Study tips 640-802

When configuring a serial interface on a router, what is the default encapsulation?

What must be set correctly when configuring a serial interface so that higher-level protocols calculate the best route?

What is the most likely reason for this?

Which layer in the OSI reference model is responsible for determining the availability of the receiving program and checking to see if enough resources exist for that communication?

To fix this issue, at which layer should the troubleshooting process begin?

Which protocols are found in the network layer of the OSI reference model and are responsible for path determination and traffic switching?

What is the difference between a CSU/DSU and a modem?

What would be the most efficient way to configure MAC-level security on all these ports?

Which command reveals the last method used to powercycle a router?

Which three options are valid WAN connectivity methods?