Exam 9: Wide Area Networks

_____ are dedicated digital circuits that are the most commonly used form of dedicated circuit services in North America today.

Virtual private networks permit users to create permanent virtual circuits, or tunnels, through the Internet.

MPLS operate at layer 4.

The data rate for a T-3 circuit in North America is:

_____________ is a common standard for use by layer 2 access VPNs for encapsulation.

In constructing Wide Area Networks, many organizations do not build their own long distance communication circuits.

The committed information rate (CIR)) in a permanent virtual circuit is the maximum allowable rate that the network will attempt to provide.

Each state or Canadian province has its own ___________ to regulate communications within its borders.

Suppose you joined a company that had a WAN composed of SONET, T carrier services, and frame relay, each selected to match a specific network need for a certain set of circuits. Would you say this was a well-designed network? Explain.

_____________ is sometimes called a Layer 2.5 technology.

Common carriers sell or lease communication services and facilities to the public.

A _______ is a connectionless method of sending data packets on a packet switched service.

A _________ is a connection-oriented approach to sending packets on a packet switched service.

Using a chart format, list, define and briefly describe two dedicated circuit services and two packet switched services.