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

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?（）

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

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?（）

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

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?（）

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

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

What is the result of issuing the frame-relay map ip 192.168.1.2 202 broadcast command?（）