CompTIA Network+ (N10-008/N10-009)
practice examQuestion And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A
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1. What device forwards packets between networks?
A. Hub
B. Switch
C. Router
D. Bridge
Rationale: A router connects and routes traffic between separate
networks.
2. Which OSI layer is responsible for encryption?
A. Network
B. Transport
C. Presentation
D. Session
Rationale: The Presentation layer handles data formatting,
compression, and encryption.
3. What protocol is used to automatically assign IP addresses?
A. DNS
B. HTTP
C. FTP
D. DHCP
, Rationale: DHCP dynamically assigns IP addresses and network
configuration.
4. Which cable type is most resistant to electromagnetic
interference?
A. UTP
B. STP
C. Coaxial
D. Fiber optic
Rationale: Fiber uses light instead of electrical signals, making it
immune to EMI.
5. What is the default port for HTTP?
A. 443
B. 21
C. 80
D. 25
Rationale: HTTP uses TCP port 80 by default.
6. Which protocol resolves IP addresses to MAC addresses?
A. DNS
B. ARP
C. DHCP
D. ICMP
Rationale: ARP maps IP addresses to MAC addresses on a local
network.
7. What topology uses a single central device to connect all nodes?
A. Bus
B. Ring
C. Star
, D. Mesh
Rationale: In a star topology, all devices connect through a
central hub or switch.
8. Which layer of the OSI model handles routing?
A. Data Link
B. Transport
C. Network
D. Application
Rationale: The Network layer is responsible for logical
addressing and routing.
9. What protocol is used to send email?
A. FTP
B. HTTP
C. SMTP
D. SNMP
Rationale: SMTP is used for sending electronic mail.
10. Which IP address is a private address?
A. 8.8.8.8
B. 1.1.1.1
C. 192.168.1.10
D. 216.58.214.14
Rationale: 192.168.x.x is part of the private IPv4 address range.
11. Which device filters traffic based on defined security rules?
A. Router
B. Firewall
C. Hub
D. Repeater
practice examQuestion And Correct Answers
(Verified Answers) Plus Rationales 2026 Q&A
Instant Download Pdf
1. What device forwards packets between networks?
A. Hub
B. Switch
C. Router
D. Bridge
Rationale: A router connects and routes traffic between separate
networks.
2. Which OSI layer is responsible for encryption?
A. Network
B. Transport
C. Presentation
D. Session
Rationale: The Presentation layer handles data formatting,
compression, and encryption.
3. What protocol is used to automatically assign IP addresses?
A. DNS
B. HTTP
C. FTP
D. DHCP
, Rationale: DHCP dynamically assigns IP addresses and network
configuration.
4. Which cable type is most resistant to electromagnetic
interference?
A. UTP
B. STP
C. Coaxial
D. Fiber optic
Rationale: Fiber uses light instead of electrical signals, making it
immune to EMI.
5. What is the default port for HTTP?
A. 443
B. 21
C. 80
D. 25
Rationale: HTTP uses TCP port 80 by default.
6. Which protocol resolves IP addresses to MAC addresses?
A. DNS
B. ARP
C. DHCP
D. ICMP
Rationale: ARP maps IP addresses to MAC addresses on a local
network.
7. What topology uses a single central device to connect all nodes?
A. Bus
B. Ring
C. Star
, D. Mesh
Rationale: In a star topology, all devices connect through a
central hub or switch.
8. Which layer of the OSI model handles routing?
A. Data Link
B. Transport
C. Network
D. Application
Rationale: The Network layer is responsible for logical
addressing and routing.
9. What protocol is used to send email?
A. FTP
B. HTTP
C. SMTP
D. SNMP
Rationale: SMTP is used for sending electronic mail.
10. Which IP address is a private address?
A. 8.8.8.8
B. 1.1.1.1
C. 192.168.1.10
D. 216.58.214.14
Rationale: 192.168.x.x is part of the private IPv4 address range.
11. Which device filters traffic based on defined security rules?
A. Router
B. Firewall
C. Hub
D. Repeater
