1
CompTIA Network+ (N10-009)
Practice Exam v2.0 a well
detailed one written
and graded A+ upgraded
Advanced/Hard Multiple-Choice
Questions with Answers and
Rationales
, 2
Domain 1: Networking Concepts (23%)
Question 1
A network architect is designing a global enterprise network that requires any-to-any
connectivity between all branch offices without traversing a central hub. The solution must
support dynamic path selection based on real-time network conditions and provide automated
failover. Which of the following technologies BEST meets these requirements?
A. MPLS Layer 3 VPN with BGP
B. SD-WAN with application-aware routing
C. Site-to-site IPsec VPN with static routing
D. DMVPN with dynamic multipoint tunnels
-” detailed answer 100 % correct :-”B
Rationale: SD-WAN provides any-to-any connectivity, dynamic path selection based on real-time
conditions, and automated failover. MPLS with BGP requires provider involvement. Static
routing lacks dynamic path selection. DMVPN provides dynamic tunnels but less application-
aware routing compared to SD-WAN.
Question 2
A network administrator is implementing IPv6 in a dual-stack environment. The administrator
needs to configure a method for IPv6 hosts to automatically discover the IPv6 address of the
default gateway. Which of the following protocols provides this functionality?
A. DHCPv6
B. NDP (Neighbor Discovery Protocol)
C. ARP
D. DNS
-” detailed answer 100 % correct :-”B
Rationale: NDP (Neighbor Discovery Protocol) in IPv6 performs functions similar to ARP and
ICMP in IPv4, including router discovery (finding default gateways). DHCPv6 can assign
addresses but is not required for gateway discovery. ARP is IPv4 only. DNS resolves names to
addresses.
, 3
Question 3
A company is deploying a new application that requires low latency and high throughput
between servers in the same data center. The servers are in different racks and need to be
connected over a distance of 15 meters. Which of the following cabling solutions provides the
BEST performance for this scenario?
A. Category 6a UTP
B. Category 7 STP
C. OM4 multimode fiber
D. Direct Attach Copper (DAC) cable
-” detailed answer 100 % correct :-”D
Rationale: Direct Attach Copper (DAC) provides low latency and high throughput (up to 400
Gbps) over short distances (up to 15 meters) with lower cost and power than fiber. Category 6a
supports 10 Gbps over 100m. Category 7 supports 10 Gbps. OM4 fiber provides high speed but
higher latency than DAC for short distances.
Question 4
Which of the following IPv6 address types is equivalent to a private IPv4 address and is used for
local communication within an organization but is not routable on the public Internet?
A. Link-Local
B. Unique Local Address (ULA)
C. Global Unicast Address
D. Multicast Address
-” detailed answer 100 % correct :-”B
Rationale: Unique Local Addresses (FC00::/7) are equivalent to IPv4 private addresses
(RFC1918)—used within an organization and not routable on the Internet. Link-Local (FE80::/10)
is for single-link communication only. Global Unicast (2000::/3) is routable on the Internet.
Multicast (FF00::/8) is for group communication.
Question 5
A network engineer is configuring a router to support both IPv4 and IPv6 traffic. The router
must translate between IPv4 and IPv6 networks. Which of the following technologies should be
used?
, 4
A. 6to4
B. ISATAP
C. NAT64
D. Teredo
-” detailed answer 100 % correct :-”C
Rationale: NAT64 translates between IPv6 and IPv4 networks, allowing IPv6-only clients to
communicate with IPv4-only servers. 6to4 and ISATAP are tunneling mechanisms for IPv6 over
IPv4. Teredo is a tunneling protocol for IPv6 over UDP.
Question 6
A network technician is troubleshooting a connectivity issue and notices that packets are being
fragmented. The technician wants to determine the maximum packet size that can traverse the
path without fragmentation. Which of the following techniques should be used?
A. MTU path discovery
B. ICMP echo with DF bit set
C. Traceroute with packet size variation
D. Both A and B
-” detailed answer 100 % correct :-”D
Rationale: MTU path discovery uses ICMP echo requests with the DF (Don't Fragment) bit set to
determine the maximum MTU along a path. Both MTU path discovery and the DF bit technique
are used. Traceroute with packet size variation is a manual method but less efficient.
Question 7
Which of the following describes the function of the Presentation layer (Layer 6) of the OSI
model?
A. Routing packets between networks
B. Formatting, encrypting, and compressing data for the application
C. Establishing, managing, and terminating sessions
D. Providing end-to-end error recovery
-” detailed answer 100 % correct :-”B
Rationale: The Presentation layer (Layer 6) is responsible for data formatting, encryption, and
compression. Routing is Layer 3. Session management is Layer 5. Error recovery is Layer 4.
CompTIA Network+ (N10-009)
Practice Exam v2.0 a well
detailed one written
and graded A+ upgraded
Advanced/Hard Multiple-Choice
Questions with Answers and
Rationales
, 2
Domain 1: Networking Concepts (23%)
Question 1
A network architect is designing a global enterprise network that requires any-to-any
connectivity between all branch offices without traversing a central hub. The solution must
support dynamic path selection based on real-time network conditions and provide automated
failover. Which of the following technologies BEST meets these requirements?
A. MPLS Layer 3 VPN with BGP
B. SD-WAN with application-aware routing
C. Site-to-site IPsec VPN with static routing
D. DMVPN with dynamic multipoint tunnels
-” detailed answer 100 % correct :-”B
Rationale: SD-WAN provides any-to-any connectivity, dynamic path selection based on real-time
conditions, and automated failover. MPLS with BGP requires provider involvement. Static
routing lacks dynamic path selection. DMVPN provides dynamic tunnels but less application-
aware routing compared to SD-WAN.
Question 2
A network administrator is implementing IPv6 in a dual-stack environment. The administrator
needs to configure a method for IPv6 hosts to automatically discover the IPv6 address of the
default gateway. Which of the following protocols provides this functionality?
A. DHCPv6
B. NDP (Neighbor Discovery Protocol)
C. ARP
D. DNS
-” detailed answer 100 % correct :-”B
Rationale: NDP (Neighbor Discovery Protocol) in IPv6 performs functions similar to ARP and
ICMP in IPv4, including router discovery (finding default gateways). DHCPv6 can assign
addresses but is not required for gateway discovery. ARP is IPv4 only. DNS resolves names to
addresses.
, 3
Question 3
A company is deploying a new application that requires low latency and high throughput
between servers in the same data center. The servers are in different racks and need to be
connected over a distance of 15 meters. Which of the following cabling solutions provides the
BEST performance for this scenario?
A. Category 6a UTP
B. Category 7 STP
C. OM4 multimode fiber
D. Direct Attach Copper (DAC) cable
-” detailed answer 100 % correct :-”D
Rationale: Direct Attach Copper (DAC) provides low latency and high throughput (up to 400
Gbps) over short distances (up to 15 meters) with lower cost and power than fiber. Category 6a
supports 10 Gbps over 100m. Category 7 supports 10 Gbps. OM4 fiber provides high speed but
higher latency than DAC for short distances.
Question 4
Which of the following IPv6 address types is equivalent to a private IPv4 address and is used for
local communication within an organization but is not routable on the public Internet?
A. Link-Local
B. Unique Local Address (ULA)
C. Global Unicast Address
D. Multicast Address
-” detailed answer 100 % correct :-”B
Rationale: Unique Local Addresses (FC00::/7) are equivalent to IPv4 private addresses
(RFC1918)—used within an organization and not routable on the Internet. Link-Local (FE80::/10)
is for single-link communication only. Global Unicast (2000::/3) is routable on the Internet.
Multicast (FF00::/8) is for group communication.
Question 5
A network engineer is configuring a router to support both IPv4 and IPv6 traffic. The router
must translate between IPv4 and IPv6 networks. Which of the following technologies should be
used?
, 4
A. 6to4
B. ISATAP
C. NAT64
D. Teredo
-” detailed answer 100 % correct :-”C
Rationale: NAT64 translates between IPv6 and IPv4 networks, allowing IPv6-only clients to
communicate with IPv4-only servers. 6to4 and ISATAP are tunneling mechanisms for IPv6 over
IPv4. Teredo is a tunneling protocol for IPv6 over UDP.
Question 6
A network technician is troubleshooting a connectivity issue and notices that packets are being
fragmented. The technician wants to determine the maximum packet size that can traverse the
path without fragmentation. Which of the following techniques should be used?
A. MTU path discovery
B. ICMP echo with DF bit set
C. Traceroute with packet size variation
D. Both A and B
-” detailed answer 100 % correct :-”D
Rationale: MTU path discovery uses ICMP echo requests with the DF (Don't Fragment) bit set to
determine the maximum MTU along a path. Both MTU path discovery and the DF bit technique
are used. Traceroute with packet size variation is a manual method but less efficient.
Question 7
Which of the following describes the function of the Presentation layer (Layer 6) of the OSI
model?
A. Routing packets between networks
B. Formatting, encrypting, and compressing data for the application
C. Establishing, managing, and terminating sessions
D. Providing end-to-end error recovery
-” detailed answer 100 % correct :-”B
Rationale: The Presentation layer (Layer 6) is responsible for data formatting, encryption, and
compression. Routing is Layer 3. Session management is Layer 5. Error recovery is Layer 4.
