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?（）

After the show ip route command has been entered,the follwing routes are displayed.Which route will not be entered into the routing table of a neighboring router?（）

You have been asked to come up with a subnet mask that will allow all three web servers to be on the same network while providing the max number of subnets.Which network address and subnet mask meet this requirement?（）

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

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

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

What is the purpose of the cisco Vlan Trunking protocol?（）

While troubleshooting a network problem,a technician discovers that the current copy of the Cisco IOS is outdated and needs to be updated.Which of the following commands would the technician issue to replace the Cisco router IOS with the newer version?（）

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

Which statement describes the rule of split horizon?（）