Computing revision 2

Computing revision 2

1. Network Security

   • Firewall
     • A firewall is a barrier between a trusted secure international network or an untrusted outside network.
   • Anti Malware
     • Anti-Malware is to safeguard the computer from malware.
   • Passwords
     • A password has to be
       • Secure
       • Easy to remenber
       • Hard for other people to guess
       • Use a conbination of both letter and number and some thimes sybols. Also use both capital ans samel case leters
         • Example: CaB/9806
       • Not personal example; pets name, etc
       • Not from a dictionary
         • Since a computer can go over all the words in the dictionary very quick
     • Dont tell any one your password even your parents
       • And they might not be as cerful as you
     • Be carefull when you get an email that asques for your password because it might be a scam
     • Never tell any one your password though the phone
   • Encryption
     • A encryption is the most effective way to achieve data security. To read encypted file you must have a secret key or password that enables you to encrypt it.

2. Computer Components

   • CPU
     • Central Processing Unit
     • Fetches, decodes and executes instruction
     • Cores are independent processor in the Cpu that runs the fetche, decode, execute cycle simuntatianly
       • The number of cycles it can do is called clock speed
   • RAM
     • Stores the programs , parts of the operating system and giles currently being used.
     • It is not volatile meaning it does not state data when computer is turned of

3. Algorithms

4. Ethical

   • The issue of what is considered right or wrong by society

5. Cultoral

   • Values, belief and society behaviour of particular people or a society. The cultural issue are how particular group of people effected