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?（）

Three access ports have been installed and configured to a small office.What term defines the wireless topology?（）

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

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

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

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?（）

How are VTP advertisements delivered to switches across the network?（）

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 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?（）

At which layer of the OSI model is RSTP used to prevent loops?（）