Igcse Ict Study Guide Graded A+

Modems {Ans: Modulator-demodulators. They were used before to connect devices to the internet before we had broadband connections. What they do is convert the digital data from the computer into an analogue signal so it can be sent over the telephone line. They can also reverse the process, turning analogue data from the telephone line into digital data that the computer can use.}Transaction autentiction number (TAN) {Ans: It is used in online banking servers, only the user should know this number.}Avoiding password interception {Ans: Passwords an be guessed, seen by others, stolen or hacked through. 1. Set up a strong password with letters and numbers. 2. Regularly change the password 3. Dont use the same password for all accounts. 4. Install spyware software blocking the installation of key logging software.}Turtle Graphics {Ans: 1. Forward n 2. Backward n 3. Left tº 4. Right tº 5. Penup 6. Pendown 7. Repeat n 8. End repeat}Internal Hardware Devices {Ans: Processor (CPU) Motherboard Random Access Memory (RAM) Read Only Memory (ROM) Video and Sound Card Internal Hard Disk Drive}The Internet {Ans: It is a huge collection of computers and networks that have been joined together in order