Exam 4: Telecommunications and Networking

Broadband refers to a network with transmission capacity of less than 4 megabits per minute.

Systems that use digital subscriber lines (DSL)do not require modems.

The benefits of e-learning include which of the following?

_____ signals convey information in wave form, whereas _____ signals convey information in binary form.

_____ refers to the range of frequencies available in any communications channel.

An extranet is a network that uses Internet technologies and is designed to serve the information needs of a single organization.

A(n)_____ connects parts of the intranets of different organizations and allows secure communications among business partners.

Gal runs a music store. He has a desktop computer in the back room that acts as a server. He has a point-of-sale terminal that connects to the desktop. He also has a notebook (using in-store wireless access to the Internet)that can be carried around the store to look up current items in stock, or to search for items from one of his suppliers for special orders. Which device(s)require network interface cards?

Which data transmission technology requires fiber-optic cable, can transmit up to 2.5 gigabits per second, and is more expensive than DSL?

Gal runs a music store. He has a desktop computer in the back room that acts as a server. He has a point-of-sale terminal that connects to the desktop. He also has a notebook (using in-store wireless access to the Internet)that can be carried around the store to look up current items in stock, or to search for items from one of his suppliers for special orders. Which of the following statements is true?

Digital signals are continuous waves that transmit information by altering the characteristics of the waves.

The cable medium with the highest bandwidth is ___________.

Which of the following statements concerning packet switching is not true?

A _____ allows a device to physically connect to a local area network's communications medium.

_____ portals offer content for diverse communities and are intended for broad audiences.

An Internet service provider is a company that offers Internet connections for a fee.

BitTorrent uses a process called _____, which eliminates file-sharing bottlenecks by having everyone share little pieces of a file at the same time.

With Voice-over-IP, every call opens up a dedicated circuit for the duration of the call.

Cable media use wires or cables to transmit data and information.

The _____ is a global wide-area network that connects approximately 1 million organizational computer networks.