from the questions jayjayhilts provided ive answered:
if anyone can add answers or questions then please do
these questions are not in exact order
( PLEASE NOT IF YOUR ANSWER IS NOT HERE THEN IT DOES NOT MEAN IT IS WRONG)
1- Fill in blanks on CPU (5 marks) - Central Processing Unit, Instructions, Memory, Arithmetic Logic Unit, Control Unit
2- Why having dual cores might be better (2 marks) - can theoretically perform twice as many instructions per second as instructions are executed simultaneously ( might be better as some programs are sequential meaning only one core is neccessary)
3- Why having more cache is better (2 marks) - cache is very fast, close to cpu, bigger size cache = more frequently used data can be stored meaning instructions can be executed faster
4- RAM/ROM tickboxes (5 marks) - both store data, ram is volatile, rom is non volatile, ram stores currently running programs, rom stores bios
5- Example of Solid State device and primary or secondary storage (2 marks) - USB ( Memory Stick) - Secondary storage
6- Solid State vs optical (8 marks)
Solid State
- less portable in comparison to optical drive
- faster
- higher cost per gb
- more reliable
- more robust/durable ( no moving parts)
- bigger capacity
Optical Drive:
- more portable
- lower cost per gb
( conclusion of either ssd or optical is okay as long as points support it)
7- GB -> MB conversion (2 marks) 5000 or 5120
8- File management uses (3 marks) - organising files, creating file extensions for programs to open files, modifiying deleting/removing files
9- Compression (4 marks) - compressing reduces file size = quicker download/upload to the internet - lossy - loses data cannot be decompressed to its original form
lossless - reduces file size less compared to lossy however can be decompressed to its original form
10- Utility software two examples (2 marks) - encryption, backup, compression, defragmentation
11- Embedded system Smartwatch v laptop and why (3 marks) - watch ( embedded system is a computer build into another device ) watch has a computer that has a specific purpose, laptop is for multiple purposes
12 - ascii ( caesar cipher question)
its not letting me put the answers here
13- Star topology diagram (3 marks) - switch in the middle - spider diagram - 4 laptops a printer and a server connected to the switch
14- Use of a switch (2 marks) - central point of communication, directs and coordinates data flow on the network
15- Why is it bad if get into confidential files (3 marks) - malware- could infect computer which can affect the whole network
sensitive data, personal informaiton can be leaked etc
16- protecting on a network (4 marks)(i think? or was it 3?) firewall, controls data that enters and leaves networked computer, flags potential threats
pentration testing, to identifiy vulnerabilities and fix them
17- protocols (4 marks)
18- IP address/URL/webserver (5 marks)
So basically you had to describe the relationship.
Urls and ip’s are related to eachother and stored on DNS’s ( Domain name System )
Once u enter the url the web server sends a request to the local dns to find the relating IP adress so that a connection can be established. If the dns cant find it the dns sends a request to another dns and this repeats till the ip is found and sent back to the web server.
The relationship between them is a client server relationship.
The web server acts as a client when it sends s request for the IP, the Dns can act as a client or a server. It is a server when it processes and sends back the Ip address but when the dns has ro contsct other dns’ the orginal dns becomes a client and the other dns becomes the server
19- Why use layers( applicaiton and network) (3 marks) self contained, can change one without affecting other layers, layers are group of protocols, protocols are a set of rules dor data transmission, layers as a whole manage data transmission over a network. TCP is responsible for ensuring packets are sent/recieved as well as for splitting up data into packets
20- How encryption works (2 marks)(I think? or was it 3?) - masking of data to prevent unauthorised access, only owner knows the key
21- Why good for environment to release game online (2 marks) - no need to use materials to create a case for the game - case can be made out of raw materials ( non renewable resources ) selling game online saves material.
22- Why proprietary is better than open source (2 marks) - proprietary allows for money to be made, source code is private therefore competitiors cant see the code.
23- Difference between RAM and flash (1 mark) - ram is volatile flash memory is not