先試後買

A. aggregate

B. multicast

C. anycast

D. static

A. local preference

B. community

C. AS path

D. next hop

E. origin

A. show ethernet-switching table

B. show route forwarding-table

C. show ethernet-switching table extensive

D. show route forwarding-table family ethernet-switching

A. The switch will shut down the offending port for five minutes.

B. The switch will shut down MAC learning on the offending port for five minutes.

C. The switch stops learning MAC addresses on the offending port, and any traffic to or from the offending MAC address will be dropped.

D. The switch stops learning MAC addresses on the offending port, but floods traffic out of all ports for the offending MAC address.

A. It only applies to OSPF external routes.

B. It is a route dynamically created based on the existence of one or more contributing routes in the routing table, often used for route summarization.

C. It cannot be redistributed into other protocols.

D. It is a static route created manually with a single next hop.

A. It is only displayed for static routes.

B. It has no effect on route selection.

C. It represents the administrative distance of the route, used to select the best route among multiple protocols advertising the same prefix.

D. It represents the BGP local preference attribute only.

A. Virtual Chassis members always require a dedicated management interface for the Virtual Chassis Control Protocol (VCCP).

B. Virtual Chassis allows multiple physical switches to be managed as a single logical device.

C. One member of the Virtual Chassis is elected as the master (primary) Routing Engine.

D. Virtual Chassis requires all member switches to be different hardware models.

A. to tunnel Ethernet frames

B. to eliminate broadcast storms

C. to route IP packets

D. to look up MAC addresses

A. Redundant trunk groups use spanning tree to provide loop-free redundant uplinks.

B. Redundant trunk groups load balance traffic across two designated uplink interfaces.

C. Layer 2 control traffic is permitted on the secondary link.

D. If the active link fails, then the secondary link automatically takes over.

A. TLVs are not required to support IPv4 reachability.

B. TLVs are required to support IPv6 reachability.

C. TLVs are required to support IPv4 reachability.

D. TLVs are not required to support IPv6 reachability.