N10-009 Exam Dumps - CompTIA Network+ Questions and Answers

A = 192.168.10.0/26

B = 192.168.1.0/23

C = 10.0.0.1/18

Using the choices shown in the screenshot, the best-fit subnet selections are based on host growth requirements first, then segmentation .

For Company A , the current device count is 32 . With 20% growth , that becomes about 39 devices . A /27 only supports 30 usable hosts , so it is too small. A /26 supports 62 usable hosts , so 192.168.10.0/26 is the correct choice.

For Company B , the current device count is 100 . With 20% growth , that becomes 120 devices . The smallest correct subnet would normally be a /25 with 126 usable hosts , but that option is not shown. From the available choices, 192.168.1.0/23 is the smallest subnet that still supports more than 120 hosts, so that is the best answer.

For Company C , the current device count is 10,000 . With 20% growth , it needs space for 12,000 hosts . A /18 provides 16,382 usable hosts , while a /19 is not available and a /21 or /22 would be far too small. Therefore, 10.0.0.1/18 is the correct selection.

One important note: the dropdown choices shown do not actually let all three companies be placed into a single true Class B network block. So these answers are the best valid selections from the provided options .

If the company’s SSID is not visible in some areas while other networks are still visible, the most likely cause is insufficient wireless coverage. The wireless signal does not reach those areas, meaning additional access points or signal boosters may be required.

Breakdown of Options:

A. Interference or channel overlap – Would cause slow or unstable connections, but the SSID should still be visible.

B. Insufficient wireless coverage – ✅ Correct answer. If the SSID is not appearing, the signal is too weak in that area.

C. Roaming misconfiguration – Would cause devices to stay on weaker APs instead of switching, but the SSID should still be visible.

D. Client disassociation issues – This would disconnect users, but they should still see the network.

Comprehensive and Detailed Explanation (aligned to N10-009):

Multimode fiber uses multiple paths (modes) of light that bounce off the cladding to travel through the fiber. This is effective for shorter distances but more prone to dispersion.

A. Twinaxial is copper, not fiber.

B. Coaxial carries electrical signals, not light.

C. Single-mode fiber uses a single light path directly through the core without bouncing.

References (CompTIA Network+ N10-009):

Domain: Networking Concepts — Fiber optics: single-mode vs. multimode.

When a user connects to a VPN and experiences connectivity issues to an external server, the problem is often related to routing or network path issues.

E. tracert:

Traces the path packets take from the user ' s device to the destination server.

Helps determine if the traffic is being blocked or misrouted.

F. route print:

Displays the device ' s routing table.

Helps diagnose whether traffic is being sent to the VPN tunnel instead of the correct external server.

Incorrect Options:

A. nslookup: Used for resolving domain names to IPs (DNS troubleshooting), but this issue is likely routing-related.

B. tcpdump: Captures packets for deep packet analysis, not typically the first step in diagnosing a VPN-related access issue.

C. arp: Used for resolving local network MAC addresses, not relevant for external VPN issues.

D. dig: Like nslookup, used for DNS queries, but not useful for routing problems.

Dynamic routing is most beneficial in a growing/changing network because it can automatically learn, adapt, and update routes as the topology changes. In Network+ (N10-009) routing objectives, dynamic routing protocols exchange routing information between routers and recalculate paths when links go down, new networks are added, or metrics change. This reduces the operational burden and the risk of human error that increases as the environment scales. With dynamic routing, adding a new subnet or branch often requires far fewer manual updates because routers propagate new route information automatically, and convergence mechanisms help restore connectivity after failures.

Option A can be partly true in large environments, but the core “best reason” emphasized for dynamic routing is the automatic adaptation to topology changes. Option B is incorrect—dynamic routing may introduce additional security considerations (route filtering, authentication, neighbor control). Option C is not a defining advantage; monitoring visibility depends on tools/telemetry rather than routing type. Therefore, the strongest and most correct reason is automatic changes and updates in network topology.

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Comprehensive and Detailed Explanation (aligned to N10-009):

A warm site is partially configured with necessary infrastructure and systems, but it requires recent backups to be restored before becoming fully operational. This provides a balance between cost and recovery time.

A. Cold site has only power and space, requiring full setup, which takes too long.

C. Active (active-active) runs simultaneously with the primary site, not only during failure.

D. Hot site is fully operational at all times and can take over immediately, but it’s more expensive.

References (CompTIA Network+ N10-009):

Domain: Network Infrastructure — Disaster recovery sites (cold, warm, hot, active).

Increasing the MTU (Maximum Transmission Unit) size allows larger frames to be transmitted, reducing overhead and improving throughput — especially for large file transfers like backups.

A. QoS prioritizes traffic but doesn’t reduce backup times directly.

B. SDN is a network management model, not a parameter change.

D. VXLAN encapsulates VLANs, not relevant to backup speeds.

E. TTL is for packet lifetime, not throughput.

References (CompTIA Network+ N10-009):

Domain: Network Infrastructure — MTU, jumbo frames, performance tuning.

RPO (Recovery Point Objective) describes a data recovery goal by defining the maximum acceptable amount of data loss measured in time. For example, an RPO of 4 hours means the organization must be able to restore data to a point no more than four hours before the outage—so backups, replication, or snapshots must occur frequently enough to meet that target. In Network+ (N10-009) operations objectives, disaster recovery and business continuity concepts include understanding recovery metrics and how they influence backup strategies, replication design, and service resilience planning. RPO specifically answers: “How much data can we afford to lose?”

By contrast, MTBF (Mean Time Between Failures) is a reliability metric describing how often failures occur. MTTR (Mean Time To Repair/Recover) measures how long it takes to restore a system after failure, which is more aligned with service restoration time rather than data loss. BCP (Business Continuity Plan) is the overall plan/process for keeping critical business functions running during disruptions; it is not a single data recovery metric. Therefore, RPO is the correct term for a data recovery goal.

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Configuration monitoring and management tools (often part of network management systems) maintain version-controlled records of device configurations, track changes, and log who made them. This provides accountability and supports compliance audits.

A. Network access control (NAC) manages endpoint access policies but does not track device config changes.

C. Zero Trust is a security framework requiring strict identity verification, not a configuration tracking tool.

D. Syslog collects system logs, but without a config monitoring system, it does not directly compare documentation to device state.

References (CompTIA Network+ N10-009):

Domain: Network Operations — Change management, configuration management, auditing.

The IPv4 address 192.168.123.232 falls within the Class C range under classful addressing. In classful terms, Class C addresses have a first octet from 192 to 223, which makes any address starting with 192.x.x.x a Class C address. Network+ (N10-009) networking concepts cover IPv4 addressing fundamentals and commonly reference class ranges as foundational knowledge, even though modern networks primarily use CIDR (classless) subnetting rather than strict classful boundaries.

This address is also within a well-known private IPv4 block: 192.168.0.0/16 (RFC1918 private addressing), which is frequently used for internal networks and NIC configurations where addresses are not routable on the public internet.

To eliminate the distractors: Class A uses first octet 1–126, Class B uses 128–191, and Class D (224–239) is reserved for multicast. Since the first octet here is 192, it maps to Class C, making option C correct.

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The loopback address 127.0.0.1 is used to test the TCP/IP stack of the local machine. Pinging this address confirms whether the local system ' s networking stack is functioning correctly.

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For a global streaming service, different countries and regions often have specific legal requirements about what content can be accessed (for example, age restrictions, prohibited material, censorship rules, or licensing constraints). To comply with these local laws at each regional point of presence (PoP), the company should implement content filtering. In Network+ security objectives, content filtering is a control used to allow, block, or restrict access to specific categories of content, URLs, applications, or media based on policy. Applied regionally, it supports geo-policy enforcement by ensuring that users served by a given PoP receive only content permitted in that jurisdiction.

An ACL primarily controls network traffic flows (permit/deny based on IPs, ports, and protocols). While ACLs can help block certain services, they are not designed to classify and regulate streaming media content in a way that aligns with legal content rules. Port security is a switch feature to restrict which devices can connect to a port (MAC-based controls) and is unrelated to regional compliance for streamed media. Key management concerns encryption key handling and protects confidentiality/integrity, but it does not determine which content is allowed in a region. Therefore, regional content filtering is the best match for meeting local legal requirements.

DHCP snooping is a security feature on network switches that helps to prevent unauthorized (rogue) DHCP servers from assigning IP addresses to clients. By implementing DHCP snooping, the network administrator can restrict DHCP responses to authorized servers only, preventing unauthorized DHCP configurations, such as incorrect DNS IPs, from being assigned to clients. This helps prevent man-in-the-middle attacks where malicious actors misconfigure DNS to redirect users to fraudulent sites. (Reference: CompTIA Network+ Study Guide, Chapter on Network Security)

The correct answer is Ad hoc because it allows wireless devices to communicate directly with one another without requiring a centralized access point or additional infrastructure. According to CompTIA Network+ (N10-009) objectives under wireless networking concepts, an ad hoc network (also known as an Independent Basic Service Set, or IBSS) enables peer-to-peer wireless communication.

This type of network is ideal for temporary or quick setups where only a small number of devices need to connect. In an ad hoc configuration, each device connects directly to others, making it simple and fast to deploy without requiring switches, routers, or wireless access points.

Spine and leaf (Option B) is a data center architecture designed for high scalability and redundancy, not small wireless setups. Point-to-point (Option C) refers to a direct connection between two devices only, which would not support five devices efficiently. Mesh (Option D) allows multiple nodes to interconnect and provide redundancy, but it is more complex and typically requires compatible infrastructure devices.

Therefore, for a quick setup with five wireless devices, an ad hoc network is the most appropriate choice.

The Network layer (Layer 3 of the OSI model) can utilize the connectionless protocol IP (Internet Protocol) to send data packets independently without establishing a connection. This approach is typical for protocols like IP, which provide best-effort delivery rather than guaranteed delivery. The document explains:

“The OSI Network Layer is responsible for logical addressing and routing, and it can utilize connectionless protocols like IP to send packets without requiring a session setup. This layer does not guarantee packet delivery, relying on higher layers for error detection or correction if needed.”