OCR GCSE Computer Science PAPER ONE MEMORISATION

Things to go over if ur interested in computer science PAPER ONE, watch it for fun. To the OCR GCSE spec, so you'll be fine.

6 Characteristics of suitable storage types

• Capacity

• Cost

• Speed

• Portability

• Durability

• Reliability

Sound file size formula

sound file size = sample rate x duration x bit depth

Image file size formula

• width x height x colour depth

(resolution * colour depth)

Text file size

number of characters * bits per character

Is the most significant bit on the left or right? [L R]

Left

6 protocols

• FTP

• TCP/IP

• HTTP(S)

• POP

• IMAP

• SMTP

3 email protocols and what they do

• POP - Download and delete from server (like a post office)

• IMAP - Access and manage emails from the server (.. ACCESS protocol)

• SMTP - Send emails from client to server (simple .. transfer)

6 threats to computer systems and networks

• Malware

• Social Engineering, e.g. Phishing

• Brute-force

• DoS/DDOS

• Data Interception

• SQL Injection

6 common prevention methods

• Penetration testing

• Anti-malware software

• Firewalls

• User access levels/permissions

• Passwords

• Encryption

• Physical security,

• Don’t write password on sticky notes, etc.

6 things that OSs do

• User interface

• Memory management

• Peripheral & Driver management

• User Management

• File management

• Multitasking

3 Utility Software

• Encryption software

• Defragmentation

• Data compression

8 marker - Impacts of digital technology on wider society

• Ethical issues

• Legal issues

• Cultural issues

• Environmental issues

• Privacy issues

8 markers - “Knowledge of a variety of examples of digital technology and how this impacts on society”

• Social media → -bias, hate, misinformation, manipulation, +safety

• AI → -job loss, +productivity

• CCTV → +security, -privacy, -ethicacy

• Streaming platforms → -cultural erosion, -copyright, -addiction, +content access

• Smartphones → +communication, +navigation, +contact, +info access, -distractions, -addictions, -surveillance

• Cloud storage → +remote work, -privacy, -data breaches

• Online shopping → +convenience, -local businesses, -packaging waste

• Cryptocurrency → +decentralised economy, -scams

• Self-driving cars → +accidents, -accidents?? -ethical, -driving jobs

• Wearable tech → +health tracking, +convencience, -radiation?

8 markers - 3 laws + licenses

• DPA 2018

• CMA 1990

• CDPA 1988

• Proprietary vs Open source