A.A single ring has a maximum of 64 nodes, supporting tangent/intersecting multiple topologies

B.The line bandwidth can reach 20G, and support smooth switching to 40G

C.MRPS+SNCP dual-plane protection, far less than 50ms protection switching

D.Unified service bearer, TDM service and Ethernet service are independently forwarded and bearer

A.OSN1800

B.OSN8800

C.OSN6800

D.OSN9800

A.TRUE

B.FALSE

A.The OTN backbone network in prefectures and cities began to consider the use of single-wave 100G to build two planes

B.Single-wave 10G scenarios are generally constructed using a station-by-station electrical relay method

C.A large number of single-wave 10G network construction is used, and single-wave 100G has not yet been applied on a large scale

D.The construction of national and provincial cadres has basically been completed, and there is no large-scale construction in prefectures and cities.

A.2022

B.2020

C.2019

D.2021