1350O MS-SDH中的网络保护架构（NPA）是通过定义（）而创建组成的 物理连接。 网元/节点。 拓扑环。 子网。
Two routers configured to run BGP have been connected to a firewall， one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer， including the correct BGP session endpoint addresses and the correct BGP session hop-count limit （EBGP multihop）. What is a good first test to see if BGP will work across the firewall？（） Attempt to TELNET from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If telnet works， BGP will work， since telnet and BGP both use TCP to transport data.。 Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them， BGP should work， since BGP uses IP to transport packets.。 There is no way to make BGP work across a firewall without special configuration， so there is no simple test that will show you if BGP will work or not， other than trying to start the peering session.。 There is no way to make BGP work across a firewall.。
暂时硬度。
盒式诱变
In PIM-SM what control plane signaling must a multicast source perform before it begins to send multicast traffic to a group？（） The source must send a PIM Register message to the rendezvous point （RP）。 The source must first join the multicast group using IGMP before sending。 The source must perform a Request to Send （RTS） and Clear to Send （CTS） handshake with the PIM designated router （DR）。 No control plane signaling needs to be performed；the source can simply begin sending on the local subnet。
弹簧的作用是使分离（）消除因支撑处存有间隙前后旷动而产生的噪声。
