perform the ( ) operation. Otherwise, the corresponding data cannot be queried.
A. Enabling the NE Performance Monitoring Time
B. Creating the logical fiber
C. Synchronizing NE data
D. Configuring data
In a WDM system, after a distance of transmission, the OSNR of the signals at the receive end decreases to a certain extent. Which of the following is the main cause?
A. Use of EDFA
B. The fiber attenuation is too large.
C. New optical fiber is not used.
D. Use of Demultiplexer Multiplexer
Which of the following is not a PW APS switching condition?
A. A warm reset is performed on the board.
B. The board software is faulty.
C. MPLS_PW_SF
D. A cold reset is performed on the board.
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 of the signal in the board? ( )
A. 80 Bytes
B. 84 Bytes
C. 64 Bytes
D. 68 Bytes
If OCh trails fail to be created by trail, which are the possible causes?
A. There are still alarms that are not cleared on the boards involved in the OCh.
B. The wavelength settings at the source and sink ends are inconsistent.
C. Some fibers are not connected.
D. There is no server trail.
If tunnel APS is configured for the tunnel to which the PW belongs, PW APS cannot be configured for the PW.
A. True
B. False
When creating new NE,which of the following Configuration Mode can be selected?
A. Initialize and Manually Configure NE Data
B. Download
C. Upload
D. Copy NE Data
MPLS tunnel APS protection supports multiple types of command switching and has different priorities. Which of the following command switching types has the highest priority?
A. Locked Switching
B. Practice Switching
C. Force Switching
D. Manual Switching