CompTIA Network+ N10-009 Passing Score

A hot site is a fully operational backup facility with hardware, network, and data synchronization already in place. It allows for immediate failover in the event of a disaster, minimizing downtime.

B. DCI (Data Center Interconnect) connects data centers but doesn’t guarantee availability unless built redundantly.

C. Direct Connect refers to a private link to cloud providers, not disaster recovery.

D. Active-passive can help with failover but may involve delay unless combined with hot site principles.

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CompTIA Network+ N10-009 Official Objectives: 4.4 – Summarize business continuity and disaster recovery concepts.

Since the switch supports only 10Gbps per port, achieving 40Gbps throughput requires link aggregation (LACP), which combines multiple 10Gbps links into one logical interface for higher bandwidth.

Breakdown of Options:

A. 802.1Q tagging – VLAN tagging helps segment traffic but does not increase throughput.

B. Jumbo frames – Jumbo frames reduce overhead but do not increase bandwidth.

C. Half duplex – Half duplex restricts communication, reducing performance instead of improving it.

D. Link aggregation – Correct answer. LACP combines multiple 10Gbps links to provide a 40Gbps connection.

Quality of Service (QoS) is used to prioritize certain types of traffic to ensure critical applications receive the bandwidth, low latency, and low jitter they need—especially during congestion. Network+ objectives cover QoS concepts such as classification, marking, queuing, and policing/shaping to manage how traffic is handled on interfaces and across links. If the requirement is to prioritize “classified services and applications,” QoS policies can match traffic using ports, protocols, DSCP markings, VLAN tags, or application identifiers and then place that traffic into higher-priority queues or reserve bandwidth for it. Load balancing distributes traffic across multiple servers/paths but does not inherently prioritize one class of traffic over another on congested links. TTL (time to live) is an IP header field used to prevent routing loops and is unrelated to prioritization. A CDN improves content delivery and caching for distributed users, but it is not a traffic-prioritization mechanism within an organization’s network. Therefore, QoS is the correct technology for prioritizing specific services and applications.

Ping sends ICMP Echo Request packets and waits for Echo Replies to verify host reachability and measure round-trip time.

A. tcpdump captures packets but does not test reachability.

B. netstat displays open ports and network sessions.

C. nslookup queries DNS servers for name resolution.

References (CompTIA Network+ N10-009):

Domain: Networking Concepts — ICMP operation, troubleshooting tools.