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Computer Network

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miguel fernandes

on 14 November 2013

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Transcript of Computer Network

Computer Network
use of Wi-Fi and Bluetooth?
set up a small network

advantages and disadvantages of networking
a router is what connects two or more computer networks

what is a router?
Bluetooth is used for sending something to another device without wires
Wi-Fi allows a device to have access to the internet wirelessly
advantages: File can easily be shared between users
disadvantages: network cabling and servers can be expensive

advantages and disadvantages o using internet
advantages
Information on almost every subject imaginable.
Free mail service to anyone in the country.
disadvantages
false information, everyone can post is on the internet
hacker can get virus to your computer and damage valuable data
what is ID
Identification Device is a name given to a user for accepting a computer system, database


what is password
A secret word or phrase that one uses to gain admittance or access to information.
methods of communication
a device that can send or receive pictures and text over a telephone line.
fax

email
is text messages that may contain files, images, or other attachments sent through a network to a specified individual or group of individuals.
bulletin boards
is a surface intended for the posting of public messages
tele/video conferencing
it is a conference between two or more participants at different sites by using computer networks
Local Area Network (LAN)
is a computer network that interconnects computers in a limited area such as a home, school, computer laboratory, or office building using network media.
Wireless Area Network (WLAN)
a local area network that uses high frequency radio signals to transmit and receive data over distances of a few hundred feet
Wide Area Network (WAN)
A computer network that spans a relatively large geographical area.
difference between a LAN and a WAN
a LAN is a network that is geographically small, as in the WAN is the opposite it can be a regional or even national network
Internet
internet is a electronic communications network that connects computer networks and organizational computer facilities around the world
intranet
a network that works like the Internet but can only be used by certain people e.g company employees
Network Devices
hubs
commonly used to connect segments of a LAN.
bridges
the action taken by network equipment to allow two or more communication networks
switches

is a computer networking device that links network segments or network devices.
proxy server
This is a server that all computers on the local network have to go through before accessing information on the Internet.
encryption
authentication
the process of encoding messages or information in such a way that hackers cannot read it
identifying an individual, usually based on a username and password.

router
client


client



client
modem
ISP
INTERNET
Techniques
Password
For a safer password there is a need of variation and quantity of characters. Try to use more than 8 characters. Use a mixture of lower caps and upper caps to maximize the options. also use numbers and other things for example @ or _. to see if your password is safe go to: https://howsecureismypassword.net/
Users ID or Username
For every username or users ID need to be identical.
Full transcript