Network and WiFi
By: Clara-Hannah S., Amelia H., and Margot d’I.
What is a Network

A network is the link between two or more computers, which allows them to share information,
exchange files, and communicate electronically

Computers on a network are linked through cables, telephone lines, radio waves, satellites, or infrared
light beams.
Types of Network

There are many types of Networks (WWAN, WLAN, etc.)

Nevertheless, the three main types of network are LAN, WAN, and MAN
What is LAN?

LAN stands for Local Area Network

This network is used throughout a relatively small area.

It is generally limited to a geographic area such as a writing lab, school, or building.
What is Wan?

WAN stands for Wide Area Networking

This network links networks in larger geographic areas such as a country in Europe and another in
South America

Special transoceanic cabling or satellite uplinks may be used to connect this type of global network.
What is MAN

MAN stands for Metropolitan Area Networking

This type of network connects computers together on a common network in the same city.
What is Topology

Topology is the geometric arrangement of a computer system or network

The common topologies are a bus, star and a ring
What is Protocol

The protocol is the set of rules and signals that computers on a same network use to communicate

The most popular protocol for LAN is called Ethernet

Another popular LAN protocol on PCs is the IMB (token-ring network)
What is architecture

The architecture of a network is its classification and its organization

Examples of architecture is: peer-to-peer or client/server architecture
What is network software?

A computer network, or data network, is a network of telecommunications. It allows computers to
exchange data. In computer networks, network computing devices pass data to each other along data
connections
What is network security?

The Network security is a policy made by a network administrator to prevent unauthorized access to
networks

To prevent a computer from getting a virus, there are antiviruses for the computer, but for the network,
there are routers and firewalls
• A firewall is a set of related programs that
protects the resources of a private network
from users from other networks
• A router is small physical device that joins
multiple networks together
What does WiFi stand for?

It stands for Wireless Fidelity

It allows people to access the internet or the network
What are 3G/4G/LTE

3G: is the third generation of mobile telephony technology

4G: is the fourth generation of mobile telephony technology, it is more efficient

LTE: Long Term Evolution marketed as 4G LTE
What is city wide WiFi

Free Wireless network that everyone can access: Starbucks, planes, trains

It is faster and easier to access
What is campus wide Wifi

It is a wireless WiFi that is spread throughout a whole school campus (LAN)
What are the advantages and disadvantages of WiFi

There are advantages and disadvantages of having and using WiFi

Advantages: one can have free signal or at a very low fee almost everywhere

Disadvantages: There are many security issues
What hardware needed for WiFi

Wired Network

Wireless Access Point

Wireless Adapter
What is Data Security Risk

Something called the IT security ensures the security of your computer; when in deficit, your computer
is not secured.

Data codes can be encrypted, leading to a virus.
What is “Range” and “Interference”

Range is the speed at which the network travels

Interference is when a Wi-Fi receptor interacts with another Wi-Fi receptor. Overcapacity can also
cause interference.
What are the advantages and disadvantages of installing a
school network?

There are many advantages and disadvantages to installing a school network such as :

Advantages: file sharing, sharing devices, sharing internet access, security, speed

Disadvantages: expensive to install, requires administrative time, servers fail, cables
may break, security and compliance.
Thank You for Listening!
Sources
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http://wifi-aztechno.ucoz.ua/32dcf6851b.jpg
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http://siliconangle.com/files/2012/09/wi-fi-network-signal-300x300.png
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http://upload.wikimedia.org/wikipedia/commons/0/00/Virtual_Private_Network_overview.svg