目前，学校与社区关系和互动已形成了许多方式，如：（）。 学校向社区开放。 请“社区委员会”参与全面评价学校工作。 鼓励学生到社区进行实地调研，促使公众关注学校。 学校组织服务队为社区服务。
在点对点的基本配置中，站A和站B之间有4个波长业务，在一次维护中发现B站的某个SDH设备产生了R-LOS告警，而其它波长业务正常，可能会有哪些原因所导致（） A站WBA输出光纤断开。 A站SDH设备到TWC的接头松动。 B站D16对应中断业务的波长的输出口光纤挤压过度。 线路光纤折断。
Which three of these are major components of an MPLS VPN network？ （） LDP notification。 L2TPv3 session。 VPN route target communities。 Multiprotocol BGP peering of PE routers。 MPLS forwarding。
While troubleshooting a network， you need to verify the liveness of hosts in the subnet 192.168.1.64/26. All of the hosts are able to reply to ping requests. How would you confirm the existing nodes using one single command？（） ping 192.168.1.255。 ping with sweep option。 ping 192.168.1.127。 ping 192.168.1.64。 ping with broadcast optio。
Which three statements describe the configuration change management feature in DCNM LAN？ （） Switch profiles allow configurations to be synchronized between switches and are supported with any Cisco NX-OS Software managed device.。 DCNM LAN can archive configurations from devices even if they are not managed by the DCNM server， and the administrator can supply the device management IP address and credentials.。 You can archive a maximum of 50 configuration versions per managed device.。 Managed devices must be licensed in DCNM LAN before they can be used with configuration change management.。 Device-running configuration will be archived only if it differs from the last archived version.。
1850 TSS-320支持的时钟状态有（）
