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

Which command encrypts all plaintext passwords?（）

How are VTP advertisements delivered to switches across the network?（）

Which protocol reduces administrative overhead in a switched network by allowing the configuration of a new VLAN to be distributed to all the switches in a domain?（）

Which command displays the CHAP authentication process as it occurs between two routers?（）

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

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

Which name describes an IPV6 host-enable tunneling technique that uses IPV4 UDP,does not require dedicated gateway tunnels,and can pass through existing IPV4 NAT gateways?（）

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?（）

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?（）