COMPTIA NETWORK+ EXAM LATEST 2026 UPDATE
100 QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
Question 1
Which OSI layer is responsible for logical addressing and routing?
A. Data Link
B. Transport
C. Network
D. Session
Rationale: The Network layer (Layer 3) handles logical addressing such as IP
addresses and determines the best path for data routing.
Question 2
Which protocol is used to automatically assign IP addresses to devices on a
network?
A. DNS
B. SNMP
C. FTP
D. DHCP
Rationale: DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP
addresses and other network configuration parameters to devices.
Question 3
Which port number is used by HTTPS?
,A. 21
B. 80
C. 443
D. 3389
Rationale: HTTPS uses TCP port 443 to provide secure web communication via
SSL/TLS.
Question 4
What type of cable is used to connect two similar network devices directly
without a switch?
A. Rollover
B. Crossover
C. Straight-through
D. Fiber
Rationale: A crossover cable swaps transmit and receive pairs, allowing direct
communication between similar devices.
Question 5
Which wireless standard operates exclusively in the 5 GHz band?
A. 802.11b
B. 802.11a
C. 802.11g
D. 802.11n
Rationale: IEEE 802.11a operates only in the 5 GHz frequency band, unlike others
that may support 2.4 GHz.
Question 6
,Which command is used to test connectivity between two network hosts?
A. tracert
B. ipconfig
C. ping
D. nslookup
Rationale: The ping command uses ICMP Echo Requests and Replies to verify
connectivity between hosts.
Question 7
Which device operates at Layer 2 of the OSI model and forwards frames based on
MAC addresses?
A. Router
B. Switch
C. Hub
D. Firewall
Rationale: A switch operates at the Data Link layer and uses MAC addresses to
forward frames efficiently.
Question 8
Which topology uses a single central connection point for all devices?
A. Mesh
B. Bus
C. Ring
D. Star
Rationale: In a star topology, all devices connect to a central device such as a
switch or hub.
, Question 9
Which IPv4 address class provides the largest number of host addresses?
A. Class A
B. Class B
C. Class C
D. Class A
Rationale: Class A networks provide the largest number of hosts due to their 8-bit
network prefix.
Question 10
Which protocol translates domain names into IP addresses?
A. DHCP
B. DNS
C. ARP
D. SMTP
Rationale: DNS resolves human-readable domain names into IP addresses required
for network communication.
Question 11
What is the purpose of a VLAN?
A. Increase wireless coverage
B. Provide encryption
C. Segment a network logically
D. Assign IP addresses
Rationale: VLANs logically segment networks, improving security and reducing
broadcast domains.
100 QUESTIONS AND DETAILED VERIFIED ANSWERS
FROM ACTUAL EXAMS TEST GRADE A+
Question 1
Which OSI layer is responsible for logical addressing and routing?
A. Data Link
B. Transport
C. Network
D. Session
Rationale: The Network layer (Layer 3) handles logical addressing such as IP
addresses and determines the best path for data routing.
Question 2
Which protocol is used to automatically assign IP addresses to devices on a
network?
A. DNS
B. SNMP
C. FTP
D. DHCP
Rationale: DHCP (Dynamic Host Configuration Protocol) dynamically assigns IP
addresses and other network configuration parameters to devices.
Question 3
Which port number is used by HTTPS?
,A. 21
B. 80
C. 443
D. 3389
Rationale: HTTPS uses TCP port 443 to provide secure web communication via
SSL/TLS.
Question 4
What type of cable is used to connect two similar network devices directly
without a switch?
A. Rollover
B. Crossover
C. Straight-through
D. Fiber
Rationale: A crossover cable swaps transmit and receive pairs, allowing direct
communication between similar devices.
Question 5
Which wireless standard operates exclusively in the 5 GHz band?
A. 802.11b
B. 802.11a
C. 802.11g
D. 802.11n
Rationale: IEEE 802.11a operates only in the 5 GHz frequency band, unlike others
that may support 2.4 GHz.
Question 6
,Which command is used to test connectivity between two network hosts?
A. tracert
B. ipconfig
C. ping
D. nslookup
Rationale: The ping command uses ICMP Echo Requests and Replies to verify
connectivity between hosts.
Question 7
Which device operates at Layer 2 of the OSI model and forwards frames based on
MAC addresses?
A. Router
B. Switch
C. Hub
D. Firewall
Rationale: A switch operates at the Data Link layer and uses MAC addresses to
forward frames efficiently.
Question 8
Which topology uses a single central connection point for all devices?
A. Mesh
B. Bus
C. Ring
D. Star
Rationale: In a star topology, all devices connect to a central device such as a
switch or hub.
, Question 9
Which IPv4 address class provides the largest number of host addresses?
A. Class A
B. Class B
C. Class C
D. Class A
Rationale: Class A networks provide the largest number of hosts due to their 8-bit
network prefix.
Question 10
Which protocol translates domain names into IP addresses?
A. DHCP
B. DNS
C. ARP
D. SMTP
Rationale: DNS resolves human-readable domain names into IP addresses required
for network communication.
Question 11
What is the purpose of a VLAN?
A. Increase wireless coverage
B. Provide encryption
C. Segment a network logically
D. Assign IP addresses
Rationale: VLANs logically segment networks, improving security and reducing
broadcast domains.
