CSS L11 - INTRODUCTION TO COMPUTER NETWORKS

Computer System Servicing NCII
Introduction Computer NetworkingMarvin B. Broñoso
CSS Teacher/Trainer
mbronoso@gmail.com
0918 6975164

Target Competencies
After this lesson module the student will be able to . . .
○ Understand the function of computer network.
○ Discuss how the computer network works.
○ Enumerate and explain the different devices use in computer
networking.
○ Differentiate the types of computer network

TERMINOLOGIES
NETWORK DIAGRAMS
Basic layout/map of a computer networks
NETWORK TYPES
Computer types are base in shape and size.
○ WAN ○ LAN ○ MAN ○ PAN
FIBER OPTIC CABLE
One of the latest innovation in network cabling.
SWITCHES & HUB
The central device within a computer network that transmit data
ROUTER
Connects Modem to other device to allow communication from
devices to the Internet.

TERMINOLOGIES
MODEM
Enable connection/communication with the internet.
TOPOLOGIES
refers the infrastructure of computer networks.
FIREWALL
Network software that keeps destructive forces and
intruders from a computer network.

COMPUTER NETWORKS
Computer network connects two or
more autonomous computers.
The computers can be geographically
located anywhere.

COMPUTER NETWORKS
Computer Network enable computer to
communicate and transfer data and files
from one computer to another.
Computer
Station 1
(SENDER)
Computer
Station 2
(RECEIVER)
Computer Digital Data and File
Transferring documents from computer
station 1 to computer station 2

COMPUTER NETWORKS
Computer networks can also create a
group of computer networks.
It uses a device called network
switch / hub to connect all the
computer station from one another
to establish a group of network.

TYPES OF COMPUTER NETWORK
○ Local Area Network (LAN)
○ Wide Area Network (WAN)
○ Metropolitan Area Network (MAN)
○ Personal Area Network (PAN)
○ Peer-to-peer

(1) Local Area Network (LAN)
A local-area network (LAN) is a
computer network that spans a relatively
small area. Most often, a LAN is confined
to a single room, building or group of
buildings, however, one LAN can be
connected to other LANs over any
distance via telephone lines and radio
waves.

(1) Local Area Network (LAN)
.

(2) Wide Area Network (WAN)
is a communications network that spans a
large geographic area such as across
cities, states, or countries. They can be
private to connect parts of a business or
they can be more public to connect
smaller networks together.

(2) Wide Area Network .

(3) Metropolitan Area Network (MAN)
is a series of LANs (Local Area Networks)
that are interconnected in a Metropolitan
area such as a city, region or country.

(3) Metropolitan Area Network

(4) Personal Area Network (PAN)
interconnection of information
technology devices or gadgets within the
environment of an individual user.

(4) Personal Area Network (PAN)

(5) Peer-to-Peer Network
Commonlyknown as P2P network.
is created when two or more PCs are
connected and share resources without
going through a separate server
computer. Each workstations has
equivalent capabilities and
responsibilities. Does not require switch
or hub.

(5) Peer-to-Peer Network

TECHONOLOGIES IN NETWORKING
NETWORK SWITCH / HUB
Used to connects various of network devices
and computer to perform computer networking.
A network device that channels incoming data
from any of multiple input ports to the specific
output port that will take it toward its intended
destination.

MODEM
A modem connects the source of your Internet
from your ISP and your home network,
whether you use a cable provider, like Comcast,
fiber optics, like FIOS, satellite, such as Direct
TV, or a DSL or dial-up phone connection. The
modem connects to your router–or directly to
your computer–using an Ethernet cable.
Modems are different for each type of service;
they are not interchangeable.

ROUTER
Network device that join multiple computer
networks together via either wired or wireless
connections.
It also connects two or more
networks and that the router
operates at the network layer of
the OSI model.

ETHERNET CABLE
A cable use to connect your computer and
network devices.
Ethernet cables resembles a phone cable but
are larger and feature more wires.
Both cables share a similar shape and plug but
an Ethernet cable has eight wires and a larger
plug than the four wires found in phone cables.

REPEATER
Network device used to regenerate or replicate
a signal.
It extend the coverage area of your WiFi
network. It works by receiving your existing WiFi
connection, amplifying it and then transmitting
the boosted signal. With this network device
you can boost the signal and effectively double
the coverage area of your WiFi network.

Your are using your computer
accessing the internet

Your computer will gather data and
information via digital signals
(computer data) through Ethernet cable
ETHERNET CABLE

If your computer is belong from a group of
network the Ethernet is connected from
your computer to a network switch.
NETWORK SWITCH
ETHERNET CABLE

If your computer is not belong to a group of
computer network the data and
information is directly pass through your
router and modem.
Router & Modem
ETHERNET CABLE

If your computer is not belong to a group of
computer network the data and
information is directly pass through your
router and modem.
Router & Modem
ETHERNET CABLE
NETWORK SWITCH
ETHERNET CABLE

Modem Router is provided by your chosen
Internet Service Provider (ISP) for you to
access and connect with the Internet.

Internet Service Provider in the Philippines
1. PLDT
2. SKY BROADBAND
3. CONVERGE ICT
4. BAYANTEL
5. SMART/SUN
6. GLOBE
7. INNOVE
8. EASTERN TELECOM
9. WI-TRIBE
10. DESTINY CABLE INTERNET

Acknowledgement
○ Andrew S. Tanenbaum, ComputerNetwork,Prentice-Hall
○ Doughlas E. Comer, ComputerNetworksand Internet
○
http://www.cisco.com/public/support/tac/documentation.html
○ FPPT.COM
Special thanks to . . .

CSS L11 - INTRODUCTION TO COMPUTER NETWORKS

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