Edexcel GCSE Computer Science (1CP2) Exam Questions

• B Sends it on to the next router (1)
• The only correct answer is B. The correct answer is sends it on to the next router.
• A is not correct because a packet is given its number by the sending computer before it is sent
• C is not correct because packets are put back into order by the receiving computer
• D is not correct because the original file is rebuilt by the receiving computer once all the packets arrive

Award one mark for:

• 0 to 255 (1)

Allow 0–255 / 0-255 / between 0 and 255 / 0 and 255.

Do not accept 1 to 255 (0 is a valid value).

Do not accept any range that includes 256, e.g. 0 to 256.

Award up to two marks for a linked explanation such as:

• A LAN covers a small geographical area (1) because all the charity's computers are in one building/on one site (1)
• The charity can use its own cabling/equipment (1) so it does not need to rent leased lines from a telecoms provider (1)
• The charity owns the infrastructure (1) so it avoids the cost of leased lines/external connections that a WAN needs (1)
• The devices are close together (1) so the LAN can use short, high-speed cabling (1)

For both marks, the expansion must follow/associate with the statement.

Do not accept 'it is faster/better/cheaper' on its own without a linked reason (e.g. short distance, own cabling, no leased lines).

Allow 'the LAN is private/secure' only with a linked reason such as the charity controls its own equipment.

Do not accept 'a LAN is local' or 'a WAN is too far/expensive' without a linked reason about the small area or leased lines.

Do not accept 'the computers are in one building/on one site' on its own because it repeats the stem; it must be linked to a reason such as a LAN covering a small geographical area.

Do not accept 'stronger Wi-Fi/signal' as a reason.

Do not accept 'can share files/printers' on its own because this is a reason for any network, not for choosing a LAN over a WAN.