宽带接入技术-阶段2作业答案（国外英文资料）.docVIP

宽带接入技术-阶段2作业答案（国外英文资料） (10 short questions, 50.0 points) Self-healing network (Self - ranging network) is without human intervention, the network can be in a very short period of time the business carried by automatic recovery from failure, users do not feel there is something wrong with the network has, its basic principle is to make the network have found alternative transmission route and re-establish communication ability. correct error Knowledge: phase 2 [A;] Score: [5] test score: 5.0 Tip: Multiplexing and multi-access technologies can be distinguished by the presence of a multiplexer on the user side. correct error Knowledge: phase 2 [A;] Score: [5] test score: 5.0 Tip: The main form of the topology of the HFC network is the use of the star structure in the dry-wire network, and the wiring network adopts the tree structure. correct error Knowledge: phase 2 [A;] Score: [5] test score: 5.0 Tip: The VDSL operates at a symmetric or asymmetric rate, with a maximum rate of 52Mbit/s. correct error Knowledge: phase 2 [B] Score: [5] test score: 5.0 Tip: The main standard for ADSL is the g.d.mt and G.l ite standards. correct error Knowledge: phase 2 [A;] Score: [5] test score: 5.0 Tip: The three duplex hosted channel LS0, LS1, LS2, one of which is the control channel (C channel), which is valid for all transmission levels. correct error Knowledge: phase 2 [A;] Score: [5] test score: 5.0 Tip: PON mainly USES active optical power distributor (couplers) to send information to all users. correct error Knowledge: phase 2 [B] Score: [5] test score: 5.0 Tip: In the atu-r, there are seven sending channels, four of which receive the channel, and three duplex channels. correct error Knowledge: phase 2 [B] Score: [5] test score: 5.0 Tip: DSLAM is a DSLs access multiplexer. correct error Knowledge: phase 2 [A;] Score: [5] test score: 5.0 Tip: The g.d.mt standard is g. 992.1, with the lowest downward transmission rate of 1.536 Mbps, up to 640kbps. correct error Knowledge: phase 2 [