CHAP 2 Flashcards
___ generated through the use of computers. Generated information is not useful in itself. The information must be sent to the right person at the right time.
Information
Often information must be sent from one
place to another. This process is called___
data communication.
___ is the active process of transporting data from one point to another.
Data communication
___are communication system designed to convey information from a point of origin to a point of destination.
Networks
___ The system must deliver data to the correct destination. Data must be received by the
intended device or user and only by that device or user.
Delivery
The system must deliver data accurately. Data that have been altered in transmission
and left uncorrected are unusable.
Accuracy
_____ The system must deliver data in a timely manner. Data delivered late are useless.
Timeliness
What are the Data Communication Component ?
Transmitter, Receiver, Medium, Message, Protocol
___ is the device that sends the message. It could be a workstation, computer,
video camera, phone, and more
Transmitter
___ is the device that receives the message. It could be a television, phone, workstation,computer, and so on.
Receiver
The physical path a message takes from sender to recipient is known as the transmission____
Medium
The transmission (data) that needs to be communicated is called the___ It can include any combination of text, numbers, images, sound, and video.
Message
___ It is a set of rules that governs data communication. It is an agreement between the devices that
are communicating.
Protocol
What are the major communication devices ?
Wire pairs, Twisted pair, Coaxial cable, Optical Fiber, Terrestrial microwave, Communications satellites
___ is made up of connections between different computer systems that are spread out across different locations
computer network
The computer that provides resources to other computers on a network is known as___
server
In the network the individual computers, which access shared network resources, are known as___
nodes
A ____ sometimes just called a network, is a collection of hardware components and computers connected by communication channels that enable resource and information sharing.
computer network
___Through the use of a network, people can communicate effectively and conveniently through video conferencing, chat rooms, instant messaging, email, and phone calls. “
Facilitate communications
___ In a network setting, data and information on other computers on the network may be accessed by
authorized users. The capability of providing access to data and information on shared storage devices is
an important feature of many networks
Permit sharing of files, data, and other types of information
___ Each computer connected to a network can access and utilize resources made available by other network
devices, such as printing a document on a shared network printer, in a networked environment.
Share network and computing resources
What are the Types of Networks ?
Local Area Network (LAN), Wide Area Network (WAN), Metropolitan Area Network (MAN)
What are the Network Devices Typically Used ?
•Router,
•Switch,
•Gateway,
• Hub,
•Repeater,
•Modem,
•Bridge,
•Access Point,
•Firewalls.
____ Similar to a switch, a_____ is a device that routes data packets according to their IP addresses. Primarily, the router is a Network Layer device. LANs and WANs are typically connected by routers, which use a dynamically updated routing table to determine how to route data packets.
Router
