Networks, Internet, and Internet Protocol Flashcards
is a collection of
computers and devices
connected together via
communication devices
and transmission media.
For example it may
connect computers,
printers, and scanners.
Computer Network
The term _______ is defined as a set
of computers of different types,
terminals, telephones, and other
communication equipment’s,
connected by data communication
links, which allow the network
components to work together.
Network
a small wired or wireless
network.
Typically, all the devices are in a single
building, or even on a single floor in a
large building. Too many computers in a
LAN can lead to delays in sending and
receiving information.
covers a
small area such as a small office or home. It physically
connects all the computers located in the premises.
LAN / Local Area Network
a network that covers a city.
Essentially, it’s any network bigger than
a LAN but too small to be considered a
WAN.
Large university campuses sometimes
have MANs with fiber optic connections
between buildings.
MAN / Metropolitan Area Network
a network that covers more
than 48km (30 miles). It connects devices
using copper wire, satellites, or fiber
optic cables. Big companies, such as
Google, Microsoft, and Facebook, need
WANs because they have offices in
different cities. The internet is the largest
WAN in existence.
WAN / Wide Area Network
is the strategy used to connect devices
together. The layout depends on the type of
information being shared, the volume of
communications, and how devices need to store
data. There are pros and cons to each layout.
Topology
TYPES OF NETWORKS: TOPOLOGY
* uses a central cable
to which all network devices connect.
* All data is transmitted down the bus
line (backbone) from one device to
another so, if the bus line fails, then
the network cannot function.
Its cheap and simple to set up.
However, if the backbone breaks, the
network is useless. Nowadays, bus
topology is considered outdated.
Bus Topology
- devices are
connected to a central ring where
data flows in a single direction. - When a computer sends a request,
the signal travels a long the ring
and visits each device. It handles
volume better than bus topology.
It’s more robust and can span
greater distances. However, it’s
more expensive, and like bus
topology, it’s considered outdated.
Ring Topology
used in
traditional mainframe
environments, as well as in
small office, home, and
wireless networks. All the
networked devices connect to
a central device (such as a
server or a switch) through
which all network
transmissions are sent.
If the central device fails, then
the network cannot function.
Star Network
uses a number
of different connections between
network devices so that data can
take any of several possible paths
from source to destination.
are used most often
with wireless networks.
Mesh Network
It is a computer network system that
connects the computers of the world. It is
normally connecting through WAN and LAN
Internet
It is a close room computer network system, as
it covers a small area and only authorized people can access it.
Intrament
It is also a sort of Internet access to which is
granted only to a few.
Extranet
It is the service that is used on Internet to view and search contents(in the form of webpages).
World Wide Web (WWW)
It is an online facility that
facilitates us to chat or talk. Such service is provided by Skype,
Google Talk, Windows Live Messenger, Yahoo Messenger, etc.
Instant Messaging (IM)
It is a Protocol,
which is used especially for voice transfer over IP network.
Likewise, it facilitates users to make phone-calls by using
internet.
Voice over Internet Protocol (VoIP)
It is a technique,
which is used for the dissemination of information,
articles, etc. Users normally subscribe to the RSS channel
in order to receive news. After subscription, users do not
need to visit the respective website rather they receive
emails regarding the same.
Really Simple Syndication (RSS)
It is a sort of online inventory (normally on a
specialized topics) that consists of a series of entries. These
entries are arranged in opposite chronological order. The
person who maintains the weblog regularly update it with a
new information.
Web log
