Compared with dense wavelength division multiplexing (DWDM) systems, crude glass division multiplexing (CWDM) systems provide a certain amount of glass length and transmission distance within (kmkm), which greatly reduces system cost and has strong flexibility
Which of the following statements about the MSP ring is correct? (Multiple choice).
SDH signals must be scrambled before they can be transmitted over optical fibers. Which of the following bytes is not scrambled? (Multiple choice).
STM-64 has an () AU pointer.
The receiver performs a BIP-8 check on unscrambled STM-16 frames. If the BIP8 check result XOR·∶, the value of the B1 byte contained in the next STM16 ring is 10001100, which indicates STM-16 There is a () bit False block in the axis.
EPL services use ports and bandwidth exclusively, and different users may need to share resources. Which of the following methods can be used to isolate user data?
When configuring VLAN-based service types, which of the following features must be enabled on the port?
In MSP networking, when the optical fiber is connected between sites, the east light plate of the site is connected to the west light plate of the downstream site, and these stations are connected in turn to form a ring. In this case, the direction from the toko plate of the site to the wine light plate of the downstream station is the direction of the main ring, and the direction of forming the ring is the direction of service.
Fiber loss includes bending loss, absorption loss and scattering loss.
TU-AIS is often encountered during network maintenance. Which of the following alerts can trigger a TU-AIS alert? (Multiple choice).
