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?（）

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?（）

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?（）

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

What is the default administrative distance of OSPF?（）

Which command encrypts all plaintext passwords?（）

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?（）

On which options are standard access list based?（）

At which layer of the OSI model dose PPP perform?（）