COMPTIA NETWORK+ (N10-009) CERTIFICATION EXAM COMPLETE PRACTICE TEST
BANK QUESTIONS AND ANSWERS | VERIFIED SOLUTIONS | UPDATED 2026/2027
STUDY GUIDE
Examiner/Administrator: CompTIA
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
COMPTIA NETWORK+ (N10-009) CERTIFICATION EXAM
2026/2027 EDITION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
COMPLETE PRACTICE EXAM
100+ MULTIPLE-CHOICE QUESTIONS
PASSING SCORE: 72%
TESTING TIME: 120 MINUTES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
TABLE OF CONTENTS
1. Networking Fundamentals
2. Network Implementations
3. Network Operations
4. Network Security
5. Network Troubleshooting
6. IP Addressing & Routing
7. Wireless Networking
8. Cloud & Virtualization
9. Network Services
10. Performance Optimization
COMPTIA CERTIFICATION PROGRAM || ALIGNED WITH CURRENT NETWORK+ N10-
009 BLUEPRINTS || ENTERPRISE NETWORKING TECHNOLOGIES || PROFESSIONAL
STUDY GUIDE || 100% VERIFIED | GRADED A+ || COMPREHENSIVE CERTIFICATION
PREPARATION || PREPARED FOR CERTIFICATION & PROFESSIONAL DEVELOPMENT ||
PROFESSIONAL EXAMINATION USE
,Networking Fundamentals (Q1–Q8)
Q1. A network engineer is designing a campus network that requires efficient
communication between devices on different VLANs while maintaining centralized
policy enforcement. Which device should primarily perform inter-VLAN routing?
A. Layer 1 Hub
B. Layer 2 Switch
C. Layer 3 Switch
D. Wireless Access Point
Correct Answer: 🔴 C. Layer 3 Switch
Explanation: 🔹 A Layer 3 switch provides routing functionality between VLANs
while maintaining high switching performance. Hubs operate only at the physical
layer, Layer 2 switches forward frames within the same VLAN, and access points
provide wireless connectivity rather than routing services.
Q2. An organization has implemented a star topology. What is the most significant
operational advantage of this design?
A. Lowest cabling requirements
B. Single cable failure impacts all devices
C. Easy fault isolation and management
D. No central device required
Correct Answer: 🔴 C. Easy fault isolation and management
Explanation: 🔹 In a star topology, each node connects to a central device, making
troubleshooting straightforward because individual link failures affect only one
device. Bus topologies typically use less cabling, while star networks require a
central switch or hub.
Q3. A company receives an IPv4 address block of 192.168.50.0/24 and needs at least
50 hosts per subnet. Which subnet mask is most appropriate?
,A. /27
B. /28
C. /26
D. /30
Correct Answer: 🔴 C. /26
Explanation: 🔹 A /26 subnet provides 64 addresses (62 usable host addresses),
satisfying the requirement for at least 50 hosts. A /27 supports only 30 hosts, a /28
supports 14 hosts, and a /30 supports only 2 usable addresses.
Q4. Which OSI layer is responsible for end-to-end communication, segmentation,
and reliability mechanisms?
A. Network Layer
B. Session Layer
C. Transport Layer
D. Data Link Layer
Correct Answer: 🔴 C. Transport Layer
Explanation: 🔹 The Transport Layer manages segmentation, flow control, error
recovery, and reliable delivery through protocols such as TCP. Network Layer
handles routing, while Data Link Layer manages local frame delivery.
Q5. An engineer captures traffic and observes MAC addresses but not IP addresses.
At which OSI layer is the captured information primarily operating?
A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 7
Correct Answer: 🔴 A. Layer 2
, Explanation: 🔹 MAC addresses are Data Link Layer identifiers. IP addresses belong
to Layer 3. Transport and Application layers operate higher in the OSI model and do
not directly use MAC addressing for communication decisions.
Q6. Which protocol is responsible for resolving an IPv4 address to a MAC address on
a local network?
A. DNS
B. ARP
C. DHCP
D. ICMP
Correct Answer: 🔴 B. ARP
Explanation: 🔹 Address Resolution Protocol (ARP) maps IPv4 addresses to MAC
addresses within a local broadcast domain. DNS resolves names, DHCP assigns
addresses, and ICMP handles diagnostic messaging.
Q7. A network administrator needs a protocol that provides connection-oriented
communication and guarantees delivery. Which protocol should be selected?
A. UDP
B. IP
C. TCP
D. ARP
Correct Answer: 🔴 C. TCP
Explanation: 🔹 TCP provides reliable, connection-oriented communication using
acknowledgments, sequencing, and retransmission. UDP prioritizes speed and low
overhead without delivery guarantees.
BANK QUESTIONS AND ANSWERS | VERIFIED SOLUTIONS | UPDATED 2026/2027
STUDY GUIDE
Examiner/Administrator: CompTIA
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
COMPTIA NETWORK+ (N10-009) CERTIFICATION EXAM
2026/2027 EDITION
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
COMPLETE PRACTICE EXAM
100+ MULTIPLE-CHOICE QUESTIONS
PASSING SCORE: 72%
TESTING TIME: 120 MINUTES
━━━━━━━━━━━━━━━━━━━━━━━━━━━━
TABLE OF CONTENTS
1. Networking Fundamentals
2. Network Implementations
3. Network Operations
4. Network Security
5. Network Troubleshooting
6. IP Addressing & Routing
7. Wireless Networking
8. Cloud & Virtualization
9. Network Services
10. Performance Optimization
COMPTIA CERTIFICATION PROGRAM || ALIGNED WITH CURRENT NETWORK+ N10-
009 BLUEPRINTS || ENTERPRISE NETWORKING TECHNOLOGIES || PROFESSIONAL
STUDY GUIDE || 100% VERIFIED | GRADED A+ || COMPREHENSIVE CERTIFICATION
PREPARATION || PREPARED FOR CERTIFICATION & PROFESSIONAL DEVELOPMENT ||
PROFESSIONAL EXAMINATION USE
,Networking Fundamentals (Q1–Q8)
Q1. A network engineer is designing a campus network that requires efficient
communication between devices on different VLANs while maintaining centralized
policy enforcement. Which device should primarily perform inter-VLAN routing?
A. Layer 1 Hub
B. Layer 2 Switch
C. Layer 3 Switch
D. Wireless Access Point
Correct Answer: 🔴 C. Layer 3 Switch
Explanation: 🔹 A Layer 3 switch provides routing functionality between VLANs
while maintaining high switching performance. Hubs operate only at the physical
layer, Layer 2 switches forward frames within the same VLAN, and access points
provide wireless connectivity rather than routing services.
Q2. An organization has implemented a star topology. What is the most significant
operational advantage of this design?
A. Lowest cabling requirements
B. Single cable failure impacts all devices
C. Easy fault isolation and management
D. No central device required
Correct Answer: 🔴 C. Easy fault isolation and management
Explanation: 🔹 In a star topology, each node connects to a central device, making
troubleshooting straightforward because individual link failures affect only one
device. Bus topologies typically use less cabling, while star networks require a
central switch or hub.
Q3. A company receives an IPv4 address block of 192.168.50.0/24 and needs at least
50 hosts per subnet. Which subnet mask is most appropriate?
,A. /27
B. /28
C. /26
D. /30
Correct Answer: 🔴 C. /26
Explanation: 🔹 A /26 subnet provides 64 addresses (62 usable host addresses),
satisfying the requirement for at least 50 hosts. A /27 supports only 30 hosts, a /28
supports 14 hosts, and a /30 supports only 2 usable addresses.
Q4. Which OSI layer is responsible for end-to-end communication, segmentation,
and reliability mechanisms?
A. Network Layer
B. Session Layer
C. Transport Layer
D. Data Link Layer
Correct Answer: 🔴 C. Transport Layer
Explanation: 🔹 The Transport Layer manages segmentation, flow control, error
recovery, and reliable delivery through protocols such as TCP. Network Layer
handles routing, while Data Link Layer manages local frame delivery.
Q5. An engineer captures traffic and observes MAC addresses but not IP addresses.
At which OSI layer is the captured information primarily operating?
A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 7
Correct Answer: 🔴 A. Layer 2
, Explanation: 🔹 MAC addresses are Data Link Layer identifiers. IP addresses belong
to Layer 3. Transport and Application layers operate higher in the OSI model and do
not directly use MAC addressing for communication decisions.
Q6. Which protocol is responsible for resolving an IPv4 address to a MAC address on
a local network?
A. DNS
B. ARP
C. DHCP
D. ICMP
Correct Answer: 🔴 B. ARP
Explanation: 🔹 Address Resolution Protocol (ARP) maps IPv4 addresses to MAC
addresses within a local broadcast domain. DNS resolves names, DHCP assigns
addresses, and ICMP handles diagnostic messaging.
Q7. A network administrator needs a protocol that provides connection-oriented
communication and guarantees delivery. Which protocol should be selected?
A. UDP
B. IP
C. TCP
D. ARP
Correct Answer: 🔴 C. TCP
Explanation: 🔹 TCP provides reliable, connection-oriented communication using
acknowledgments, sequencing, and retransmission. UDP prioritizes speed and low
overhead without delivery guarantees.
