flash cards

chapter 15

Question Answer
100BaseT An Ethernet standard that operates at 100 Mbps and uses twisted-pair cabling up to 100 meters (328 feet). Also called Fast Ethernet. Variations of 100BaseT are 100BaseTX and 100BaseFX.
Bandwidth In relation to analog communication, the range of frequencies that a communications channel or cable can carry. In general use, the term refers to the volume of data that can be transmitted on a bus or over a cable stated in bits per second (bps), kilobit
Base station A fixed transceiver and antenna used to create one cell within a cellular network.
bnc connector A connector used with thin coaxial cable. Some BNC connectors are T-shaped and called T-connectors. One end of the T connects to the NIC, and the two other ends can connect to cables or end a bus formation with a terminator.
bridge A device that stands between two segments of a network and manages network traffic between them
broadband A transmission technique that carries more than one type of transmission on the same medium, such as voice and DSL on a regular telephone line
cable internet A broadband technology that uses cable TV lines and is always connected (always up).
cable tester A tool used to test a cable to find out if it is good or to find out what type of cable it is if the cable is not labeled.
cat 3 A rating formally used for unshielded twisted-pair (UTP) cables on a network, and is currently used for phone lines.
cat 5 rating used for unshielded twisted-pair (UTP) cables and is rated for Fast Ethernet, but is seldom used today.
cat 5e A rating used for unshielded twisted-pair (UTP) cables, rated for Fast Ethernet and Gigabit Ethernet, and is popular today.
cat 6 A rating used for twisted-pair cables that has less crosstalk than CAT-5e cables. CAT-6 cables might contain a plastic cord down the center of the cable that helps to prevent crosstalk, but is less flexible and more difficult to install than CAT-5e.
cat 6a
cat 6e An unofficial name for CAT-6a.
cat 7 A rating used for twisted-pair cables that have shielding to almost completely eliminate crosstalk and improve noise reduction.
cellular network A network that can be used when a wireless network must cover a wide area. The network is made up of cells, each controlled by a base station. Also called a cellular WAN
cellular wan A network that can be used when a wireless network must cover a wide area. The network is made up of cells, each controlled by a base station. Also called a cellular WAN
coax cable A cable that has a single copper wire down the middle and a braided shield around it.
crimper A tool used to attach a terminator or connector to the end of a cable.
crossover cable A cable used to connect two like devices such as a hub to a hub or a computer to a computer (to make the simplest network of all). A crossover cable is not rated for Gigabit Ethernet.
data throughput In relation to analog communication, the range of frequencies that a communications channel or cable can carry. In general use, the term refers to the volume of data that can be transmitted on a bus or over a cable stated in bits per second (bps), kilobit
dsl A telephone line that carries digital data from end to end, and is used as a type of broadband Internet access
ethernet over power A technique to allow Ethernet transmissions over power lines. A powerline adapter is plugged into the electrical circuit(s) at both ends and the adapters connect to the Ethernet network. Because the transmissions are not contained, encryption is required
extender A device that amplifies and retransmits a wireless signal to a wider coverage area andretains the original network name.
f connector A connector used with an RG-6 coaxial cable and is used for connections to a TV and has a single copper wire.
fast ethernet An Ethernet standard that operates at 100 Mbps and uses twisted-pair cabling up to 100 meters (328 feet). Also called Fast Ethernet. Variations of 100BaseT are 100BaseTX and 100BaseFX.
ferrite clamp A clamp installed on a network cable to protect against electrical interference
fiber optic As applied to Internet access technologies, a dedicated, leased line that uses fiber-optic cable from the Internet service provider (ISP) to a residence or place of business.
fiber optic cable Cable that transmits signals as pulses of light over glass or plastic strands inside protected tubing.
gigabit ethernet A version of Ethernet that supports rates of data transfer up to 1 gigabit per second.
hub A network device or box that provides a central location to connect cables and distributes incoming data packets to all other devices connected to it. Compare with switch.
ifconfig A Linux and OS X command similar to the Windows ipconfig command that displays details about network interfaces and can enable and disable an interface. When affecting the interface, the command requires root privileges.
internet service provider A commercial group that provides Internet access for a monthly fee; Charter, Earthlink, and Windstream are large ISPs.
ipconfig A Windows command that displays TCP/IP configuration information and can refresh TCP/IP assignments to a connection, including its IP address.
isdn A broadband telephone line that can carry data at about five times the speed of regular telephone lines. Two channels (telephone numbers) share a single pair of wires. ISDN has been replaced by DSL.
keystone rj-45 jack A jack that is used in an RJ-45 wall jack.
LAN A network bound by routers that usually covers only a small area, such as one building.
latency Delays in network transmissions resulting in slower network performance. Latency is measured by the round-trip time it takes for a data packet to travel from source to destination and back to source.
LC (local connector) connector A fiber-optic cable connector that can be used with either single-mode or multimode fiber-optic cables and is easily terminated and smaller than an SC connector.
line of sight connectivity A type of connection used by satellites that requires no obstruction from mountains, trees, and tall buildings from the satellite dish to the satellite.
loopback plug A device used to test a port in a computer or other device to make sure the port is working and might also test the throughput or speed of the port.
MAN A type of network that covers a large city or campus.
mobile hotspot Created by a mobile device so that other devices or computers can connect by Wi-Fi to the device and on to the Internet.
MT-RJ (Mechanical Transfer Register Jack) A type of connector used by fiber-optic cables and can be used with either single-mode or multimode fiber-optic cables and is more difficult to connect than the smaller LC connector

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