Which dose the frame-relay interface-dlci command configure?（）

单项选择题Which command can be a router to verify the layer 3 path to a host?（）

A. traceroute address
B. tracert address
C. ssh address
D. telnet address

单项选择题A company has a small network,consisting of a single switch and a single router.The switch has been configured with two vlans,and route-on-a-stick is being configured on the router for inter-vlan routing.A trunk is configured to connect the switch to the router.What is the minimum number of router subinterfaces that are required for all the vlans to communicate?（）

A. one
B. three
C. two
D. zero

单项选择题A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24 29.which statement explains the reason for this issue?（）

A. The address is a broadcast address
B. The Ehernet interface is faulty
C. VLSM-capable routing protocols must be enable first on the router.
D. This address is a network address.

单项选择题What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?（）

A. lowest port MAC address
B. port priority number and MAC address.
C. VTP revision number
D. highest port priority number.
E. path cost

单项选择题Assuming default setting,how can you erase the VTP database of VLANs on a CISCO IOS switch running in VTP server mode?（）

A. Enable VTP pruning
B. From privileged mode ,erase the startup configuration file,then reload.
C. From privileged mode ,erase the vlan date file, then reload.
D. Cycle the switch power.