Unit 4: Internet. Security and responsability. (Internet basics (BROWSER :…
Unit 4: Internet. Security and responsability.
Personal SAFETY and machine Security
Threats to machine and to individuals
Black hackers : tries to ontain data from usuers
White hackers : they help to know how secure systems are.
Spyware : Firewall
Phishing (codes for bank accounts)
Vyruses and troyans : Antiviruses
Loss of privacy
Damage to our identify or image
How The Internet
Contract with an Internet service provider (ISP) It assigns an adress IP to our computer webpage is also assigned an IP.
Router and browser
We type the adress of the page (URL) the information starts to travel in the form of packets.
: Server assigns a name to each IP adress
Communication among compuers follows a set of rules called
Server sends the request to the server that hosts the webpage we want to visit
The server sends us the information packpage
The packets reach our computer and are reassembled. The page is displayed in our browser.
Pockets of info transfer control protocol internet protocol
(hypertext transder protocol) servers use this protocol to send and recieve document
server sends the request to the server that hosts the webpage we want to visit
A SEARCH ENGINE : Computer system that idexes files stored on websites it is updated by continually surveying the internet
: Programming that displays the content of web pages
: Full addres of the webpage it appears in the address bar in the browser. For example: www.iesja.es
: A computer prepared to provide services simultaneosly to lots of usuers
THE INTERNET OF THINGS
(In the future)
Interact with everyday objects connected to the Internet eliminating
: It's a network of thousands of components and dences around the world connected by.
(1965. USA Department of Defense)
Wire less connections