A.PROG

B.SRV

C.ACT

D.STAT

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.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.

D.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.

A.Routing loops prevent packets from reaching their destination correctly and cause link congestion

B.Routing loops may occur when different routing domains import routes from each other

C.The packet is routed circularly between two or more routers until the TTL is reduced to 0 and discarded

D.Routing loops can only be generated by dynamic routing protocols

A.155G

B.58.75G

C.80G

D.35G