Exam 6: Telecommunications and Networks

_____ is a system of transferring money from one bank account directly to another without any paper money changing hands.

A geostationary satellite orbits the earth at an altitude of less than 1,000 miles.

_____ is a common form of guided transmission media that uses extremely thin strands of glass bound together in a sheathing and transmits signals with light beams.

_____ is a developing network wireless communications frequently used in security systems for sensing and controlling energy-consuming devices.

A _____ satellite system employs many satellites that are spaced so that, from any point on the Earth at any time, at least one satellite is on a line of sight, each in an orbit at an altitude of less than 1,000 miles.

Sending an email over the Internet is an example of an asynchronous communication.

One way to help protect the security of communications over both wired and wireless networks is to _____.

An advantage of a packet-switching network is that data arrives in exactly the same order in which it is sent.

With _____, processing devices are placed at various remote locations, and each device is isolated and does not communicate with any other processing device.

The area covered by one or more interconnected wireless access points is commonly called a(n) _____.

With distributed processing, processing devices are placed at remote locations but are connected to each other via a network.

A(n) _____ is a network device that serves as an entrance to another network.

In a _____, all network devices are connected to a common backbone that serves as a shared communications medium.

A personal area network (PAN) is a wireless network that connects information networking devices within a small area, such as an office, home, or several floors of a building.

What is the National Do Not Call Registry. How does it work?

With synchronous communications, the receiver gets a message after some delay-a few seconds to minutes or hours or even days after the message is sent.

A digital subscriber line (DSL) delivers high-speed Internet access to homes and small businesses over the existing phone lines of the local telephone network.

The global positioning system (GPS) uses satellites as reference points to calculate positions on Earth to an accuracy of a few yards or even less.

Cellular transmission uses radio waves, and hence cellular phone conversations are extremely secure. ​

A client is any computer on a network that sends messages requesting services from the servers on the network.