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Terms in this set (50)
digital
Communication signals represented in a binary format are said to be _________.
bit
Each zero and one signal represents a _________.
computer
Which of the following is NOT an analog device?
analog
Signals such as sound and temperature, which continuously vary in strength and quality, are said to be
modem
The ________ is a device that converts digital computer signals into analog signals so that they can be sent over a telephone line.
modem
A person sending a document over a phone line by converting digital signals to analog signals uses a ________.
network
A ________ is a system of interconnected computers, telephones, or communications devices that can communicate and share resources.
WAN
A network that covers a wide geographical area is called a _________.
MAN
A network that covers a city or a suburb is called a ________.
HAN
A ________ uses wired, cable, or wireless connections to link a household's digital devices.
peer to peer
Networks are structured in to principles ways: client/server and _________.
peer-to-peer
A network that operates without relying on a server is the _______ network.
file
A computer that acts like a disk drive, storing the programs and data files shared by users on LAN is the ________ server.
intranet
If an organization's internal private network uses the same infrastructure and standards of the Internet, then the private network is a(n) _________.
company intranet, company extranet, company LAN
A virtual private network may include _________.
protocol
A _______ is the set of rules that govern the exchange of data between hardware and/or software components in a communications network.
host
A mainframe computer that controls a large network is called the _________ computer.
node
Any device that is attached to a network is referred to as a _________.
packet
A _________ is a fixed-length block of data or transmission.
hub
A common connection point of devices on a network is called a _________.
Gateway
To create larger networks, a bridge connects the same types of networks, and a _________ connects dissimilar networks.
backbone
In an organization, all computer networks are connected to the Internet by a _________.
router
A special computer that directs communicating messages among several connected networks is a _________.
Gateway
Dissimilar networks communicate via an interface called a _______.
hub
Which of these is NOT a network topology?
ring
What kind of topology (layout) is used by a network that connects all computers and communications devices in a continuous loop?
bus
In the ______ network topology, communications devices are connected to a single cable with two endpoints.
star
What kind of topology (layout) is used by a network that connects all its computers and communications devices to a center server?
Ethernet
_________ is the most common and most widely used LAN technology; it can be used with almost any kind of computer, most microcomputers come with a port for this type of network connection.
twisted-pair
A communications medium is a channel; there are three types of wired communications media. The one consisting of two strands of insulated copper wire, used by tradition telephone systems, is known as ________.
coaxial
What wire channel, commonly used for cable TV, consists of an insulated copper wire wrapped in a solid or braided shield placed in an external cover?
Ethernet, HomePNA, HomePlug
A type of wired communications technology used to connect equipment in a home network is the following:
fiber-optic
What wired communications medium consists of dozens or hundreds of then strands of glass or plastic?
telecommuting; telework
_________ is working form home: _______ is working from anywhere.
electromagnetic spectrum
The _______ is the basis for ALL telecommunications signals
bandwidth
The ________ is the range of frequencies that a transmission medium (channel) can carry in a particular period of time.
WAP
What set of rules is used to link nearly all mobile devices to a telecommunications wireless network?
virtual office
Which of the following is NOT a type of wireless communications media?
broadcast radio
What form of wireless transmission sends data to an AM or FM receiver?
microwave
Which of these types of wireless transmission is limited to line-of-sight communications?
uplinking
Transmitting a signal from a ground station to a satellite is called
geostationary earth orbit
The highest level that a satellite can occupy in space is known as _______.
GEO
GPS uses satellites orbiting at a(n) ________ level; they transmit timed radio signals used to identify earth locations.
analog cellphone
The _________ is a 1G device that is designed primarily for communications by voice through a system of ground-area cells about 8 miles or less in diameter.
Bluetooth
Which of the following is NOT a type of long distance wireless two-way communications device?
third
Broadband technology is also referred to as ________-generation wireless services
Wi-Fi
What short-distance wireless standard is used to link portable computers and handheld wireless devices so they may communicate at high speeds at distances of 100-228 feet?
Bluetooth
What short-distance wireless standard is used to link cell phones, PDAs, and computers at distances of up to 30 feet?
denial-of-service
A _______ attack disables a computer system or network by making so many requests of it that it overloads it and keeps other users from accessing it.
worm
A _______ is a program that copies itself repeatedly into a computer's memory or onto a disk drive.
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