CompTIA Network+ Practice Exam (N10-008 Level)
NEWEST 2025-2026 UPDATE REAL PRACTICE EXAM
QUESTIONS & CORRECT ANSWERS | ALREADY
GRADED A+
Content covered (most tested domains): Networking
fundamentals, OSI & TCP/IP models, IP addressing &
subnetting, routing & switching, wireless standards, network
security, ports & protocols, network devices, virtualization &
cloud, troubleshooting, monitoring tools, high availability,
cabling & infrastructure
1. A network technician needs to determine which OSI layer is
responsible for logical addressing. Which layer performs this
function?
A. Data Link
B. Transport
C. Network
D. Physical
The Network layer (Layer 3) handles logical addressing such as IP
addresses and routing.
2. Which protocol uses port 443 by default?
A. HTTP
B. FTP
C. SMTP
D. HTTPS
HTTPS uses TCP port 443 for secure web communications.
,3. Which device separates broadcast domains in a network?
A. Hub
B. Switch
C. Access point
D. Router
Routers isolate broadcast domains by routing traffic between
networks.
4. What type of IPv6 address is equivalent to a public IPv4 address?
A. Link-local
B. Multicast
C. Unique local
D. Global unicast
Global unicast IPv6 addresses are publicly routable on the internet.
5. Which wireless standard operates only in the 5 GHz band and
supports high throughput?
A. 802.11b
B. 802.11g
C. 802.11ac
D. 802.11a
802.11ac uses only 5 GHz and supports gigabit speeds.
6. Which topology uses a single central cable to which all devices
connect?
A. Star
B. Mesh
C. Ring
D. Bus
A bus topology uses one backbone cable shared by all devices.
, 7. What is the default subnet mask for a Class C IPv4 address?
A. 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
D. 255.255.255.255
Class C networks use a /24 mask.
8. Which protocol is connectionless?
A. TCP
B. UDP
C. FTP
D. SSH
UDP does not establish sessions before transmitting data.
9. Which tool is best for testing reachability between two hosts?
A. Tracert
B. Netstat
C. Ipconfig
D. Ping
Ping uses ICMP echo requests to verify connectivity.
10. Which layer of the OSI model ensures reliable delivery
through acknowledgments?
A. Session
B. Network
C. Transport
D. Data Link
Transport layer protocols like TCP provide reliability.
11. What does NAT primarily accomplish?
A. Encrypts traffic
NEWEST 2025-2026 UPDATE REAL PRACTICE EXAM
QUESTIONS & CORRECT ANSWERS | ALREADY
GRADED A+
Content covered (most tested domains): Networking
fundamentals, OSI & TCP/IP models, IP addressing &
subnetting, routing & switching, wireless standards, network
security, ports & protocols, network devices, virtualization &
cloud, troubleshooting, monitoring tools, high availability,
cabling & infrastructure
1. A network technician needs to determine which OSI layer is
responsible for logical addressing. Which layer performs this
function?
A. Data Link
B. Transport
C. Network
D. Physical
The Network layer (Layer 3) handles logical addressing such as IP
addresses and routing.
2. Which protocol uses port 443 by default?
A. HTTP
B. FTP
C. SMTP
D. HTTPS
HTTPS uses TCP port 443 for secure web communications.
,3. Which device separates broadcast domains in a network?
A. Hub
B. Switch
C. Access point
D. Router
Routers isolate broadcast domains by routing traffic between
networks.
4. What type of IPv6 address is equivalent to a public IPv4 address?
A. Link-local
B. Multicast
C. Unique local
D. Global unicast
Global unicast IPv6 addresses are publicly routable on the internet.
5. Which wireless standard operates only in the 5 GHz band and
supports high throughput?
A. 802.11b
B. 802.11g
C. 802.11ac
D. 802.11a
802.11ac uses only 5 GHz and supports gigabit speeds.
6. Which topology uses a single central cable to which all devices
connect?
A. Star
B. Mesh
C. Ring
D. Bus
A bus topology uses one backbone cable shared by all devices.
, 7. What is the default subnet mask for a Class C IPv4 address?
A. 255.0.0.0
B. 255.255.0.0
C. 255.255.255.0
D. 255.255.255.255
Class C networks use a /24 mask.
8. Which protocol is connectionless?
A. TCP
B. UDP
C. FTP
D. SSH
UDP does not establish sessions before transmitting data.
9. Which tool is best for testing reachability between two hosts?
A. Tracert
B. Netstat
C. Ipconfig
D. Ping
Ping uses ICMP echo requests to verify connectivity.
10. Which layer of the OSI model ensures reliable delivery
through acknowledgments?
A. Session
B. Network
C. Transport
D. Data Link
Transport layer protocols like TCP provide reliability.
11. What does NAT primarily accomplish?
A. Encrypts traffic
