Project about computer technology for the bilingual section of Technology at IES Praia Barraña school in Boiro, Spain.

1. Julia Martínez Tomé & Ana Bugallo.
3º ESO- A.

2.  1. What’s a computer network?
 2. Categories of computer networks:
2.1. Local area networks or LANs.
2.2. Metropolitan area networks or MANs.
2.3. Wide area networks or WANs.
 3. Fundamental elements
 4. Internet access

3.  A computer network is a set of computers
connected to each other so they can share
resources and exchange information.

4.  We can divide the computer networks in three
types:
1. Local area networks or LANs.
2. Metropolitan area networks or MANs, made
up of several LANS.
3. Wide area networks or WANs, covering a
country or continent.

5.  The LANs are
computer
networks that
interconnect
computers in a
limited area such as a
home, school, compu
ter laboratory or
office building, using
network media.

6.  Differents types of LANs:

7.  A MAN is a computer network that usually spans a city
or a large campus. A MAN usually interconnects a
number of LANs using a high-capacity backbone
technology, such as fiber-optical links, and provides
up-link services to WAN and the Internet.

8.  A WAN is a network that covers a broad
area (i.e. any telecommunications
network that links across
metropolitan, regional or national
boundaries) using private or
public network transports.
 They are also call Wireless LANs.

9.  They use electromagnetic waves to transmit
data.
 Networks with a combination of wired and
wireless devices use wireless access points or
WAP that can transmit data through wires or
electromagnetic waves.

10.  An adaptor (or
Network Card network card) to
send and receive
information
to and from
other computers.

11.  The hub distributes all Hub
of the information it
receives among the
other computers in the
network.

12.  A cable similar to a RJ45 connector
telephone wire with
an RJ45 connector at
the end which
lets the
information pass
through it.

13.  We can use coaxial and optical
fiber cables for this function.
Optical fiber cable Coaxial cable

14.  We can connect to the Internet in two
different ways.
What are they?

15.  Using Internet Connection
Sharing (ICS), in which one
computer is switched
on all the time so that all
the communication can go
through it.

16.  Using a router, a
device which detects
data and directs it to
and from the Internet.

17.  But network sharing has got one
disadvantage.
What could it be?

18.  In order for the
other users
 Us to be able to access the
Internet,
the computer with
all the shared
elements must be
switched on at all
times.

19. How can
we overcome this
problem?

20.  We can use
network storage
systems and
print servers.

21.  http://en.wikipedia.org/wiki/Wide_area_network
 https://www.google.es/search?q=google+imagenes&aq=0&um=1&ie=UTF-
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 http://en.wikipedia.org/wiki/Local_area_network
 http://en.wikipedia.org/wiki/Metropolitan_area_networks