Unit 4: Computer Systems & Networks
CS Principles · Unit 4 · Paper 1

Computer Systems & Networks unit test

A test on this unit alone, marked as a percentage and a letter grade — for the test your class is actually sitting, rather than for May. Answer everything, then submit once: seeing the answer to question 3 before attempting question 4 makes the final percentage meaningless.

Paper 1Paper 2Paper 3
Each paper is built from this unit’s 28 terms and is the same for everyone, so a teacher can assign “Unit 4, Paper 1” and every student sits the identical test. Multiple choice is marked objectively; the written sections you mark yourself against the model answer and rubric.
Suggested time 33 min 30 points0/17 attempted
1

DNS

2

Bit rate

3

Packet switching

4

Scalability of the Internet

5

Computer network

6

TCP

7

Protocol

8

World Wide Web vs the Internet

9

Computing system

10

Redundancy

11

HTTP

12

UDP

Short answer 1. Define or explain: Fault tolerance

3 pts

Short answer 2. Define or explain: Why a network diagram question is about paths

3 pts

Short answer 3. Define or explain: Open protocol

3 pts

Short answer 4. Define or explain: Parallel computing on a network

3 pts

Free response

6 pts

A company stores customer data on servers in several countries and transmits it over the internet.

Describe how data is transmitted across the internet using packets, and explain one advantage of packet switching over sending data as a single unit.

Explain the difference between the internet and the World Wide Web.

Describe what encryption accomplishes and explain the difference between symmetric and public key encryption.

Explain one way the company's practice of storing data in several countries could create a risk for customers.