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

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?（）

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

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

An employee of ABC company has move to an office on a different floor. Although the administrator is able to telnet to all of the routers,the address of Switch F is needed in order to verify that the employee remains in the same VLAN.Which action could be used by the administrator to find the IP address of Switch F?（）

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

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

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?（）

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?（）

On which options are standard access list based?（）