Module 7 Flashcards
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.
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 signal
A type of signal where the data is represented by 0s and 1s.
Ethernet (802.3)
The most widely used wired networking standard. Typically used with LANs that have a star topology
global positioning system (GPS)
A system that uses satellites and a receiver to determine the exact geographic location of the receiver.
mesh network
A network in which there are multiple connections between the devices on the network so that messages can take any of several possible paths.
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.
WirelessHD (WiHD)
wireless networking standard designed for very fast transfers between home electronic devices.
Internet
largest computer network in the world
monitoring systems
use networking technology to determine the current location or status of an object. i.e. RFID, GPS, electronic medical monitors, home healthcare
telecommuting
individuals work from remote locations (usually home) and communicate with place of business and clients using networking technology
network topologies
indicates how the devices in a network are arranged
star network
all network devices connected to a central device. Most common.
bus network
all network devices connected to a central cable in a linear fashion
peer-to-peer (P2P) networks
content exchanged over internet, directly between users.
Personal Area Networks (PANs)
connects individual’s personal devices that are physical close together
Local Area Networks (LANs)
connects devices connected in small geographic area
Metropolitan Area Networks (MANs)
covers metropolitan areas such as a city or county and can handle higher population demands
Wide Area Networks (WANs)
covers a large geographic area
intranet
private network designed to be used by an organization’s employees
extranet
company’s network accessible by authorized outsiders
virtual private network (VPN)
private, secure path over the internet
bandwidth
amount of data that can be transferred in a given period of time
analog signal
data represented by continuous waves
digital signal
data represented by two discrete states (0s & 1s); faster
serial transmission
data sent one bit at a time, one after another, along a single path
parallel transmission
group of bits sent at the same time, and each bit takes a separate path. Used more often
twisted-pair cable
pairs of insulated wires twisted together. Used for telephones and LANs, Ethernet
coaxial cable
thick center wire surrounded by insulation, and covered with a shield of braided wire. Used in TVs.
fiber-optic cables
multiple thin glass or plastic fibers, with data sent via light pulses. Much faster.
cellular radio transmissions
radio transmissions sent to and from cell phones via cell towers. Service areas are arranged in overlapping honeycomb shaped zones called cells, with each cell containing one tower.
Wi-Fi
wireless networking standards
WiMAX
networking standards for longer range networks, like MANs.
network adapter
aka network interface card; used to connect a computer to a network
modem
used to connect a computer to a network over telephone lines
router
connects multiple networks
wireless access point
device that allows wireless devices to connect to a network.
bridge
connects two LANs
repeaters
devices that amplify signals along a network
range extenders
repeaters for a wireless network
T/F: GPS systems are used only by the government.
false
T/F: With serial transmissions, each bit of data is sent individually.
true
T/F: The Internet is an example of a LAN.
false
T/F: The type of cable used inside most homes for telephone service is twisted-pair wire.
true
T/F: A router is a type of modem.
false
With a(n) ___ network topology, all devices are connected in a line to a central cable.
bus
A(n) ____ phone can be used with more than one communications network, such as when used with both a cellular and Wi-Fi network.
dual-mode
A small network designed to connect the personal devices for an individual (such as via Bluetooth) is called a(n) ______
personal area network or PAN
A(n) ______ is a network that transfers private information securely over the Internet or other public network.
virtual private network or VPN
Match each description to its networking application, and write the corresponding number in the blank to the left of the description.
- To diagnose a patient from a distance.
- To work for a company in New York when you live in California.
- To watch a video in the living room that is stored on your computer.
- To receive telephone calls while you are out shopping.
- To determine your physical location while hiking in the mountains.
- Multimedia networking
- GPS
- Telemedicine
- Telecommuting
- Cellular phone
- To diagnose a patient from a distance.
- Telemedicine
- To work for a company in New York when you live in California.
- Telecommuting
- To watch a video in the living room that is stored on your computer.
- Multimedia networking
- To receive telephone calls while you are out shopping.
- Cellular phone
- To determine your physical location while hiking in the mountains.
- GPS
