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

The maximum recommended length for Ethernet cable runs is 100 meters (328 feet). At 150 meters, the Cat 6 cable is too long, causing signal degradation and connectivity issues. Running fiber from the distribution switch to an access switch in the annex will allow for reliable connectivity over longer distances, as fiber can cover greater distances without signal loss. (Reference: CompTIA Network+ Study Guide, Chapter on Network Cable Standards)

Bottlenecking occurs when a device in the network (such as an IPS) cannot process traffic efficiently, resulting in a dramatic drop in throughput. The significant difference between the firewall's speed (48.8 Mbps down) and the end-user devices’ speeds (4.8 - 5.2 Mbps down) indicates a bottleneck caused by the IPS.

•Why not the other options?

•Packet loss (A) – Would typically cause connection timeouts, not just slow speeds.

•Channel overlap (C) – Affects only wireless networks, but the wired desktop is also experiencing slow speeds.

•Network congestion (D) – Would show fluctuations in both upload and download speeds, but upload speeds remain unaffected.

•The issue described is a network bottleneck due to increased traffic after a merger.

•A collapsed core architecture consolidates the core and distribution layers into a single layer to improve efficiency and reduce latency.

•Until the 40GB switch is acquired, Link Aggregation (LAG) (IEEE 802.3ad / LACP) can be used to combine multiple physical links into a single logical link, increasing bandwidth and reducing bottlenecks.

•FHRP (First Hop Redundancy Protocol) (A) is used for gateway redundancy, not link aggregation.

•Route selection metric changes (B) help with routing decisions but don’t address physical link congestion.

•Load balancers (C) distribute traffic for applications, not network links.

????Reference: CompTIA Network+ N10-009 Official Documentation – Network Architecture and Performance Optimization.

The 802.11n standard supports MIMO (Multiple Input Multiple Output), which allows multiple antennas to increase data throughput and improve reliability. Additionally, it uses non-overlapping channels in the 5 GHz band (and optionally the 2.4 GHz band), making it a good choice for high-speed, interference-resistant wireless connections. (Reference: CompTIA Network+ Study Guide, Chapter on Wireless Technologies)

Comprehensive and Detailed Explanation:

Thenetstatoutput shows thatmultiple ports are open, includingTelnet (23), FTP (20), and TFTP (69), which are potential security risks.Disabling unused portsminimizes the attack surface, reducing security vulnerabilities.

Breakdown of Options:

A. Disable the unused ports–Correct answer.Unused portsshould be closedto prevent unauthorized access.

B. Enforce access control lists– ACLs help control access but donot disable unnecessary services.

C. Perform content filtering– Content filtering controlsweb traffic,not port security.

D. Set up a screened subnet– ADMZ (screened subnet)improves security but doesnot address open ports.

The issue is clearly related toDNS resolution, as IP-based connections succeed but domain name-based ones fail.

D. dig(Domain Information Groper) is a DNS lookup tool used to troubleshoot DNS problems by querying name servers directly.

Other tools are less relevant here:

A. tcpdumpis a packet analyzer and is more advanced for deeper traffic analysis.

B. tracertis used to trace the route to a destination, not ideal for DNS issues.

C. nmapis a port scanner and network mapper, not for resolving DNS problems.

????Reference:

CompTIA Network+ N10-009 Official Objectives: 5.1 – Given a scenario, use the appropriate network troubleshooting tools.

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Comprehensive and Detailed Explanation:

Aload balanceris designed todistribute user requestsacross multiple servers toensure high availability and performance.

Breakdown of Options:

A. Router– Directs trafficbetween networks,not between web servers.

B. Switch– Works atLayer 2, doesnot distribute web traffic.

C. Firewall– Secures network traffic, butdoes not distribute load.

D. Load balancer–✅Correct answer.Optimizes web traffic distributionacross multiple servers.

Comprehensive and Detailed Explanation:

BNC connectorsare commonly used forcoaxial cables, including those connecting toexternal antennasinWi-Fi, radio, and surveillance systems.

Breakdown of Options:

A. BNC–Correct answer.Used forcoaxial cablesinwireless and antenna connections.

B. ST– Used forfiber optic cables,not antennas.

C. LC– Afiber optic connector,not for antennas.

D. MPO– Used formulti-fiber optic cables,not RF antennas.

Infrastructure as a Service (IaaS) provides scalable compute power, storage, and networking resources on demand. It is the best choice for a company that needs to customize its cloud solution based on size, compute capacity, and storage needs.

IaaS Benefits:

Provides virtual machines, storage, and networking resources.

Scalable based on company needs.

Reduces the need for physical infrastructure.

Incorrect Options:

A. SaaS (Software as a Service): Delivers software applications (e.g., Google Docs, Microsoft 365) but does not provide compute/storage infrastructure.

B. PaaS (Platform as a Service): Provides a development environment for application deployment but not full infrastructure control.

D. IaC (Infrastructure as Code): A methodology for automating infrastructure, not a cloud deployment model.