Chapter 07: Computer Networks Flashcards
Analog signals
A type of signal where the data is represented by continuous waves.
antenna
A device used for receiving or sending radio signals; often used to increase the range of a network.
Bluetooth
A networking standard for very short-range wireless connections; the devices are automatically connected once they get within the allowable range.
bridge
A device used to bridge or connect two LANs; most often used to connect wired devices wirelessly to a network.
Bus network
A network consisting of a central cable to which all network devices are attached.
cellular (cell) phone
A mobile phone that communicates via a cellular network; also called a cell phone.
Cellular radio
A form of broadcast radio designed for use with cellular telephones that broadcasts using antennas located inside honeycomb-shaped cells.
Coaxial cable
A networking cable consisting of a center wire inside a grounded, cylindrical shield, capable of sending data at high speeds.
Communications satellites
An earth-orbiting device that relays communications signals over long distances.
computer network
A collection of computers and other hardware devices that are connected together to share hardware, software, and data, as well as to communicate electronically with one another.
digital signals
A type of signal where the data is represented by 0s and 1s.
dual-mode phones
A mobile phone that can be used with more than one communications network, such as with both a cellular and a Wi-Fi network.
Ethernet (802.3)
A widely used wired LAN networking standard.
extranet
An intranet that is at least partially accessible to authorized outsiders.
Fiber-optic cable
A networking cable that utilizes hundreds of thin transparent fibers over which lasers transmit data as light.
global positioning system (GPS)
A system that uses satellites and a receiver to determine the exact geographic location of the receiver.
infrared (IR) transmission
A wireless networking medium that sends data as infrared light rays.
intranet
A private network that is set up similar to the Internet and is accessed via a Web browser.
local area network (LAN)
A network that connects devices located in a small geographical area, such as within a building.
Mesh network
A network in which there are multiple connections among the devices on the network so that messages can take any of several possible paths.
metropolitan area network (MAN)
A network designed to service a metropolitan area.
Microwave stations
An earth-based device that sends and receives high-frequency, high-speed radio signals.
Mobile phones
A phone, such as a cellular or satellite phone, that uses a wireless network.
modem
A device that enables a computer to communicate over analog networking media, such as to connect that computer to the Internet via telephone lines.
network adapter
A network interface, such as an expansion card or external network adapter.
network interface card (NIC)
An expansion card through which a computer can connect to a network.
parallel transmission
A type of data transmission in which bytes of data are transmitted at one time, with the bits in each byte taking a separate path.
personal area network (PAN)
A network that connects two or more of an individual’s personal devices when they are located close together.
range extenders
A repeater for a wireless network.
Repeaters
A device on a network that amplifies signals.
router
A device that connects multiple networks together; routes packets to their next location in order to efficiently reach their destination.
satellite phone
A mobile phone that communicates via satellite technology.
serial transmission
A type of data transmission in which the bits in a byte travel the same path one after the other.
Star network
A network that uses a host device connected directly to several other devices.
switch
A device used to connect multiple devices on a single (typically wired) network; forwards packets to only the intended recipient.
TCP/IP
A networking protocol that uses packet switching to facilitate the transmission of messages; the protocol used with the Internet.
telecommuting
The use of computers and networking technology to enable an individual to work from a remote location.
Telemedicine
The use of networking technology to provide medical information and services.
telesurgery
A form of robot-assisted surgery in which the doctor’s physical location is different from the patient’s and robot’s physical location; the doctor controls the robot remotely over the Internet or another network.
TransferJet
A networking standard for very short-range wireless connections between devices; devices need to touch in order to communicate.
twisted-pair cable
A networking cable consisting of wire strands twisted in sets of two and bound into a cable.
Ultra Wideband (UWB)
A networking standard for very short-range wireless connections among multimedia devices.
Videoconferencing
The use of computers, video cameras, microphones, and networking technologies to conduct face-to-face meetings over a network.
virtual private network (VPN)
A private, secure path over the Internet that provides authorized users a secure means of accessing a private network via the Internet.
Wi-Fi (802.11)
A widely used networking standard for medium-range wireless networks.
Wi-Fi Direct
A standard for connecting Wi-Fi devices directly, without using a router or an access point.
wide area network (WAN)
A network that connects devices located in a large geographical area.
WiGig (802.11ad)
An emerging fast, short-range wireless networking standard expected to be used for transferring large amounts of data from one device to another.
WiMAX (802.16)
A wireless networking standard that is faster and has a greater range than Wi-Fi.
wired network
A network in which computers and other devices are connected to the network via physical cables.
wireless access point
A device on a wireless network that connects wireless devices to that network.
wireless network
A network in which computers and other devices are connected to the network without physical cables; data is typically sent via radio waves.
wireless router
A router with a built-in wireless access point; most often used to connect wireless devices to a network and an Internet connection and often contains a built-in switch.
wireless USB
A wireless version of USB designed to connect peripheral devices.
WirelessHD (WiHD)
A wireless networking standard designed for very fast transfers between home electronic devices.
