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?（）

Which device might be installed at a branch office to enable and manage an IPsec site-to-site VPN?（）

Three access ports have been installed and configured to a small office.What term defines the wireless topology?（）

Which Cisco IOS diagnostics command can disrupt the operation of a router under high-load conditions?（）

Which statement describes the rule of split horizon?（）

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

Which IPsec security protocol should be used when confidentiality is required?（）

At which layer of the OSI model dose PPP perform?（）

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?（）

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?（）