单选题中兴MX20系统EGNE和GNE说法不正确的是（）A EGNE网关网元实现的载体是SNPB EGNE网关网元实现的载体是SOSCB/SOSCC GNE网关网元实现的载体是SOSCB/SOSCD EGNE监控的前提是EMS到EGNE网元的接入IP互通既可

A.EGNE网关网元实现的载体是SNP

B.EGNE网关网元实现的载体是SOSCB/SOSC

C.GNE网关网元实现的载体是SOSCB/SOSC

D.EGNE监控的前提是EMS到EGNE网元的接入IP互通既可

A.支持光监控信道，不支持电监控通道

B.网元内各个单板之间的通信通过IP方式实现

C.SPWA/B单板具有二层交换功能

D.SOSC当相当于一个路由器，并使用OSPF协议

A.中兴Abis口设计包含IP层和TCP，UDP，Cudp

B.PPP是为了在同等单元之间传输数据包而设计的

C.cUDP是压缩的用户datagram协议

D.中兴Abis口设计中不包括TCP/IP协议

A.NCP

B.SOSC

C.SPWA

D.SEIA

Click the Exhibit button. In the DCN connection shown in the exhibit, all non-GNE nodes are located on different subnets from the GNE. There are no static routes or external OSPF on any elements. CTC Workstation and GNE have Cisco Router as their default gateway.Can the CTC workstation see the entire SONET network?（）

A. Yes, but only if OSPF is enabled around the ring.

B. Yes, because the GNE will only serve as a proxy-ARP for elements on the same subnet.

C. Yes, but only if the router‘s address is entered as a static route in the non-GNE elements.

D. Yes, because the GNE will serve as a proxy-ARP for all elements, regardless of their subnets.

A.既支持光监控信道，也支持电监控通道

B.网元内各个单板之间的通信通过IP方式实现

C.SPWA/B单板具有二层交换功能

D.SOSCB当相当于一个路由器，并使用OSPF协议