CompTIA Updated N10-009 Exam Questions and Answers by destiny

To access the internet using static IPs, the firewall (or router) must be configured correctly:

B. Default gateway: This is essential because it tells the firewall where to send outbound traffic destined for outside the local network.

D. One static IP address: The firewall must be assigned one of the static IPs to communicate over the public internet.

The other options are not essential for basic internet connectivity in this context:

A. NTP server: Useful for time synchronization but not required for internet access.

C. The modem’s IP address: Irrelevant unless doing modem-level configuration.

E. DNS servers: Important for name resolution but not for basic layer 3 connectivity.

F. DHCP server: Not used when static IPs are assigned.

????Reference:

CompTIA Network+ N10-009 Official Objectives: 2.2 – Compare and contrast addressing technologies.

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Comprehensive and Detailed Explanation:

IfAPs are changing channels frequently, it indicatesautomatic channel selectiondue tointerference. This can causetemporary disconnectionsas the APs switch frequencies.

Breakdown of Options:

A. Channel interference–✅Correct answer.APschange channels automaticallyto avoid interference,causing disconnections.

B. Roaming misconfiguration– Roamingonly affects moving users, but users reportissues while stationary.

C. Network congestion– Causesslow speeds,not frequent disconnects.

D. Insufficient wireless coverage– Wouldcause weak signals, butnot channel switching issues.

•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.

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.