Photo AI
A cloud storage provider installs new servers - Edexcel - GCSE Computer Science - Question 6 - 2021 - Paper 1
Question 6
A cloud storage provider installs new servers. (a) The data on the servers is encrypted. Identify one encryption technique. (b) Describe how hardware and software... show full transcript
Worked Solution & Example Answer:A cloud storage provider installs new servers - Edexcel - GCSE Computer Science - Question 6 - 2021 - Paper 1
Step 1
Step 2
Describe how hardware and software work together to start a computer.
Answer
When a computer is started, the following process occurs:
-
Power-On Self Test (POST): The hardware is initialized when the computer is powered on. The CPU begins executing firmware instructions from the ROM that perform a POST. This checks the hardware components like the RAM, keyboard, and storage devices for any errors.
-
Boot Loader: After successfully completing POST, the BIOS (part of the firmware) searches for the bootable device where the operating system is stored. It then loads the boot loader from the device into memory.
-
Operating System Initialization: The boot loader loads the operating system into RAM. Once the OS is in memory, it initializes system services, manages hardware resources, and allows users to interact with the computer through software applications.
Step 3
Compare the storage media options available to a cloud storage provider.
Answer
When comparing storage media options for a cloud storage provider, we can analyze Hard Disk Drives (HDDs) versus Solid State Drives (SSDs).
1. Cost and Capacity
- HDDs typically offer higher storage capacity at a lower cost compared to SSDs, making them suitable for archival purposes.
- SSDs, while more expensive, provide lower capacity options that are useful for high-performance applications.
2. Speed and Performance
- HDDs are slower due to their mechanical components, particularly in terms of read/write speeds, leading to longer access times.
- SSDs provide significantly faster access speeds due to their lack of moving parts, which is beneficial for applications requiring quick data retrieval.
3. Reliability and Durability
- HDDs can be more vulnerable to physical damage due to their moving parts, which increases the risk of data loss.
- SSDs have no moving parts, making them more resistant to shocks and offering better durability over time.
4. Application Use Cases
- HDDs are often chosen for data storage needs where speed is not critical, while SSDs are preferred for applications requiring quick data access, like databases and virtual machines.
In summary, the choice between HDDs and SSDs depends on the specific requirements regarding cost, capacity, speed, and use cases.