1.Introduction to Data Communication

There are ______________ Internet service providers.

• regional
• local
• national and international
• all of the above

______ refers to the physical or logical arrangement of a network.

• Topology
• Mode of operation
• Data flow
• None of the above

A ______ is a data communication system spanning states, countries, or the whole world.

• MAN
• WAN
• LAN
• none of the above

A _______ connection provides a dedicated link between two devices.

• primary
• multipoint
• point-to-point
• secondary

Which topology requires a multipoint connection?

• Bus
• Star
• Mesh
• Ring

A ________ is a set of rules that governs data communication.

• protocol
• forum
• standard
• none of the above

In a ______ connection, two and only two devices are connected by a dedicated link.

• multipoint
• point-to-point
• (a) and (b)
• none of the above

The information to be communicated in a data communications system is the _______.

• Medium
• Protocol
• Message
• Transmission

________ defines how a particular pattern to be interpreted, and what action is to be taken based on that interpretation.

• Syntax
• Semantics
• Timing
• None of the above

Frequency of failure and network recovery time after a failure are measures of the _______of a network.

• Performance
• Security
• Reliability
• Feasibility