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Edexcel GCSE Computer Science (1CP2) Exam Questions

Build a practice paper from 693 exam-style questions, each with its mark scheme and example answers. Print it, or answer it on paper and then open the mark schemes. Or browse the questions by topic.

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2 questions · 2 marks

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1Multiple choice1 markProtocols & Layers Swap Remove

The TCP/IP model is made up of four layers.

Identify the layer that is responsible for routing packets.

[1 mark]
  • AApplication
  • BInternet
  • CLink
  • DTransport
Mark scheme
  • B Internet (1)
  • The only correct answer is B. The correct answer is Internet.
  • A is not correct because the application layer creates data for applications such as web browsers and does not route packets
  • C is not correct because the link layer sends data over physical hardware using MAC addresses and does not route packets
  • D is not correct because the transport layer sets up the connection between two computers and reassembles the packets
Example answers and how they were marked
Full marks1/1

B Internet

Why: The internet layer is responsible for routing packets (1).

No marks0/1

A Application

Why: The application layer creates data for applications such as web browsers and does not route packets (0).

No marks0/1

C Link

Why: Confuses the link layer with the internet layer: the link layer sends data over physical hardware using MAC addresses and does not route packets (0).

2Short recall1 markNetwork Speed Swap Remove

Network speed is used to describe data transmission.

State the unit in which network speed is measured.

[1 mark]
Mark scheme

Award one mark for any of the following:

  • Bits per second (bps) (1)
  • Kilobits per second (kbps) (1)
  • Megabits per second (Mbps) (1)
  • Gigabits per second (Gbps) (1)

Allow bits/second, b/s, bit per second, bits per sec.

Do not accept bits on its own.

Do not accept bytes per second.

Example answers and how they were marked
Full marks1/1

Bits per second

Why: Gives the correct unit (1).

No marks0/1

Bits

Why: Only part of the unit is given; 'per second' is missing and bits on its own is not accepted (0).

No marks0/1

Bytes per second

Why: Confuses bits with bytes; bytes per second is not accepted (0).

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