Wireless Network Flashcards
This refers to a computer network that makes use of Radio Frequency connections between nodes in the network
wireless network
True or false: Wireless media provide temporary connections to an existing cabled network
True
what is the main advantage of wireless networking
flexibility
provide examples where wireless network is useful
- busy locations
- isolated areas and buildings
- departments that change frequently
- historic buildings
what are the four types of wireless networks
wireless lan
extended lan
mobile computing
wireless pan
network that exists at a single site. it can be used to connect a variety of components, such as computers, printers, and data storage devices
LAN
what is the most commonly known wireless LAN
Wi-Fi
consists of a network centralized around the devices of a single person in a single location; common inside hoes and small office buildings
personal area network (PAN)
what is the most commonly known wireless PAN
bluetooth
a computer network that spans across a city, small geographical area, or business or college campus
metropolitan area network (MAN)
this covers a very large area, like an entire city, state, or country. it can contain smaller networks, including LANs and MANs.
WAN
True or false: The internet is a WAN
True
What are the most commonly known wireless WANs
Cellular services
this makes use of a wireless bridge that connects two pre-existing networks
extended LAN
it is a component that offers an easy way to link buildings without using cable
wireless bridge
this is also known as cellular technology incorporating wireless adapters using cellular telephone technology to connect portable computers with the cables network
mobile computing
uses public carriers, such as long distance telephone companies, along with local telephone companies and their public services to transmit and receive signals using: packet-radio communication, cellular networks and satellite stations
mobile computing
this breaks a transmission into packets
packet radio transmission
True or false: in packet radio transmission, packets are linked up to a satellite that broadcasts them and only devices with the correct address can receive the broadcast packets
true
cellular networks are also called
cellular digital packet data (cdpd)
offers computer data transmissions over existing analog voice networks between voice calls when the system is not busy; this is very fast technology that is reliable enough for real-time transmission
cellular networks
good choice for interconnecting buildings in small, short-distance systems such as those on a campus or in an industrial park
microwave system
most widely used long distance transmission method in the US
microwave transmission
excellent for communicating between two line-of-sight such as satellite-to-ground links, between two buildings, and across large, flat open areas, such as bodies of water or deserts
microwave system
What are the four techniques used by wireless networks
- infrared transmission
- laser transmission
- narrowband (single-frequency) radio transmission
- spread spectrum radio transmission
used in wireless LANs; this operates by using an infrared light beam to carry the data between devices
infrared transmission
this system need to generate very strong signals because weak transmission signals are susceptible to interference from light sources such as windows
infrared transmission
true or false: many printers today are preconfigured to accept infrared signals
true
this stands for Light Amplification by Stimulated Emission of Radiation and it describes the physical process by which light is amplified
LASER
similar to infrared technology in that it requires a direct line of sight and any person or thing that breaks the laser beam will block the transmission
laser technology
this transmission technique is similar to broadcasting from a radio station, where the user tunes both the transmitted and the receiver to a certain frequency
narrowband (single-frequency) radio transmission
true or false: narrowband radio transmission does not require line-of-sight focusing because the broadcast range is 3000 meters, but it’s slow (4.8 mbps range)
true
this radio transmission technique broadcasts signals over a range of frequencies, where the available frequencies are divided into channels or hops
spread spectrum radio transmission
the adapters for spectrum are tuned in to a specific hop at a predetermined period of time and then switches to the next hop; all the computers in the network are synchronized to the hop timing, which provides built-in security
spread spectrum radio transmission
