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

A network administrator needs to configure a serial link between the main office and a remote location.The router at the remote office is a non-cisco router. How should the network administrator configure the serial interface of the main office router to make the connection?（）

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?（）

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

An administrator must assign static IP addresses to the servers in a network.For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address. Which of the following should be entered into the IP propertied box for the sales server?（）

What is the default administrative distance of OSPF?（）

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

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

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