INF 1505: CHAPTER 6 QUESTIONS AND ANSWERS LATEST
UPDATE A+ GRADED
Telecommunications
The electronic transmission of signals for communications; enables organizations to
carry out their processes and tasks through effective computer networks.
channel bandwidth
The rate at which data is exchanged, usually measured in bits per second (bps).
broadband communications
a telecommunications system in which a very high rate of data exchange is possible
Narrowband communication
A telecommunications system that supports a much lower rate of data exchange than
broadband.
twisted-pair cable
Cables made of copper wires that are twisted around each other and are surrounded by
a plastic jacket (such as traditional home phone wire).
coaxial cable
insulated copper wire; used to carry high-speed data traffic and television signals
fibre optic cable
Many extremely thin strands of glass bound together in a sheathing; uses light beans to
transmit signals.
Broadband over power line (BPL)
technology makes possible high-speed Internet access over ordinary residential
electrical lines and offers an alternative to DSL or high-speed cable modems
Microwave transmission
the technology involving signals in the gigahertz range that are transmitted to relays in
the line of sight
3G
Third generation wireless communication technology allows high speed wireless data
transfer
Wi-Fi
A medium-range wireless telecommunications technology brand owned by the Wi-Fi
Alliance.
Near Field Communication (NFC)
a very short-range wireless connectivity technology designed for cell phones and credit
cards
Bluetooth
A wireless communications specification that describes how smartphones, computers,
printers and other electronic devices can be interconnected over distances of a few
meters at a rate or about 2 Mbps
ultra-wideband (UWB)
A networking standard for very short-range wireless connections among multimedia
devices.
, infrared transmission
A form of wireless transmission over
unbounded media in which signals are sent as pulses of infrared light.
Modem
A telecommunications hardware device that converts (modulates and demodulates)
communications signals so they can be transmitted over the communication media.
Analogue signal
A variable signal continuous in both time and amplitude so that any small fluctuations in
the signal are meaningful.
Digital signal
A signal that represents bits.
Multiplexer
a device that encodes data from two or more data sources onto a single
communications channel, thus reducing the number of communications channels
needed and lowering telecommunications costs.
front-end processor
a special-purpose computer that manages communications to and from a computer
system serving hundreds or even thousands of users
Private Branch Exchange (PBX)
A telephone exchange that serves a single organisation.
switch
a telecommunications device that uses the physical device address in each incoming
message on the network to determine to which output port it should forward the
message to reach another device on the same network
bridge
A telecommunications device that connects one LAN to another LAN that uses the
same telecommunications protocol
router
a telecommunications device that forwards data packets across two or more distinct
networks toward their destinations, through a process known as routing.
gateway
a telecommunications device that serves as an entrance to another network
computer network
The communications media, devices and software needed to connect two or more
computer systems and/or devices
Personal Area Network (PAN)
A network that supports the interconnection of information technology within a range of
10 meters or so.
Local Area Network (LAN)
a network that connects computer systems and devices within a small area, such as an
office, home, or several floors in a building
Metropolitan Area Network (MAN)
A telecommunications network that connects users and their computers in a
geographical area that spans a campus or city.
Wide Area Network (WAN)
A telecommunications network that connects large geographic regions.
UPDATE A+ GRADED
Telecommunications
The electronic transmission of signals for communications; enables organizations to
carry out their processes and tasks through effective computer networks.
channel bandwidth
The rate at which data is exchanged, usually measured in bits per second (bps).
broadband communications
a telecommunications system in which a very high rate of data exchange is possible
Narrowband communication
A telecommunications system that supports a much lower rate of data exchange than
broadband.
twisted-pair cable
Cables made of copper wires that are twisted around each other and are surrounded by
a plastic jacket (such as traditional home phone wire).
coaxial cable
insulated copper wire; used to carry high-speed data traffic and television signals
fibre optic cable
Many extremely thin strands of glass bound together in a sheathing; uses light beans to
transmit signals.
Broadband over power line (BPL)
technology makes possible high-speed Internet access over ordinary residential
electrical lines and offers an alternative to DSL or high-speed cable modems
Microwave transmission
the technology involving signals in the gigahertz range that are transmitted to relays in
the line of sight
3G
Third generation wireless communication technology allows high speed wireless data
transfer
Wi-Fi
A medium-range wireless telecommunications technology brand owned by the Wi-Fi
Alliance.
Near Field Communication (NFC)
a very short-range wireless connectivity technology designed for cell phones and credit
cards
Bluetooth
A wireless communications specification that describes how smartphones, computers,
printers and other electronic devices can be interconnected over distances of a few
meters at a rate or about 2 Mbps
ultra-wideband (UWB)
A networking standard for very short-range wireless connections among multimedia
devices.
, infrared transmission
A form of wireless transmission over
unbounded media in which signals are sent as pulses of infrared light.
Modem
A telecommunications hardware device that converts (modulates and demodulates)
communications signals so they can be transmitted over the communication media.
Analogue signal
A variable signal continuous in both time and amplitude so that any small fluctuations in
the signal are meaningful.
Digital signal
A signal that represents bits.
Multiplexer
a device that encodes data from two or more data sources onto a single
communications channel, thus reducing the number of communications channels
needed and lowering telecommunications costs.
front-end processor
a special-purpose computer that manages communications to and from a computer
system serving hundreds or even thousands of users
Private Branch Exchange (PBX)
A telephone exchange that serves a single organisation.
switch
a telecommunications device that uses the physical device address in each incoming
message on the network to determine to which output port it should forward the
message to reach another device on the same network
bridge
A telecommunications device that connects one LAN to another LAN that uses the
same telecommunications protocol
router
a telecommunications device that forwards data packets across two or more distinct
networks toward their destinations, through a process known as routing.
gateway
a telecommunications device that serves as an entrance to another network
computer network
The communications media, devices and software needed to connect two or more
computer systems and/or devices
Personal Area Network (PAN)
A network that supports the interconnection of information technology within a range of
10 meters or so.
Local Area Network (LAN)
a network that connects computer systems and devices within a small area, such as an
office, home, or several floors in a building
Metropolitan Area Network (MAN)
A telecommunications network that connects users and their computers in a
geographical area that spans a campus or city.
Wide Area Network (WAN)
A telecommunications network that connects large geographic regions.
