Which command encrypts all plaintext passwords?（）

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

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

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?（）

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

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

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

On which options are standard access list based?（）

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?（）

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