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

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

Three switches are connected to one anther via trunk ports.Assuming the default switch configuration,which switch is elected as the root bridge for the spanning-tree instance of vlan 1?（）

Which encapsulation type is a Frame Relay encapsulation type that is supported by Cisco routers?（）

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

On which options are standard access list based?（）

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 network administrator is planning a network installation for a large organization.The design requires 100 separate subnetworks,so the company has acquired a Class B network address.What subnet mask will provide the 100 subnetworks required, if 500 usable host addresses are required per subnet?（）

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 statement describes the rule of split horizon?（）