[单选]

You are conducting a cdp-based discovery using an edge switch for the seed.  there is a router between the switch and the wlse.  none of the access points are discovered， and the discovery log shows the switch is snmp unreachable.
What is the problem？（）

肝盲囊是（）动物的消化器官。 A.文昌鱼 。 B.鲤鱼 。 C.鳄鱼 。 D.鲸鱼。 西戎 交易所交易基金 Which two options are benefits of the Cisco Technical Assistance Center?（） Increase the Performance of current Features。 Enhances network and/or application availability, reliability and stability。 Processes broad Expertise in Cisco technologies。 Provides rapid fault isolation in a complex environment, leading to quick resolutio。 Cisco IOS is the software used on the vast majority of Cisco Systems routers and current Cisco network switches. As a network administrator, you are required to configure MPLS on Cisco IOS. In such a situation, which three of the following steps are necessary to take?（） Start LDP.。 Enable CEF switching.。 Configure conditional label advertising.。 Enable label switching on frame mode interfaces.。 disable IP TTL propagation。 configure conditional label advertising。

You are conducting a cdp-based discovery using an edge switch for the seed.  there is a router between the switch and the wlse.  none of the access points are discovered， and the discovery log shows the switch is snmp unreachable.
What is the problem？（）