Is a digital modem that sends and receives digital data over the cable television?

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Terms in this set (106)

802.11

a series of network standards that specifies how two wireless devices communicate over the air with each other

ATM

self-serving banking terminal that connects to a host computer through a network

bandwidth

amount of data, instructions, and information that can travel over transmission media

broadband

Internet connection with fast data-transfer speeds and an always-on connection

broadcast radio

wireless transmission medium that distributes radio signals through the air over long distances such as between cities, regions, and countries and short distances, such as within an office or home

cable modem

broadband modem that sends and receives digital data over the CATV network

cellular radio

form of broadcast radio that is in wide use for mobile communications, specifically wireless modems and mobile phones

client/server network

network in which one or more computers act as a server, and the other computers on the network request services from the server

clients

the other computer and mobile devices on a network that rely on the server for its resources

coaxial cable

physical transmission media that consists of a sigle copper wire surrounded by at least three layers: 1. an insulated material, 2. a woven or braided metal, and 3. a plastic outer coating

communications device

hardware capable of transferring items from computers and devices to transmission media and vice versa

communications satellite

a space station that receives microwaves signals from an earth-based stations, amplifies the signals, and broadcasts the signals back over a wide area to any number of earth-based stations

communications software

programs and apps that 1. help users establish a connection to another computer, mobile device, or network 2. manage the transmission of data, instructions, and information, and 3. provide an interface for users to communicate with one another

dedicated line

type of always-on physical connection that is established between two communications devices

DSL

Broadband Internet connection provided through the telephone network via a DSL modem

DSL modem

broadband modem that sends digital data and information from a computer to a DSL line and receives digital data and information from a DSL line

Ethernet

a network standard that specifies no central computer or device on the network (nodes) should control when data can be transmitted

fiber-optic cable

physical transmission media that consists of dozens or hundreds of thin strands of glass or plastic that use light to transmit signals

FTTP, fiber to the premises

dedicated line that uses fiber-optic cable to provide extremely high-speed Internet access to a user's physical permanent location

home network

multiple computers and devices connected together by home users

IrDA

infrared data association; standard to transmit data wirelessly to each other via infrared light waves

latency

the time it takes a signal to travel from one location to another on a network

local area network, LAN

a network that connects computers and devices in a limited geographical area such as a home, school, office building

microwaves

radio waves that provide a high-speed signal transmission

network

collection of computers and mobile devices connected together, often wirelessly, via communication devices and transmission media

NFC

type of wireless connection that uses close-range radio signals to transmit data between two

personal area network, PAN

a network that connects computers and devices in an individuals's work space using wired and wireless technology

receiving device

device that accepts the transmission of data, instructions, or information

sending device

device that initiates an instruction to transmit data, instructions, or information

server

computer dedicated to providing one or more services to other computers or devices on a network

T-carrier line

any of several types of long-distance digital phone lines that carry multiple signals over a single communications line

token ring

standard that specifies that computers and devices on the network share or pass a special signal, called a token, in an unidirectional manner and in a preset order

transmission media

materials or substances capable of carrying one or more communications signals

twisted-pair cable

physical transmission media that consists of one or more twisted-pair wires bundled together

UWB (ultra-wideband)

a network standard that specifies how two UWB devices use short-range radio waves to communicate at high speeds with each other

wide area network, WAN

a network that covers a large geographic area using a variety of wired and wireless transmission media

Wi-Fi

wireless communication technology that uses radio signals to provide high-speed Internet and network communications to computers and devices capable of communicating via Wi-Fi

WiMax

worldwide interoperability for microwave access; a network standard developed by IEEE that specifies how wireless devices communicate over the air in a wide area

wireless LAN (WLAN)

a LAN that uses no physical wires

ADSL (asymmetric digital subscriber line)

a type of DSL that supports faster transfer rates when receiving data than when sending data

body area network (BAN)

network used by medical professionals that uses low powered sensors to collect data

broadband modem

communications device that sends and receives data and information to and from a digital line

broadband router

a device that performs the functions of a router and also a broadband modem

broadband wireless router

a device that performs the functions of a router, a wireless access point, and a cable or DSL modem

bus network

network topology which consists of a single central cable, to which all computers and other devices connect

cable Internet service

the high-speed Internet connections provided by the cable television network

coax

physical transmission media that consists of a single copper wire surrounded by at least three layers

communications channel

media on which data, instructions, or information travel in a communications system

dial-up modem

communications device that converts digital signals to analog signals and analog signals to digital signals, so that data can travel along an analog phone line

Digital Subscriber Line

DSL

downlink

transmission from a satellite to an earth-based station

downstream rate

transfer rate that is achieved when data is being sent over a communications channel

EDI (electronic data interchange)

standard that defines how business documents transmit across transmission media

electronic funds transfer (EFT)

service in which users connected to a network can exchange money from one account to another via transmission media

extranet

portion of a company's network that allows customers or suppliers to access part of its intranet

file sharing network

P2P Internet network on which users access each other's hard drives and exchange files directly over the Internet

fixed wireless

broadband internet connection that uses a dish-shaped antenna on a building, such as a house or business, to communicate with a tower location via radio signals

fractional T1

T-carrier line that home and small business users purchase, in which they share a connection to a T1 line with other users

FTTB (fiber to the building)

dedicated line used by small businesses to access the internet via fiber-optic cable

FTTH (fiber to the home)

dedicated line that provides home users with Internet access via fiber-optic cable

Gbps

gigabytes per second

GPRS

general packet radio service, a 2G standard for cellular transmissions

GSM

global system for mobile communications, a 2G standard for cellular transmissions

hardware firewall

built-in feature in routers that prevents unauthorized users from accessing files and computers in a network

host computer

computer that controls access to the hardware, software, and other resources on the network and provides a centralized storage area for programs, data, and information

hub

device that provides a central point for cables in a network

ISDN

integrated services digital network, set of standards for digital transmission of data over standard copper phone lines

ISDN modem

broadband modem that sends digital data and information from a computer to an ISDN line and receives digital data and information from an ISDN line

line-of-sight transmission

requirements that the sending device and the receiving device must be in line with each other so that nothing obstructs that path of the infrared light wave

LTE

long term evolution; a 4G standard for cellular transmission

Mbps

megabytes per second

metropolitan area network (MAN)

a high-speed network that connects local area networks in a metropolitan area, such as a city or town, and handles the bulk of communications activity across that region

microwave station

an earth-based reflective dish that contains the antenna, transceivers, and other equipment necessary for microwave communications

mobile broadband wireless router

a device that performs the functions of a router, a wireless access point, and a wireless modem

mobile hot spot

smartphones that can function as a wireless modem when tethered to a personal computer

multiplexing

ISDN line technique of carrying three or more signals at once through the same line

near field communications

type of wireless connection that uses close-range radio signals to transmit data between two NFC-enabled devices

network architecture

the configuration of computers, and media in a network

network card

a communications device that enables a computer or device that enables a computer or device that does not have a built-in networking capability to access a network

network interface card

same as network card

network license

legal agreement that allows multiple users to access software on the server simultanesously

network standard

guidelines that specify the way computers access the medium to which they are connected, the types of medium used, the speeds used on different types of networks, and the types of physical cable and/or the wireless technology

node

each computer or device on a network

optical fiber

each strand of a fiber-optic cable

packet sniffer

software that monitors and logs packet traffic for later analysis

packet switcher

technique of breaking a message into individual packets, sending the packets along the best route alailable, and then reassembling the data

packets

small pieces into which messages are divided by TCP/IP

peer

each computer on a peer-to-peer network

peer-to-peer network (P2P)

P2P; a simple, inexpensive network that typically connects fewer than 10 computers

protocol

standard that outlines characteristics of how two devices communicate on a network

router

communications device that connects multiple computers or other routers together and transmits data to its correct destination on a network

star network

network topology in which all of the computers and devices on the network connect to a central device, thus forming a star

switch

device that provides a central point for cables in a network

T1 line

the most popular T-carrier line

T3 line

T-carrier line that is equal in speed to 28 T1 lines

token

special series of bits that functions like a ticket

twister-pair wire

two separate insulated copper wires that are twister together

UMB

ultra mobile broadband; a 4G standard for cellular transmissions

UMTS

universal mobile telecommunications system; a 3G standard for cellular transmissions

uplink

transmission from an earth-based station to a satellite

upstream rate

the transfer rate that is achieved when data is being received on a communications channel

value-added network

a third party business that provides networking services such as EDI services, secure data and information transfer, storage, or email

wireless access point

central communications device that allows computers and devices to transfer data wirelessly among themselves or to transfer data wirelessly to a wired network using wireless technologies such as Wi-Fi

wireless Ethernet

term sometimes used to refer to Wi-Fi because it uses techniques similar to the Ethernet standard to specify how physically to configure a wireless network

wireless modem

modem that uses the cellular radio network to provide Internet connections

wireless router

device that performs the functions of a router and also a wireless access point

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What is a digital modem?

A system component that enables communication over digital access facilities with a remotely located system connected to the public network over analog facilities.

What are the 4 types of modem?

Types of Modem.
Cable Modems. Cable modems help in establishing communication between computer and ISP over landline connection. ... .
Telephone Modems. These modems are network devices that allow data communication between two computers over voice-grade telephone lines. ... .
Dial modems. ... .
Satellite Modems. ... .
Digital Subscriber Line (DSL).

What is called modem?

modem, (from “modulator/demodulator”), any of a class of electronic devices that convert digital data signals into modulated analog signals suitable for transmission over analog telecommunications circuits.

Is a cable modem a modem?

The cable modem bridges Ethernet frames between a customer LAN and the coax network. Technically, it is a modem because it must modulate data to transmit it over the cable network, and it must demodulate data from the cable network to receive it.

What type of device is a modem?

A modulator-demodulator or modem is a computer hardware device that converts data from a digital format into a format suitable for an analog transmission medium such as telephone or radio.

Is a modem needed for cable TV?

Putting both upstream and downstream data on the cable television system requires two types of equipment: a cable modem on the customer end and a cable modem termination system (CMTS) at the cable provider's end.