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

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

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?（）

On which options are standard access list based?（）

What is the default administrative distance of OSPF?（）

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

What is the subnetwork address for a host with the IP address 201.100.5.68/28?（）