Tsvetelin's revision work.

Tsvetelin's revision work.

1. network

   • network security
     • Network security is any activity designed to protect the usability and integrity of your network and data
   • LAN/WAN/WPAN
   • Connection types
     • GPRS
       • a GPRS is a General Packet Radio Service is a packet oriented mobile data standard on the 2G and 3G cellular communication network's global system for mobile communications
     • Ethernet
       • A Ethernet is a family of computer networking technologies commonly used in local area networks, metropolitan area networks and wide area networks.
     • Bluetooth
       • A Bluetooth is a Bluetooth that is a wireless technology standard for exchanging data over short distances.
     • WiFi
       • WiFi stands for Wireless Fidelity and is the same thing as saying WLAN which stands for "Wireless Local Area Network.

2. Hardware

   • RAM
     • Random access memory (or simply RAM) is the memory or information storage in a computer that is used to store running programs and data for the programs.
   • CPU
     • A central processing unit is the electronic circuitry within a computer that carries out the instructions of a computer program by performing the basic arithmetic, logic, controlling, and input/output operations specified by the instructions.
   • Secondary Storage
     • Computer Hope. Alternatively referred to as external memory, secondary memory, and auxiliary storage, a secondary storage device is a non-volatile device that holds data until it is deleted or overwritten.
     • disadvantage
       • Secondary storage devices have at least two other advantages over RAM memory.
     • advantage
       • lash drives cost the most per megabyte, but due to their storage capacity and flexibility, quickly replaced floppy disks as the primary storage device for transferring data between computer when direct network transfer is not available.

3. firewalls

   • In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

4. Anti-malware

   • Antimalware (anti-malware) is a type of software program designed to prevent, detect and remove malicious software (malware) on IT systems, as well as individual computing devices.

5. Passwords

   • A password is a word or string of characters used for user authentication to prove identity or access approval to gain access to a resource (example: an access code is a type of password), which is to be kept secret from those not allowed access. The use of passwords is known to be ancient.

6. Encryption

   • Encryption refers to any process used to make sensitive data more secure and less likely to be intercepted by those unauthorized to view it.