Computer Networks Exam Questions and Answers Chapter 7 Graded A+

Computer Networks Exam Questions and Answers Chapter 7 Graded A+ Analog Signals - Answers A type of signal where the data is represented by continuous waves Antenna - Answers A device used for receiving or sending radio signals; often used to increase the range of a network Bluetooth - Answers Wireless PAN technology that transmits signals over short distances between cell phones, computers, and other devices Bridge - Answers A device used to bridge or connect two LANs; most often used to connect wired devices wirelessly to a network Bus network - Answers A network that uses a central cable to which all network devices connect. Cell phone - Answers A mobile phone that communicates via a cellular network Cellular radio - Answers a form of broadcast radio that is used widely for mobile communications; broadcasts using antennas located inside honeycomb-shaped cells Coaxial cable - Answers A networking cable consisting of a center wire inside a grounded, cylindrical shield, capable of sending data at high speeds Communications sattelite - Answers An earth-orbiting device that relays communications signals over long distances Computer network - Answers 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 - Answers A type of signal where the data is represented by 0s and 1s Dual-mode phone - Answers A mobile phone that can be used with more than one communications network, such as with both a cellular and Wi-Fi network Ethernet (802.3) - Answers A widely used wired LAN networking standard Extranet - Answers An intranet that is at least partially accessible to authorized outsiders Fiber-optic cable - Answers A networking cable that utilizes hundreds of thin transparent fibers over which lasers transmit data as light Global Positioning System (GPS) - Answers A system that determines the precise position of something on Earth through a series of satellites, tracking stations, and receivers. Infrared transmissions - Answers a wireless networking medium that sends data as infrared light rays Intranet - Answers A private network that is set up similar to the Internet and is accessed via a web browser Local Area Network - Answers A network that connects communications devices in a limited geographical region, such as a building, so that every user device on the network can communicate with every other device. Mesh network - Answers A network consisting of a central cable to which all network devices are attached Metropolitan area network (MAN) - Answers A network designed to service a metropolitan area Microwave station - Answers An earth-based device that sends and receives high-frequency, high-speed radio signals Mobile phone - Answers A phone, such as a cellular or satellite phone, that uses a wireless network Mobile WiMAX (802.16) - Answers An emerging wireless networking standard that is faster and has a greater range than Wi-Fi. Modem - Answers A device that enables a computer to communicate over analog networking media, such as connecting to the Internet via telephone lines. Network interface card (NIC) - Answers An expansion card through which a computer can connect to a network Network adapter - Answers A network interface, such as an expansion card or external network adapter Parallel transmission - Answers 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) - Answers A network that connects an individual's personal devices that are located close together Range extender - Answers A repeater for a wireless network Repeater - Answers A device on a network that amplifies signals Router - Answers A device that routes packets between networks based on network-layer addresses; determines the best path across a network. Also are used to connect separate LANs to form a WAN. Satellite phone - Answers A mobile phone that communicates via satellite technology Serial transmission - Answers A type of data transmission in which the bits in a byte travel the same path one after the other Star network - Answers A network that uses a host device connected directly to several other devices Switch - Answers A device used to connect multiple devices on a single (typically wired) network; forwards packets to only the intended recipient