A network administrator needs to configure a serial link between the main office and a remote location.The router at the remote office is a non-cisco router. How should the network administrator configure the serial interface of the main office router to make the connection?（）

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

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

Which command is used to display the collection of OSPF link states?（）

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

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

Which statement describes the rule of split horizon?（）

An administrator must assign static IP addresses to the servers in a network.For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address. Which of the following should be entered into the IP propertied box for the sales server?（）

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

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