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CompTIA Network+ Quiz

by Aime RyanPublished: February 27, 2026

Dive into the intricate world of networking with our CompTIA Network+ Quiz, designed to challenge and enhance your understanding of essential networking concepts. Whether you’re prepping for the certification exam or simply brushing up on your skills, this quiz will provide a thorough assessment of your knowledge. Good luck and enjoy the challenge!
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CompTIA Network+ Quiz
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1. Which layer of the OSI model is responsible for data encryption?
Consider the OSI model’s functions.

CompTIA Network+ Quiz Questions Overview

1. Which layer of the OSI model is responsible for data encryption?

Layer 1 – Physical
Layer 4 – Transport
Layer 6 – Presentation
Layer 7 – Application

2. What is the primary purpose of a VLAN?

To increase network speed
To create a virtual network within a physical network
To connect different networks
To provide wireless connectivity

3. Which protocol is used for secure remote login?

FTP
Telnet
SSH
SMTP

4. What does the acronym DHCP stand for?

Dynamic Host Configuration Protocol
Data Host Control Protocol
Dynamic Hypertext Control Protocol
Data Hypertext Configuration Protocol

5. Which device operates at the Data Link layer of the OSI model?

Router
Switch
Hub
Repeater

6. What is the default port number for HTTP?

20
21
80
443

7. Which of the following is a characteristic of a peer-to-peer network?

Centralized control
Scalability
Equal privileges for all devices
High security

8. What is the primary function of a firewall?

To increase network speed
To filter incoming and outgoing traffic
To connect different networks
To provide wireless connectivity

9. Which protocol is used to convert a domain name into an IP address?

FTP
DNS
HTTP
SMTP

10. What is the purpose of the ARP protocol?

To assign IP addresses
To resolve IP addresses to MAC addresses
To transfer files
To send emails

11. Which of the following is a characteristic of the TCP protocol?

Connectionless
Unreliable
Guaranteed delivery
Broadcast communication

12. What type of cable is commonly used for Ethernet networks?

Coaxial cable
Fiber optic cable
Twisted pair cable
Serial cable

13. Which layer of the OSI model is responsible for routing?

Layer 2 – Data Link
Layer 3 – Network
Layer 4 – Transport
Layer 5 – Session

14. Which of the following is a private IP address?

8.8.8.8
192.168.1.1
172.16.0.1
10.0.0.1

15. Which command is used to test network connectivity?

ipconfig
ping
netstat
tracert

16. What is the function of a proxy server?

To increase network speed
To filter and cache requests
To connect different networks
To provide wireless connectivity

17. Which protocol is used for sending email?

FTP
HTTP
SMTP
SNMP

18. Which wireless standard operates at both 2.4 GHz and 5 GHz frequencies?

802.11a
802.11b
802.11g
802.11n
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