A client-server network connects client computers to a central server computer. The server provides services like file storage and sharing to the clients. Key advantages include centralized backups, security and data access, though the server is an expensive single point of failure. Common network topologies include star, bus, ring and mesh configurations that connect devices in different patterns and have tradeoffs in cable needs, expansion and fault tolerance. Factors like computer types, distances, speeds and growth influence topology selection.

2. DEFINITION OF CLIENT SERVER NETWORK
• A type of network in which server computer is connected to client
computers.
• What is client
• The client is a computer that requests service from the server.
• What is server
• A server is a computer that provides services to the client computer.

3. CLIENT SERVER NETWORK

4. ADVANTAGES DISADVANTAGES
All files are stored in a central
location
A specialist network operating
system is needed
Network peripherals are
controlled centrally
The server is expensive to
purchase
Backups and network security
is controlled centrally
Specialist staff such as a
network manager is needed
Users can access shared data
which is centrally controlled
If any part of the network fails
a lot of disruption can occur

5. NETWORK TOPOLOGY
A network topology refers to the layout or
arrangement of the computers and device in
communications network.
Four commonly used network topologies are;
I. Star topology
II. Bus topology
III. Ring topology
IV. Mesh topology

6. FACTORS TO CONSIDER WHEN
SELECTING A NETWORK TOPOLOGY
1. The type of computers to be installed
2. The type of cables needed
3. The distance between each computer
4. The speed with which data must travel around the
work
5. The future growth or expansion of the network

7. STAR TOPOLOGY
• A star topology, sometimes known
as a star network, is a network
topology in which each device is
connected to a central hub. It is one
of the most prevalent computer
network configurations. There are a
lot of examples of star topology in
real life also, and you can see Star
Network Topology Examples in
Airports, Hospitals, Banks, and
Educational Institutes

8. Advantages And Disadvantages Of A Star
Topology
Advantages
1. Easy to install and wire
2. Easy to detect faults and
to remove parts
3. No disruption to the
network when connecting
or removing devices.
Disadvantages
1.Requires more cable length than
a linear topology
2.If the hub, switch, or concentrator
fails, nodes attached are disabled
3.More expensive than linear bus
topologies because of the cost of
the hubs.

9. BUS TOPOLOGY
A bus network
consists of a
single central
cable, to which
all computers
and other
devices connect.

10. RING TOPOLOGY
A ring topology is a network
configuration where device
connections create a circular data
path. Each networked device is
connected to two others, like
points on a circle. Together,
devices in a ring topology are
called a ring network.

12. MESH TOPOLOGY
Mesh topology is a type of
networking in which all the
computers are inter-
connected to each other. In
Mesh Topology, the
connections between
devices take place
randomly.

14. TYPES OF COMPUTER NETWORK
There several types of computer networks. The following are some
types of computer networks
1. Personal Area Network (PAN)
2. Local Area Network(LAN)
3. Wide Area Network (WAN)
4. Metropolitan Area Network (MAN)
5. Campus Area Network (CAN)

15. PERSONALAREA NETWORK (PAN)
• Personal Area Network (PAN)
offers to make connections of
multiple devices or other equipment
under the single user’s environment
within 10 meters to 30 feet. These
types of connections can be done
wired or wireless. PAN network
enables with few computer devices,
telephones, video game consoles,
electronic devices, laptop, PDAs,
printers, smart phone, and other
wearable computer devices.

16. LOCALAREA NETWORK (LAN)
• Local area network is
collection of devices
connected together in one
physical location, such as
a building, office, or
home.

18. WIRELESS LOCALAREA NETWORK
(WLAN)
A wireless LAN (WLAN) is
a wireless computer
network that links two or
more devices using wireless
communication to form a
local area network (LAN)
within a limited area such as
home, school, computer
laboratory, campus, or office
building.

19. METROPOLITAN AREA NETWORK
(MAN)
A metropolitan area network is a network which covers a city or a large
university campus. MAN connect users within an area larger than the
Local area network (LAN) but smaller than a wide area network
(WAN).
Examples of MAN
1. Used in public libraries 5. A network of fire stations
2. In airports 6. Cable broadband
3. University campuses
4. In hospital

20. Pictures of man

21. ADVANTAGES AND DISADVANTAGES OF
METROPOLITAN AREA NETWORK (MAN)
ADVANTAGES DISADVANTAGES
1. Less expensive 1. Difficult to manage
2. Sending local emails 2. Hackers attack
3. High Security 3. More wires required
4. High speed than WAN 4. Internet speed difference

22. WIDE AREA NETWORK (WAN)
A Wide Area Network (WAN) is a computer network that
covers large geographical area. It covers areas such as a city, country or
span even intercontinental distances.
Some examples of WAN are below
1. Internet
2. Airline companies
3. satellite system
4. Cable companies
5. Network providers

23. ADVANTAGES DISADVANTAGES
1. Cover large geographical area 1. security problems
2. Centralized data 2. The setup cost is high
3. Get updated files and data 3. Troubleshooting problems
4. Sharing of software and resources 4. Server down and
5. Global business disconnection issue

24. CAMPUS AREA NETWORK (CAN)
Campus Area Network (CAN)
network links couples of local
area networks with small
geographical space. CAN is
larger than LAN but it’s smaller
compared to WAN and MAN
networks.

25. ADVANTAGES
1. Affordability
2. Higher speed
3. Protection
4. Easy accessibility of data
DISADVANTAGES
It has a limit to the number of nodes that can be connected
Campus area network (CAN) maintenance is 1.it has a limit to the
number of nodes that can be connected
Campus area network (CAN) maintenance is more costly to another
more costly to another network such as LAN, WAN.