This document defines and describes different types of computer networks and networking devices. It discusses local area networks (LANs) that connect computers within a small area like a building or lab, metropolitan area networks (MANs) that connect networks within a larger region like a city, and wide area networks (WANs) that connect large geographic areas like countries or continents. Common networking devices described include hubs, switches, bridges, routers, gateways, interfaces, modems, and firewalls.

1. Prepared by: EILLEN IVY A. PORTUGUEZ
Teacher III
Siari John H. Roemer Memorial NHS

2. NETWORK - Consist of two or more computers that are linked
in order to share resources (such as printers and CD-ROMs)
exchange files, or allow electronic communications.
The computer in a network may be linked through cables,
telephone lines, radio waves, satellites, or infrared light
beams.

3. THREE BASIC TYPES OF NETWORK
 Local Area Network (LAN)
 Metropolitan Area Network (MAN)
 Wide Area Network (WAN)

4. LOCAL AREA NETWORK - Is a network that is confined to
relatively small area.
◦ Generally limited to a geographic area such as a computer lab,
school, building.
◦ In a typical LAN configuration, one computer is designated as the
file server. It stores all of the software that controls the network, as
well as the software that can be shared by the computers attached to
the network.
◦ Computer connected to the serves are called Workstations.
◦ Workstations can be less powerful than the file server.

5. LOCAL AREA NETWORK

6. METROPOLITAN AREA NETWORK – Is a network that
interconnects users with computers resources
◦ in a geographic area or region larger than that covered by the Local
Area Network (LAN) but smaller than the area covered by a Wide
Area Network (WAN)
◦ The term is applied to the interconnection of networks in a city into a
single larger network.

7. METROPOLITAN AREA NETWORK

8. WIDE AREA NETWORK – Connect larger geographic areas,
such as Florida, the United States, or the world. Dedicated
transoceanic cabling or satellite uplinks may be used to
connect this type of network.

9. WIDE AREA NETWORK

10. NETWORKING
DEVICES

11. Hub - a small, simple, inexpensive device that joins multiple
computers together.

12. Ethernet Switch - a device that gathers the signals devices
that are connected to it, and then regenerates a new copy of
each signal.

13. Bridge- is a device filters data traffic at a
network boundary. Bridges reduce the
amount of traffic on a LAN by dividing it into
two segments.

14. Routers - are small physical devices that join
multiple networks together.

15. How routers works?

16. Network Gateway – is an internetworking system capable of
joining together two networks that use different base
protocols.
- can be implemented completely in software, completely in
hardware or as a combination of both.

17. Network Interface – is a device that connects a client
computer, server, printer or other component to your network.

18. Modem- is a contraction of the terms modulator and
demodulator.
- translates digital signals from a computer into analog
signals that can travel across conventional phone lines.

19. ISP-Internet Service
Provider
Globe Broadband
Smart Bro
PLDT My DSL

20. Network Firewall – protects a computer network from
unauthorized access.
- can be a hardware devices, software programs, or a
combination of two.

23. WHAT TO PROCESS
DIRECTION: Identify what is being described in the following sentences and write
your answer on a separate sheet of paper.
A.
1. It protects a computer network from unauthorized access.
2. Type of network that connect larger geographic areas, such as Florida, the United States, or
the world.
3. This is internetworking system capable of joining together two networks that use different
base protocols.
4. It is consists of two or more computers that are linked in order to share resources (such as
printers and CD-ROMs), exchange files, or allow electronic communications.
5. They translate digital signals from a computer into analog signals that can travel across
conventional phone lines.
6. It is a device that connects a client computer, server, printer or other component to your
network.
7. A device filters data traffic at a network boundary
8. It is a device that gathers the signals from devices that are connected to it, and then
regenerates a new copy of each signal.
9. It is a small, simple, inexpensive device that joins multiple computers together.
10. Type of network that is confined to a relatively small area.

24. B. Identify the following network devices:

25. TASK 1: Draw a diagram of the following types networking base in your own
understanding.
1. LAN with shared printer but without internet
connection. Limit only to 6-10 workstation and 1
server.
2. Proposed MAN of 5 High Schools in Sindangan,
Zambo. Norte.
3. WAN connection in your home. Assuming you
have internet connection.