Chapter 6
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Communication involves someone who sends a message and someone who receives a message,
as well as – communication medium and a common protocol
Communication protocols – keep track of address information
A medium in communications is some kind of network – True
A cellular tower relays – radio waves
IRDA stands for – infrared data association
IRDA is quickly being replaced by this technology – Bluetooth
IRDA’s chief drawback in the PC world is that it requires – line of sight
Forms of electromagnetic radiation differ in the – length of their radio waves
POP stands for – Post Office Protocol
Which retrieval protocol allows you to synchronize mail folders between your email client and
the email server – IMAP
The protocol used to deliver messages to the server is – Simple Mail Transfer Protocol
An example of a webmail service is – gmail
Bluetooth uses this medium to connect two devices – radio signals
Perform this action with a new Bluetooth headset so that the headset can communicate with
your smartphone – pair the headset with the smartphone
Bluetooth devices use this technique to ensure data is not hindered by interference from other
similar devices within proximity – frequency hopping
Paired Bluetooth devices that are communicating with each other are operating within a
personal-area network (PAN), or ____ - piconet
What is the purpose of the hub and switch – the connect the nodes
This element receives packets of data and sends that data out to all of the connected ports, not
just the port that should receive the data – hub
This element determines which address the packet of data should be delivered to and sends it
only to that destination – switch
SSID is – the name of your network
Setting up network security involves a – security type, password
When you share files on a network you can set access rights to read/write or – read-only
Setting up a network allows users to share files, a printer, and – an internet connection
The purpose of a firewall is to – block unwanted information from reaching your computer or
computer network
The two kinds of firewall are hardware and application layer – False
Software firewalls – may include privacy controls, can be configured to recognize trusted
sources, only protect the computer they are installed on
The best type of firewall protection for a network is – hardware and software
Another term for cloud computing is – utility computing
Cloud computing providers offer – online storage, online applications, online computing
capacity
One type of savings from cloud computing is reduced IT staffing costs
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Under the cloud computing model, when an application comes out in a new version – the cloud
computing provider upgrades the application once online
According to silverman, fewer people are suing their smartphones to –make voice calls
Which of the following is NOT an example of voice being carried over the internet – Twitter
Silverman claims that many young people find calls and talking over electronic networks to be –
awkward, intrusive, inefficient
Silverman points out that text communication sometimes leaves itself open to –
misinterpretation
The speed with which a signal can change from high to low is called – frequency
A communication medium that carries a large amount of Data at a fast speed is called –
broadband
Which of the following is NOT a transmission medium – smartphone
This wireless medium is the next generation of wireless broadband that provides faster access
and can be used across a longer range – wimax
RFID is an acronym that stands for – radio frequency identification
This hardware enables the computer without built-in networking capability to connect to the
network – network interface card
this device in a home network allows you to connect multiple computers to one high-speed
connection – router
this organization is one that is involved with developing and approving network standards –
institute of Electrical and Electronics Engineers (IEEE)
the rules that define how two devices communicate are called – a protocol
this type of network is defined within a small area such as room or a building – LAN
this is the term use to refer to a network’s design – network architecture
this term is used to describe hosted services on the internet – cloud computing
Definitions
Fiber optic cable – a transmission medium that uses a protected string of glass which transmits beams of
light. A very fast type of transmission, sending billions of bits per second
Switch – hardware device that joins several computers together to coordinate message traffic in one
LAN network. It can check the data in a packet it receives and help to send it to the correct destination
Digital signal - discrete signal that is either high or low
Analog signal – formed by continuous radio waves that fluctuate from high to low
MAN – a type of network that connects networks within a city, university, or other populous area to a
larger high-speed network
Microwave – a high-frequency radio signal that is sent from one tower to another. Because the signal
cannot bend around obstacles, the towers have to positioned in line of sight of each other
Bluetooth – a network protocol that offers direct short-range connectivity (3 to 300 feet depending on a
device’s power class) via radio waves between devices such as your cell phone and car
Bandwidth – the number of bits (pieces of data) per second that can be transmitted over a
communications medium
WAP – specifies how mobile devices such as cell phones display online information such as maps and
email
Peer-to-peer – a network architecture in which each computer in the network can act as both server and
client
Ethernet – a standard that specifies that there is no central device controlling the timing of data
transmission. With this standard, each device tries to send data when it senses that the network is
available
Hub – used on older LAN networks to coordinate the message traffic on computers connected to the
network
Node – a device connected to a network
Communications system – computer hardware and software is used to facilitate the exchange of data
between a sender and a receiver
Coaxial cable – the cable that is used to transmit cable television signals over an insulated wire at a fast
speed
Twisted pair – used for wired telephone connections
Client – a computer or other device capable of sending data to and receiving data from any combination
of hardware and software on a network
Server – any combination of hardware and software that provides a service, such as storing data, to a
device, such as your computer