COMPTIA NETWORK+ N10-008
CERTIFICATION EXAM WITH QUESTIONS
AND VERIFIED ANSWERS, PLUS DETAILED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. Which OSI model layer is responsible for logical addressing and
routing packets between different networks?
A. Data Link
B. Network
C. Transport
D. Session
Answer: B. Network
Rationale: The Network layer (Layer 3) is responsible for logical
addressing, primarily through IP addresses, and determining the best
path for packets between networks. Routers operate primarily at this
layer. The Data Link layer handles MAC addressing and local-frame
delivery, while the Transport layer provides end-to-end delivery and
port addressing.
2. A network administrator needs to connect two switches using a
link that will carry traffic from VLANs 10, 20, and 30
simultaneously. Which configuration is most appropriate?
A. Access port
B. Trunk port
C. Loopback interface
D. Routed port
Answer: B. Trunk port
1
,Rationale: A trunk port carries traffic for multiple VLANs across a
single physical connection, commonly using IEEE 802.1Q VLAN
tagging. An access port normally belongs to a single VLAN and is
typically used for end devices.
3. A workstation has an IP address of 192.168.10.75/24. Which
subnet contains this host?
A. 192.168.0.0/24
B. 192.168.10.0/24
C. 192.168.10.64/26
D. 192.168.75.0/24
Answer: B. 192.168.10.0/24
Rationale: A /24 subnet uses 255.255.255.0 as its subnet mask.
Therefore, the first three octets identify the network portion, making
192.168.10.0 the network address. The valid host range is 192.168.10.1
through 192.168.10.254, with .255 reserved as the broadcast address.
4. Which protocol automatically assigns IP addresses, subnet masks,
default gateways, and DNS server information to clients?
A. DNS
B. DHCP
C. ARP
D. SNMP
Answer: B. DHCP
Rationale: Dynamic Host Configuration Protocol automatically
provides network configuration parameters to clients. A typical DHCP
exchange involves Discover, Offer, Request, and Acknowledgment
2
,messages, commonly summarized as DORA. DNS resolves names to
IP addresses, while ARP maps IPv4 addresses to MAC addresses.
5. A user can access websites by IP address but cannot access them
using domain names. Which service should the administrator
investigate first?
A. DHCP
B. DNS
C. NTP
D. SNMP
Answer: B. DNS
Rationale: DNS translates human-readable domain names such as
example.com into IP addresses. If connectivity by IP works but name-
based access fails, DNS resolution is a primary suspect.
6. Which IPv4 address is a private address?
A. 8.8.8.8
B. 172.32.10.5
C. 192.168.25.10
D. 11.0.0.10
Answer: C. 192.168.25.10
Rationale: IPv4 private address ranges include 10.0.0.0/8,
172.16.0.0/12, and 192.168.0.0/16. The address 192.168.25.10 falls
within the third range. Private addresses are commonly used inside
LANs and are normally translated through NAT when accessing the
public Internet.
3
, 7. Which IPv6 address type is equivalent in concept to an IPv4
private address?
A. Global unicast
B. Link-local
C. Unique local
D. Multicast
Answer: C. Unique local
Rationale: IPv6 Unique Local Addresses, generally within FC00::/7,
are designed for private internal addressing. Link-local addresses,
normally beginning with FE80::/10, are used for communication on
the local link and are not routed across networks.
8. Which device primarily forwards traffic based on MAC
addresses?
A. Router
B. Layer 3 firewall
C. Switch
D. DNS server
Answer: C. Switch
Rationale: A traditional Layer 2 switch examines destination MAC
addresses and uses its MAC address table to determine the appropriate
outgoing port. Routers primarily make forwarding decisions using
Layer 3 IP addressing.
9. What is the primary purpose of ARP in an IPv4 Ethernet
network?
A. Resolve domain names
B. Map an IPv4 address to a MAC address
4
CERTIFICATION EXAM WITH QUESTIONS
AND VERIFIED ANSWERS, PLUS DETAILED
RATIONALES/EXPERT VERIFIED FOR
GUARANTEED PASS 2026/LATEST
UPDATE/INSTANT DOWNLOAD PDF
1. Which OSI model layer is responsible for logical addressing and
routing packets between different networks?
A. Data Link
B. Network
C. Transport
D. Session
Answer: B. Network
Rationale: The Network layer (Layer 3) is responsible for logical
addressing, primarily through IP addresses, and determining the best
path for packets between networks. Routers operate primarily at this
layer. The Data Link layer handles MAC addressing and local-frame
delivery, while the Transport layer provides end-to-end delivery and
port addressing.
2. A network administrator needs to connect two switches using a
link that will carry traffic from VLANs 10, 20, and 30
simultaneously. Which configuration is most appropriate?
A. Access port
B. Trunk port
C. Loopback interface
D. Routed port
Answer: B. Trunk port
1
,Rationale: A trunk port carries traffic for multiple VLANs across a
single physical connection, commonly using IEEE 802.1Q VLAN
tagging. An access port normally belongs to a single VLAN and is
typically used for end devices.
3. A workstation has an IP address of 192.168.10.75/24. Which
subnet contains this host?
A. 192.168.0.0/24
B. 192.168.10.0/24
C. 192.168.10.64/26
D. 192.168.75.0/24
Answer: B. 192.168.10.0/24
Rationale: A /24 subnet uses 255.255.255.0 as its subnet mask.
Therefore, the first three octets identify the network portion, making
192.168.10.0 the network address. The valid host range is 192.168.10.1
through 192.168.10.254, with .255 reserved as the broadcast address.
4. Which protocol automatically assigns IP addresses, subnet masks,
default gateways, and DNS server information to clients?
A. DNS
B. DHCP
C. ARP
D. SNMP
Answer: B. DHCP
Rationale: Dynamic Host Configuration Protocol automatically
provides network configuration parameters to clients. A typical DHCP
exchange involves Discover, Offer, Request, and Acknowledgment
2
,messages, commonly summarized as DORA. DNS resolves names to
IP addresses, while ARP maps IPv4 addresses to MAC addresses.
5. A user can access websites by IP address but cannot access them
using domain names. Which service should the administrator
investigate first?
A. DHCP
B. DNS
C. NTP
D. SNMP
Answer: B. DNS
Rationale: DNS translates human-readable domain names such as
example.com into IP addresses. If connectivity by IP works but name-
based access fails, DNS resolution is a primary suspect.
6. Which IPv4 address is a private address?
A. 8.8.8.8
B. 172.32.10.5
C. 192.168.25.10
D. 11.0.0.10
Answer: C. 192.168.25.10
Rationale: IPv4 private address ranges include 10.0.0.0/8,
172.16.0.0/12, and 192.168.0.0/16. The address 192.168.25.10 falls
within the third range. Private addresses are commonly used inside
LANs and are normally translated through NAT when accessing the
public Internet.
3
, 7. Which IPv6 address type is equivalent in concept to an IPv4
private address?
A. Global unicast
B. Link-local
C. Unique local
D. Multicast
Answer: C. Unique local
Rationale: IPv6 Unique Local Addresses, generally within FC00::/7,
are designed for private internal addressing. Link-local addresses,
normally beginning with FE80::/10, are used for communication on
the local link and are not routed across networks.
8. Which device primarily forwards traffic based on MAC
addresses?
A. Router
B. Layer 3 firewall
C. Switch
D. DNS server
Answer: C. Switch
Rationale: A traditional Layer 2 switch examines destination MAC
addresses and uses its MAC address table to determine the appropriate
outgoing port. Routers primarily make forwarding decisions using
Layer 3 IP addressing.
9. What is the primary purpose of ARP in an IPv4 Ethernet
network?
A. Resolve domain names
B. Map an IPv4 address to a MAC address
4
