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

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

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?（）

Which statement describes the rule of split horizon?（）

Which command encrypts all plaintext passwords?（）

A network administrator is trying to add a new router into an established OSPF network.The networks attached to the new router do not appear in the routing tables of the other OSPF routers.Given the information in the partial configuration shown below,what configuration error is causing this problem?（）Router(config)#router ospf 1Router(config-router)#network 10.0.0.0 255.0.0.0 area 0

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

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

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

On which options are standard access list based?（）