GMU IT 105 Final Exam Questions With
Correct Answers
The OSI model defines four layers used by computer systems to communicate over a network -
answer✔✔False
Random access files are the same as relative access files. - answer✔✔True
In computer hardware, a port is simply a connector at the end of a bus into which a device can be
plugged - answer✔✔True
The operating system provides I/O support services that can be used by every program. -
answer✔✔True
The wiring on the motherboard interconnects all of the peripheral cards that are plugged in to
connectors, together with circuitry that steers I/O to the CPU and memory. This arrangement is
known as a: - answer✔✔Backplane
A channel that carries messages in only one direction is known as a duplex channel. Page (256),
simplex, half-duplex, full-duplex - answer✔✔False
A full-duplex channel may carry messages in both directions, but only one direction at a time. -
answer✔✔False
An Intranet is an organizational network, where the user interfaces and applications are based
primarily on Web services. - answer✔✔True
Ethernet is called the Carrier Sense Multiple Access with Collision Detection (CSMA/CD)
protocol. - answer✔✔True
Ports are used in the Transport layer to identify the application that is to receive the message. -
answer✔✔True
There must be a way to break long messages into smaller units. These units are called segments -
answer✔✔False
The use of packets simplifies operations and increases communication efficiency. -
answer✔✔True
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