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CCNA Network Fundamentals: Bits, Bytes, Bandwidth, Latency, and Throughput
Computer Networking
This lesson covers fundamental networking measurement units including bits, bytes, bandwidth, latency, and throughput. It explains why electronics use binary systems, how these units are measured at scale, and the differences between them, using analogies to clarify concepts.
networking
data units
performance
27 Questions
Easy
Ages 14+
Mar 4, 2026
About this Study Set
This study set covers Computer Networking through
27 practice questions.
This lesson covers fundamental networking measurement units including bits, bytes, bandwidth, latency, and throughput. It explains why electronics use binary systems, how these units are measured at scale, and the differences between them, using analogies to clarify concepts. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 27 questions from the
CCNA Network Fundamentals: Bits, Bytes, Bandwidth, Latency, and Throughput study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
What is the smallest unit of information in networking?
-
A
Byte
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B
Bit
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C
Kilobit
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D
Megabit
2
Why do electronics use a base-2 binary system instead of base-10 decimal?
-
A
It is mathematically simpler for humans.
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B
Binary digits (0 and 1) match physical states (on/off) easily.
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C
Decimal numbers require more complex circuitry.
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D
It allows for faster data processing.
3
What does a '1' typically represent in the flashlight analogy for transmitting bits?
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A
Flashlight is off
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B
Flashlight is on
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C
Signal is low voltage
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D
No current
4
Which unit measures how many bits are sent per second?
5
How many bits are in a kilobit (Kbps)?
-
A
100
-
B
1,000
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C
1,000,000
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D
1,000,000,000
6
What is a byte historically defined as in computing?
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A
The smallest unit of data
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B
The number of bits to store one character
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C
1000 bits
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D
The capacity of a network link
7
How many bits are in a standard byte?
8
How do bytes scale in computing (e.g., KB to MB)?
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A
Multiples of 1,000
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B
Multiples of 1,024
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C
Multiples of 10
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D
Multiples of 2
9
Which unit is used to measure data size and digital storage?
10
What is bandwidth defined as?
-
A
The actual data rate achieved
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B
The time it takes for a packet to travel
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C
The theoretical maximum data capacity of a link
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D
The variation in latency
11
Bandwidth is measured in which units?
-
A
Bytes per second (Bps)
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B
Bits per second (bps)
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C
Kilobytes per second (KBps)
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D
Megabytes per second (MBps)
12
What is throughput?
-
A
The theoretical maximum data capacity
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B
The actual data rate observed
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C
The time for data to travel from source to destination
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D
The number of bits in a byte
13
Which factor can reduce throughput compared to bandwidth?
-
A
Higher signal voltage
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B
Increased bandwidth
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C
Congestion and errors
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D
Using binary over decimal
14
What does "speed" in networking sometimes refer to?
-
A
Only link rate
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B
Only throughput
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C
Link rate, throughput, or both
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D
Only latency
15
What is latency?
-
A
The time it takes for a packet to travel from source to destination
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B
The total data capacity of a link
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C
The actual data rate achieved
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D
The variation in packet arrival times
16
Round-trip time (RTT) is the time for data to travel:
-
A
From source to destination only
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B
From destination back to source only
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C
To the destination and back to the source
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D
Across the entire network topology
17
In the water pipe analogy, what does the width of the pipe represent?
-
A
Throughput
-
B
Latency
-
C
Bandwidth
-
D
Packet loss
18
In the water pipe analogy, what does the actual amount of water flowing represent?
-
A
Bandwidth
-
B
Latency
-
C
Throughput
-
D
Jitter
19
What is jitter?
-
A
The time it takes for data to travel
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B
The variation in latency
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C
Packets that do not arrive
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D
The theoretical maximum capacity
20
What is packet loss?
-
A
The variation in latency
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B
The time delay for data
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C
Packets that do not arrive at their destination
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D
The maximum data capacity
21
When converting bits and bytes, remember that 1 byte equals how many bits?
22
You should expect throughput to be:
-
A
Higher than bandwidth
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B
Equal to bandwidth
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C
Less than bandwidth
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D
Irrelevant to bandwidth
23
Which of the following is an example of a unit for measuring network speed?
24
Which of the following is an example of a unit for measuring data size?
25
What does 'b' stand for when measuring bits per second?
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A
Bytes
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B
Bandwidth
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C
Bits
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D
Binary
26
What does 'B' stand for when measuring bytes?
-
A
Bits
-
B
Bandwidth
-
C
Binary
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D
Bytes
27
A Fast Ethernet interface typically has a capacity of:
-
A
10 Mbps
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B
100 Mbps
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C
1 Gbps
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D
10 Gbps
