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

If all OSPF routers in a single area are configured with the same priority value,what value dose a router use for the ODPF router ID in the absence of a loopback interface?（）

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

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

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

A router receives information about network 192.168.10.0/24 from multiple sources.What will the router consider the most reliable information about the path to that network?（）

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

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?（）

Which cisco ios command can help to determine the timing of various debug events,relative to each other,when you are debugging a complicated router issue?（）

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?（）