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

Which command encrypts all plaintext passwords?（）

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

Three switches are connected to one anther via trunk ports.Assuming the default switch configuration,which switch is elected as the root bridge for the spanning-tree instance of vlan 1?（）

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

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

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

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?（）

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?（）

A router receives information about network 192.168.10.0/24 from multiple sources.What will the router consider the most reliable information about the path to that network?（）