CompTIA Network+ Practice Exam –
Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A |
Instant Download Pdf
1. Which layer of the OSI model is responsible for path determination and
logical addressing?
A. Data Link
B. Transport
C. Network
D. Session
The Network layer handles IP addressing and routing between networks.
2. What protocol is used to automatically assign IP addresses to devices on a
network?
A. DNS
B. DHCP
C. ARP
D. ICMP
DHCP dynamically assigns IP addresses and other configuration parameters.
3. Which of the following is a connection-oriented protocol?
A. UDP
B. TCP
C. ICMP
D. IP
TCP provides reliable, ordered, and error-checked delivery.
,4. What device operates at Layer 2 of the OSI model?
A. Switch
B. Router
C. Hub
D. Firewall
Switches operate at the Data Link layer, forwarding frames based on MAC
addresses.
5. Which type of cable uses light to transmit data?
A. Twisted pair
B. Coaxial
C. Fiber optic
D. Plenum
Fiber optic cables use light signals for high-speed and long-distance
communication.
6. What is the default subnet mask for a Class C network?
A. 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
D. 255.255.255.255
A Class C network uses 24 bits for the network portion.
7. Which port is used by HTTPS?
A. 20
B. 21
C. 80
D. 443
HTTPS uses port 443 for secure web communication.
8. Which protocol translates domain names to IP addresses?
, A. DNS
B. DHCP
C. FTP
D. SNMP
DNS resolves human-friendly domain names into IP addresses.
9. Which of the following devices separates broadcast domains?
A. Switch
B. Router
C. Hub
D. Bridge
Routers separate broadcast domains by dividing networks.
10. What is the function of a VLAN?
A. To provide wireless access
B. To segment networks logically
C. To assign IP addresses
D. To filter MAC addresses
VLANs divide a network into logical segments, improving efficiency and
security.
11. What type of attack involves capturing packets to read data like
passwords?
A. DDoS
B. Packet sniffing
C. Spoofing
D. Phishing
Packet sniffing captures network traffic for analysis.
12. Which protocol does ping use?
A. TCP
B. ICMP
Questions And Correct Answers (Verified
Answers) Plus Rationales 2025/2026 Q&A |
Instant Download Pdf
1. Which layer of the OSI model is responsible for path determination and
logical addressing?
A. Data Link
B. Transport
C. Network
D. Session
The Network layer handles IP addressing and routing between networks.
2. What protocol is used to automatically assign IP addresses to devices on a
network?
A. DNS
B. DHCP
C. ARP
D. ICMP
DHCP dynamically assigns IP addresses and other configuration parameters.
3. Which of the following is a connection-oriented protocol?
A. UDP
B. TCP
C. ICMP
D. IP
TCP provides reliable, ordered, and error-checked delivery.
,4. What device operates at Layer 2 of the OSI model?
A. Switch
B. Router
C. Hub
D. Firewall
Switches operate at the Data Link layer, forwarding frames based on MAC
addresses.
5. Which type of cable uses light to transmit data?
A. Twisted pair
B. Coaxial
C. Fiber optic
D. Plenum
Fiber optic cables use light signals for high-speed and long-distance
communication.
6. What is the default subnet mask for a Class C network?
A. 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
D. 255.255.255.255
A Class C network uses 24 bits for the network portion.
7. Which port is used by HTTPS?
A. 20
B. 21
C. 80
D. 443
HTTPS uses port 443 for secure web communication.
8. Which protocol translates domain names to IP addresses?
, A. DNS
B. DHCP
C. FTP
D. SNMP
DNS resolves human-friendly domain names into IP addresses.
9. Which of the following devices separates broadcast domains?
A. Switch
B. Router
C. Hub
D. Bridge
Routers separate broadcast domains by dividing networks.
10. What is the function of a VLAN?
A. To provide wireless access
B. To segment networks logically
C. To assign IP addresses
D. To filter MAC addresses
VLANs divide a network into logical segments, improving efficiency and
security.
11. What type of attack involves capturing packets to read data like
passwords?
A. DDoS
B. Packet sniffing
C. Spoofing
D. Phishing
Packet sniffing captures network traffic for analysis.
12. Which protocol does ping use?
A. TCP
B. ICMP
