Unit 4: Internet. Security and responsability. (Personal Safety Threats to…
Unit 4: Internet. Security and responsability.
How the Internet Works
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.
A computer prepared to provide services
simultaneosly to lots of usuers
Browser: Programming that displays the content of web
URL: Full addres of the webpage it appears in the address
bar in the browser. For example: www.iesja.es
A SEARCH ENGINE : Computer system that idexes files stored on websites it is updated by continually surveying the internet
Internet .It's a network of thousands of components
and dences around the world connected by.1965. USA Department of Defense)
The Internet Of Things (future)
Interact with everyday objects connected to the Internet
Personal Safety Threats to machine and to indivduals
Phishing (codes for bank accounts)
Damage to our identity or our image
Loss of privacy
viruses and troyans: Antivurses
It helps us know how secure our systems are
Tries to contain and steal date from users
DNS: Sever assigns a name to each IP address
Communication among compuers follows a set of rulles called PROTOCOL.
DNS: server sends the request to the server that hosts the
webpage we want to visit
TOP/IP: Pockets of info transfer control protocol internet
protocol (hypertext transder protocol) servers use this
protocol to send and recieve document
The server sends us the information packpage
The packets reach our computer and are reassembled. The page
is displayed in our browser.