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Internet Security and Responsability (Definition: It´s a network of…
Internet Security and Responsability
Definition: It´s a network of thousans of computers and devices around the world connected by:
Fibre optics
Wireless connection
copper wires
other methods
The internet of things
interact with everyday objects connected to the internet eliminating: Distance and Time.
Internet Basic:
Search engine: Computer system that indexes files stored on websites. It is updated by continually surveying the internet: google, bing, yahoo.
URL: Full address of the webpage it appears in the address bar in the browser. ex: www.iesja.es
Browser: Programe that displays of web pages: int explorer, GOogle chrome, Mozilla firefox, Safari.
Server: a computer preparaded to provided services to simoultaneously to lots of users.
How internet works?
Contract with an internet service provided ISP, It assigns and address ip to your computer. Each webpage have an assigment ip.
Router and browser. We type the address of the page URL , the information starts to travel in the form of packets.
DNS service assigns a name to each IP address.
Communication amog coomputers follows a set of rules called a protocol.
TCP/IP packets of information. transfer control protocol, information protocol
DNS server sends the request to the server that hots we want to visit.
The server send us he information packets
the packets reach our computer and are reassembled. The page is displayed in our browser
HTTP: hypertext transfer protocol servers use this protocol to send and recieve documents.
Personal safety and machine security.: Threats to the machine and to individuals:
-indentify the thief
-phising(codes for bank account)
-loss of privacy
-damage to our identity or image (cyberbulling)
-spyware (firewall)
-try to obtain data from users fireball
-Black hackers
-white kackers
-crytography
-password