CompTIA N10-009 Dumps for the CompTIA Network+ Certification Exam 2026

A UPS (Uninterruptible Power Supply) provides backup power to devices during a power outage, allowing for continuous operation and protecting against sudden shutdowns that could cause data loss or equipment damage. The document confirms:

''A UPS (Uninterruptible Power Supply) is essential for maintaining power to critical devices during an outage, protecting data and ensuring continuous operation until power is restored or a safe shutdown can be performed.''

The correct answer is VLSM (Variable Length Subnet Masking). According to the CompTIA Network+ N10-009 objectives, VLSM allows a network administrator to create subnets of different sizes within the same network, making it ideal for environments where subnet host requirements vary.

In this scenario, the technician must support multiple subnet sizes---60 hosts, 15 hosts, and seven hosts---within a single Class C network. Using a single subnet mask for all eight subnets would either waste a large number of IP addresses or fail to meet host requirements. VLSM solves this problem by allowing each subnet to be assigned a custom subnet mask that closely matches its host needs, maximizing address efficiency.

CIDR enables classless addressing and route aggregation but does not, by itself, describe creating multiple subnet sizes within a single address block. APIPA is a self-assigned addressing mechanism used when DHCP fails and has no relevance to subnet design. RFC 1918 defines private IP address ranges but does not address subnetting strategies.

The Network+ objectives emphasize VLSM as a best practice for efficient IP address management, especially in enterprise environments where conserving address space and meeting diverse departmental requirements are critical. In this case, VLSM is the only solution capable of meeting all stated constraints.

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

A proxy server (specifically a caching HTTP/HTTPS proxy) stores frequently accessed web objects and serves them locally to clients, reducing external bandwidth consumption and improving response times.

B . Load balancer distributes traffic across servers but does not inherently cache internet content.

C . Open relay is a misconfigured mail server that permits unauthorized relaying---this is a security issue, not a caching solution.

D . Code repository (e.g., for source control) isn't related to web content caching.

Reference (CompTIA Network+ N10-009):

Domain: Network Standards, Protocols, and Implementations --- Application-layer services (HTTP/HTTPS), proxies and caching behavior, performance optimization.

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*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.

Spanning Tree Protocol (STP) is designed to detect and prevent Layer 2 loops by blocking redundant paths. If loops are possible in the design, enabling STP ensures network stability.

B . Port security controls endpoint MAC addresses, not loops.

C . Speed limits address bandwidth, not loop prevention.

D . 802.1Q tagging allows VLAN separation but does not resolve loops.

Reference (CompTIA Network+ N10-009):

Domain: Network Operations --- Loop prevention, spanning tree, switch design.