In the case of SNCP, a line board selectively receives services. Therefore, the SNCP can protect the services on the line.
A. TRUE
B. FALSE
Which of the following are the main advantages of SDH? (Multiple Choice)
A. Standard interfaces
B. Synchronous multiplexing
C. Powerful OAM
D. High compatibility
The fiber core refractive index n1 must be ( ) the cladding layer refractive index n2, which is a necessary condition for transmitting optical signals in optical fibers.
A. higher than
B. lower than
C. equal to
On the NMS, the NE performance monitoring time is set to () minutes and () hours,
A. 15, 12
B. 15, 24
C. 30, 12
D. 30, 24
If a network port that supports auto-negotiation is connected to a network port that does not support auto-negotiation, the half-duplex and full-duplex modes may be interconnected.
A. TRUE
B. FALSE
Which of the following statements about the EFS4 board are correct? (Multiple Choice)
A. This board has four FE ports.
B. This board supports Layer-2 switching.
C. This board must be used together with a processing board.
D. The board interface an LC interface.
The management scope of an OMSn is the path from the input optical port on a multiplexer unit at the transmit site to the output optical port on a demultiplexer unit at the receive site, which is called an optical multiplexing section (OMS) path.
A. TRUE
B. FALSE
Which of the following statements about extended ECC is incorrect?
A. Extended ECC is classified into automatic extended ECC and extended ECC in specified mode.
B. Automatic extended ECC indicates using a straight-through cable to connect the Ethernet ports of two NEs.
C. Extended ECC in specified mode indicates that the server and client need to be specified.
D. Automatic extended ECC can be enabled on a maximum of four NEs. In manual extended ECC mode, each server can be connected to a maximum of three clients.
For the OSN 3500, there is a slot mapping relationship between processing boards and interface boards. The processing board in slot 1 maps to the interface board in slot 19-20.
A. TRUE
B. FALSE
On the OSN series transport devices, Ethernet ports cannot access tagged frames and untagged frames at the same time.
A. TRUE
B. FALSE
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