CompTIA Network+ Certification Exam
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. Which layer of the OSI model is responsible for logical addressing?
A. Physical
B. Data Link
C. Network
D. Transport
Answer: C
The Network layer is responsible for logical addressing such as IP
addresses and routing packets between different networks.
2. What device operates primarily at Layer 2 of the OSI model?
A. Router
B. Switch
C. Firewall
D. Gateway
, Answer: B
A switch operates at the Data Link layer and forwards frames
based on MAC addresses.
3. Which protocol is used to automatically assign IP addresses?
A. DNS
B. DHCP
C. FTP
D. SNMP
Answer: B
DHCP dynamically assigns IP addresses and configuration
settings to devices on a network.
4. What is the default port for HTTPS?
A. 21
B. 80
C. 443
D. 110
Answer: C
HTTPS uses port 443 to provide secure web communication over
TLS/SSL.
,5. Which topology connects all devices to a single central device?
A. Mesh
B. Bus
C. Star
D. Ring
Answer: C
A star topology connects all nodes to a central switch or hub.
6. What does DNS primarily do?
A. Assign IP addresses
B. Translate domain names to IP addresses
C. Encrypt traffic
D. Route packets
Answer: B
DNS resolves human-readable domain names into IP addresses.
7. Which protocol is connectionless?
A. TCP
B. FTP
C. UDP
, D. SMTP
Answer: C
UDP is connectionless and does not guarantee delivery or order
of packets.
8. What is the purpose of a subnet mask?
A. Encrypt data
B. Identify network and host portions of an IP address
C. Assign MAC addresses
D. Route traffic
Answer: B
A subnet mask separates the network portion from the host
portion of an IP address.
9. Which device forwards traffic based on IP addresses?
A. Switch
B. Router
C. Hub
D. Bridge
Answer: B
Questions With Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. Which layer of the OSI model is responsible for logical addressing?
A. Physical
B. Data Link
C. Network
D. Transport
Answer: C
The Network layer is responsible for logical addressing such as IP
addresses and routing packets between different networks.
2. What device operates primarily at Layer 2 of the OSI model?
A. Router
B. Switch
C. Firewall
D. Gateway
, Answer: B
A switch operates at the Data Link layer and forwards frames
based on MAC addresses.
3. Which protocol is used to automatically assign IP addresses?
A. DNS
B. DHCP
C. FTP
D. SNMP
Answer: B
DHCP dynamically assigns IP addresses and configuration
settings to devices on a network.
4. What is the default port for HTTPS?
A. 21
B. 80
C. 443
D. 110
Answer: C
HTTPS uses port 443 to provide secure web communication over
TLS/SSL.
,5. Which topology connects all devices to a single central device?
A. Mesh
B. Bus
C. Star
D. Ring
Answer: C
A star topology connects all nodes to a central switch or hub.
6. What does DNS primarily do?
A. Assign IP addresses
B. Translate domain names to IP addresses
C. Encrypt traffic
D. Route packets
Answer: B
DNS resolves human-readable domain names into IP addresses.
7. Which protocol is connectionless?
A. TCP
B. FTP
C. UDP
, D. SMTP
Answer: C
UDP is connectionless and does not guarantee delivery or order
of packets.
8. What is the purpose of a subnet mask?
A. Encrypt data
B. Identify network and host portions of an IP address
C. Assign MAC addresses
D. Route traffic
Answer: B
A subnet mask separates the network portion from the host
portion of an IP address.
9. Which device forwards traffic based on IP addresses?
A. Switch
B. Router
C. Hub
D. Bridge
Answer: B
