CompTIA Updated N10-009 Exam Questions and Answers by ruby-rose

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

SSH provides secure, scriptable remote access used by automation/orchestration tools (e.g., leveraging CLI, NETCONF over SSH, or Ansible modules) to push configurations at scale.

A. RDP is primarily for Windows GUI sessions and is not commonly used for network device automation.

B. Telnet can be scripted but is insecure (plaintext); modern best practice is to use SSH.

D. GUI access is typically manual and not ideal for scalable, repeatable automation.

References (CompTIA Network+ N10-009):

Domain: Network Operations — Configuration management, automation/orchestration, secure management protocols (SSH vs. Telnet), change at scale.

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Recovery Point Objective (RPO) defines the maximum acceptable amount of data loss measured in time. If leadership states “no more than eight hours of data loss,” they are describing how far back the organization is willing to roll data after an outage or disaster—meaning backups, replication, snapshots, or journaling must ensure recoverable data is no older than eight hours. In Network+ terms, this is a core availability and resiliency planning concept: you choose an RPO based on business impact, then implement backup frequency/replication strategy to meet it. By contrast, Recovery Time Objective (RTO) is about how quickly services must be restored (downtime duration), not how much data can be lost. MTTR (Mean Time to Repair/Recover) is an operational reliability metric describing typical time to restore a system, and MTBF (Mean Time Between Failures) indicates expected time between failures—neither directly states acceptable data loss. Therefore, the metric matching “eight hours of data loss” is RPO.

Security groups in cloud environments act as virtual firewalls for VM instances, controlling inbound and outbound traffic based on specified rules.

From Andrew Ramdayal’s guide:

“Network security groups are used to control inbound and outbound traffic to cloud resources within a VPC. They act as a virtual firewall for associated instances...”

The correct answer is C. Address pool exhaustion. The laptop has assigned itself an address in the 169.254.x.x range, which is an APIPA address. That happens when the device is configured to use DHCP but cannot successfully obtain an address lease from a DHCP server. The missing default gateway and DHCP server entries support that conclusion.

Among the choices, the most likely reason is that the DHCP scope has run out of available addresses. When the pool is exhausted, new clients cannot receive a valid IP configuration and fall back to an automatic private address. As a result, the laptop will not be able to reach internal company resources like the intranet because it is not properly configured for the network.

The other answers do not fit the evidence. A short DHCP lease duration may cause more frequent renewals, but it does not directly explain the self-assigned APIPA address. An IIS server malfunction would affect the web service itself, not the client’s local IP configuration. An IDS misconfiguration also would not normally result in a 169.254 address on the host.

The output clearly indicates a DHCP assignment failure, and from the options provided, address pool exhaustion is the best match.