Network and Wifi
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Transcript Network and Wifi
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
http://wifi-aztechno.ucoz.ua/32dcf6851b.jpg
http://siliconangle.com/files/2012/09/wi-fi-network-signal-300x300.png
http://upload.wikimedia.org/wikipedia/commons/0/00/Virtual_Private_Network_overview.svg