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IGCSE Unit 2

Authored by Louise Russell

Computers

9th - 12th Grade

Used 7+ times

IGCSE Unit 2
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22 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Data Transmission when data is transmitted both ways at the same time

Serial

Simplex

Full duplex

Half duplex

2.

FILL IN THE BLANK QUESTION

30 sec • 1 pt

________ is the term used to describe the message before it is encrypted?

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

_____________ is unreadable text generated after encryption.

plaintext

ciphertext

encrypted message

session key

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following describes the check where the receiving computer sends back a copy of the data to the sending computer to allow it to compare the data?

echo check

checksum

ARQ

check digit

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these is not part of the header:

Packet Number

Protocol

Receiver IP address

Data

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

An extra bit added to a string of binary code to ensure the number of 1-bits are either even or odd, depending on the system used:

ARQ

Checksum

Parity Check

Check Digit

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The final number in a code of numbers. It is calculated from all the other numbers in the code. It’s purpose is to spot errors on data entry

ARQ

Checksum

Parity Check

Check Digit

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