Bandwidth and network speed

Name:

Date:

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Quick Questions

Shade in the A or B circle for each question.

1. Which best describes bandwidth?

A The physical length of the network cable

B The amount of data a connection can carry in a given time

2. Which unit is usually used to measure bandwidth?

A MB (megabytes of storage)

B Mbps (megabits per second)

3. Ten people share one home Wi-Fi connection and all stream video at once. What is likely to happen?

A Each person gets less bandwidth, so things may slow down

B Each person gets extra bandwidth, so things speed up

4. Which is the download?

A Loading a video from a website onto your tablet

B Sending a photo from your tablet to a website

5. Which activity needs more bandwidth?

A Streaming a high-quality video

B Reading a plain text message

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1100 Mbps		Aeach_user = total_bandwidth / users
2upload_speed < download_speed		Bvideo_mbps > text_mbps
3Many users share one connection, so each person gets a smaller slice of the bandwidth		CA bandwidth measurement: the connection can carry up to 100 megabits of data every second
4Video needs more bandwidth than text because it contains much more data per second		DSending data out is usually slower than receiving data, as on most home connections
5bandwidth = 50 MB		EBandwidth is a rate, so it needs a unit per time such as Mbps. MB is a file size, not a speed.
6more_users = more_speed_each		FWrong idea: more users sharing a connection means LESS speed each, not more.

Definitions

bandwidth

Fill in the Blanks

Complete each line of code by filling in the missing parts.

Bandwidth is measured in ____

Watching a video uses ________ speed

videoMbps = 5 textMbps = 0.1 print(videoMbps _ textMbps)

Posting a photo online uses ______ speed

numUsers = 4 speedEach = 100 / ________

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A bandwidth = 100

B users = 4

C each = bandwidth / users

D print(each, "Mbps each"

Question 2

A video = 5

B text = 0.1

C if video < text:

D print("Video needs more")

Question 3

A download = 100

B upload = 20 Mbps

C if download > upload:

D print("Download faster")

Question 4

A Bandwidth = 50

B users = 2

C each = bandwidth / users

D print(each)

Question 5

A speeds = (10, 50, 100]

B best = max(speeds)

C print(best, "Mbps")

Answer Key

Bandwidth and network speed

Section A: Quick Questions

B — The amount of data a connection can carry in a given time

B — Mbps (megabits per second)

A — Each person gets less bandwidth, so things may slow down

A — Loading a video from a website onto your tablet

A — Streaming a high-quality video

Section B: Match the Pairs

100 Mbps → A bandwidth measurement: the connection can carry up to 100 megabits of data every second

upload_speed < download_speed → Sending data out is usually slower than receiving data, as on most home connections

Many users share one connection, so each person gets a smaller slice of the bandwidth → each_user = total_bandwidth / users

Video needs more bandwidth than text because it contains much more data per second → video_mbps > text_mbps

bandwidth = 50 MB → Bandwidth is a rate, so it needs a unit per time such as Mbps. MB is a file size, not a speed.

more_users = more_speed_each → Wrong idea: more users sharing a connection means LESS speed each, not more.

Section C: Definitions

bandwidth — The amount of data a network connection can carry in a given time, usually measured in Mbps. Shared by all users, so more people or video streaming means less speed each.

Section D: Fill in the Blanks

Bandwidth is measured in Mbps

Watching a video uses download speed

videoMbps = 5
textMbps = 0.1
print(videoMbps > textMbps)

Posting a photo online uses upload speed

numUsers = 4
speedEach = 100 / numUsers

Section E: Spot the Error

D — The print call is missing its closing bracket. It should be print(each, "Mbps each").

C — Video needs more bandwidth than text, so the test should be video > text. With < the message would never print.

B — Python cannot assign 20 Mbps because the unit is not valid code. It should be upload = 20.

A — The variable is created as Bandwidth, but line 3 uses bandwidth. Names are case-sensitive, so it should be bandwidth = 50.

A — The list opens with ( but closes with ]. The brackets must match: speeds = [10, 50, 100].