CompTIA Network+ (N10-008) — Practice Exam NEWEST 2025-
2026 UPDATE 100 QUESTIONS & 100% CORRECT ANSWERS
GRADED A+ (BRAND NEW!!)
Most Tested Areas: Networking Fundamentals, OSI & TCP/IP
Models, IP Addressing & Subnetting, Routing & Switching,
Network Security, Wireless Standards, Troubleshooting,
Network Services, Infrastructure, Ports & Protocols
1. A network administrator needs to segment a
network to reduce broadcast traffic. Which device
should be used?
Switch
Explanation: Switches segment collision domains and, with VLANs, can also
reduce broadcast domains.
2. Which OSI layer is responsible for logical addressing
and routing?
Network layer
Explanation: The Network layer (Layer 3) handles IP addressing and routing
decisions.
3. What protocol is used to automatically assign IP
addresses to devices on a network?
DHCP
Explanation: Dynamic Host Configuration Protocol dynamically assigns IP
configuration.
,4. Which port number is used by HTTPS?
443
Explanation: HTTPS uses TCP port 443 for secure web communication.
5. A technician needs to translate a domain name into
an IP address. Which service is used?
DNS
Explanation: Domain Name System resolves hostnames to IP addresses.
6. Which topology uses a central device to connect all
nodes?
Star topology
Explanation: In a star topology, all devices connect to a central switch or
hub.
7. Which cable type is most resistant to
electromagnetic interference?
Fiber optic cable
Explanation: Fiber uses light instead of electricity, making it immune to EMI.
8. What does NAT primarily accomplish?
Translates private IP addresses to public IP addresses
Explanation: Network Address Translation enables multiple devices to share
one public IP.
9. Which protocol provides connectionless
communication?
UDP
, Explanation: User Datagram Protocol sends data without establishing a
session.
10. Which wireless standard operates exclusively in
the 5 GHz band?
802.11a
Explanation: 802.11a uses only 5 GHz frequencies.
11. What is the default subnet mask for a Class C
network?
255.255.255.0
Explanation: Class C networks use a /24 mask by default.
12. Which device operates at Layer 1 of the OSI
model?
Hub
Explanation: Hubs simply repeat electrical signals without filtering.
13. Which protocol is used to securely transfer files
over SSH?
SFTP
Explanation: SSH File Transfer Protocol uses SSH for encryption.
14. What is the purpose of VLANs?
Logically segment networks within a switch
Explanation: VLANs create separate broadcast domains on the same
physical switch.
15. Which address is used to uniquely identify a
network interface card?
2026 UPDATE 100 QUESTIONS & 100% CORRECT ANSWERS
GRADED A+ (BRAND NEW!!)
Most Tested Areas: Networking Fundamentals, OSI & TCP/IP
Models, IP Addressing & Subnetting, Routing & Switching,
Network Security, Wireless Standards, Troubleshooting,
Network Services, Infrastructure, Ports & Protocols
1. A network administrator needs to segment a
network to reduce broadcast traffic. Which device
should be used?
Switch
Explanation: Switches segment collision domains and, with VLANs, can also
reduce broadcast domains.
2. Which OSI layer is responsible for logical addressing
and routing?
Network layer
Explanation: The Network layer (Layer 3) handles IP addressing and routing
decisions.
3. What protocol is used to automatically assign IP
addresses to devices on a network?
DHCP
Explanation: Dynamic Host Configuration Protocol dynamically assigns IP
configuration.
,4. Which port number is used by HTTPS?
443
Explanation: HTTPS uses TCP port 443 for secure web communication.
5. A technician needs to translate a domain name into
an IP address. Which service is used?
DNS
Explanation: Domain Name System resolves hostnames to IP addresses.
6. Which topology uses a central device to connect all
nodes?
Star topology
Explanation: In a star topology, all devices connect to a central switch or
hub.
7. Which cable type is most resistant to
electromagnetic interference?
Fiber optic cable
Explanation: Fiber uses light instead of electricity, making it immune to EMI.
8. What does NAT primarily accomplish?
Translates private IP addresses to public IP addresses
Explanation: Network Address Translation enables multiple devices to share
one public IP.
9. Which protocol provides connectionless
communication?
UDP
, Explanation: User Datagram Protocol sends data without establishing a
session.
10. Which wireless standard operates exclusively in
the 5 GHz band?
802.11a
Explanation: 802.11a uses only 5 GHz frequencies.
11. What is the default subnet mask for a Class C
network?
255.255.255.0
Explanation: Class C networks use a /24 mask by default.
12. Which device operates at Layer 1 of the OSI
model?
Hub
Explanation: Hubs simply repeat electrical signals without filtering.
13. Which protocol is used to securely transfer files
over SSH?
SFTP
Explanation: SSH File Transfer Protocol uses SSH for encryption.
14. What is the purpose of VLANs?
Logically segment networks within a switch
Explanation: VLANs create separate broadcast domains on the same
physical switch.
15. Which address is used to uniquely identify a
network interface card?
