The device that acts as a connection point between computers and can filter and forward data to a specified destination is called a(n)

• hub

• switch

• router

• NIC

• modem

The Internet is based on which three key technologies?

• TCP/IP, HTML, and HTTP

• TCP/IP, HTTP, and packet switching

• client/server computing, packet switching, and the development of communications standards for linking networks and computers

• client/server computing, packet switching, and HTTP

• e-mail, instant messaging, and newsgroups

Which of the following is not a characteristic of packet switching?

• Packets travel independently of each other.

• Packets are routed through many different paths.

• Packet switching requires point-to-point circuits.

• Packets include data for checking transmission errors.

• Packets are reassembled into the original message when they reach their destinations.

In TCP/IP, IP is responsible for

• disassembling and reassembling of packets during transmission.

• establishing an Internet connection between two computers.

• moving packets over the network.

• sequencing the transfer of packets.

• breaking messages down into packets.

A(n) ________ is a device that forwards packets of data through different networks, ensuring that the data gets to the right address.

• modem

• router

• packet

• telnet

• hub

A network that covers entire geographical regions is most commonly referred to as a(n)

• local area network.

• intranet

• peer-to-peer network.

• wide area network.

• MAN.

Bandwidth is the

• number of frequencies that can be broadcast through a medium.

• number of cycles per second that can be sent through a medium.

• difference between the highest and lowest frequencies that can be accommodated on a single channel.

• total number of bytes that can be sent through a medium per second.

• geographical distance spanned by a network.

Digital subscriber lines

• operate over existing telephone lines to carry voice, data, and video.

• operate over coaxial cable lines to deliver Internet access.

• are very-high-speed data lines typically leased from long-distance telephone companies.

• have up to twenty-four 64-Kbps channels.

• are assigned to every computer on the Internet.

The child domain of the root is the

• top-level domain.

• second-level domain.

• host name.

• domain extension.

• mid-tier domain.

Together, a protocol prefix, a domain name, a directory path, and a document name, are called a(n)

• URL

• IP address.

• third-level domain.

• root domain.

• child domain.