Hexadecimal is used for MAC addresses. Part of a MAC address is given: 97–5C–E1 Each pair of digits is stored as binary in an 8-bit register.

Mark scheme

Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.

1. [1] (for 97, first nibble) 1 0 0 1
2. [1] (for 97, second nibble) 0 1 1 1
3. [1] (for 5C, first nibble) 0 1 0 1
4. [1] (for 5C, second nibble) 1 1 0 0
5. [1] (for E1, first nibble) 1 1 1 0
6. [1] (for E1, second nibble) 0 0 0 1
7. [1] Media Access Control (address)
8. [1] Used to identify a device
9. [1] It is a unique (address)
10. [1] It is a static address // It does not change
11. [1] It is set by the manufacturer
12. [1] The first part is the manufacturer ID/number/identifies the manufacturer
13. [1] The second part is the serial number/ID
14. [1] Colour codes // Colour in HTML / CSS
15. [1] Error messages
16. [1] Locations in memory
17. [1] Memory dump // debugging
18. [1] IP address
19. [1] ASCII // Unicode
20. [1] Assembly language
21. [1] URL