The network administrator cannot to switch 1 over a telnet session,although the hosts attached to switch 1 can ping the interface Fa0/0 of the router.Given the information in the graphic and assuming that the router and switch2 are configured properly,which of the following commands should be issued on switch 1 to correct this problem?（）

At which layer of the OSI model is RSTP used to prevent loops?（）

What is the purpose of the cisco Vlan Trunking protocol?（）

What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?（）

An employee of ABC company has move to an office on a different floor. Although the administrator is able to telnet to all of the routers,the address of Switch F is needed in order to verify that the employee remains in the same VLAN.Which action could be used by the administrator to find the IP address of Switch F?（）

What is the subnetwork address for a host with the IP address 201.100.5.68/28?（）

After the show ip route command has been entered,the follwing routes are displayed.Which route will not be entered into the routing table of a neighboring router?（）

Which statement is true, as relates to classful or classless routing?（）

A router receives information about network 192.168.10.0/24 from multiple sources.What will the router consider the most reliable information about the path to that network?（）

Which pairing reflects a correct protocol-and-metric relationship?（）