Exam 9: Communications and Networks

Data transmitted on a ring network like the one shown in the accompanying figure travels from device to device around the entire ring, in both directions.

____________________ is a newer network standard developed by IEEE that specifies how wireless devices communicate over the air in a wide area.

Some services use which of the following terms to refer separately to the capability of sending video clips?

COGNITIVE ASSESSMENT What communications type enables real-time typed conversation among two or more people that takes place on a computer connected to a network?

COGNITIVE ASSESSMENT Which of the following communications technologies does not use broadcast radio signals?

On a network such as the one illustrated in the accompanying figure, what kind of computer controls access to the hardware, software, and other resources on the network and provides a centralized storage area for programs, data, and information?

The ____________________ standard specifies that computers and devices on the network share or pass a special signal, called a token, in a unidirectional manner and in a preset order.

COGNITIVE ASSESSMENT Which company was formed when Bell Atlantic acquired GTE in 2000?

On a token ring network, a packet is a special series of bits that function like a ticket, allowing the device with the packet to transmit data over the network.

Which of the following is a central communications device that allows computers and devices to transfer data wirelessly among themselves or to transfer data wirelessly to a wired network?

Mobile TV provides television programs over the cellular network.

COGNITIVE ASSESSMENT What is the definition of a protocol, as it applies to networks?

A voice mailbox plays which of the following roles in a voice mail system?

Home networking saves the home user money and provides many conveniences.

For best performance of a communications channel, which of the following should be true?

For radio transmissions, a transmitter is needed to send the broadcast radio signal and a receiver to accept it.

Which of the following is true of the installation of a network like the one shown in the accompanying figure?

Which of the following is a coffeehouse or restaurant that provides computers with Internet access to its customers?

Which of the following kinds of modems is a digital modem that sends and receives digital data over the cable television (CATV) network?

COGNITIVE ASSESSMENT In reference to computer communications, what does the term noise mean?