CompTIA Updated N10-009 Exam Questions and Answers by aras

When two devices on different subnets are unable to communicate, but can communicate with other devices on their own subnet, the issue is most often related to routing. Devices on different subnets require a default gateway to route traffic between networks.

If the default gateway is incorrectly configured, the device won’t know how to reach other subnets.

Faulty cables (Option B) or duplex mismatches (Option C) would likely cause connectivity issues even within the local subnet, which is not the case here.

VLAN mismatches (Option D) are typically issues with switch port configurations and would likely cause total loss of connectivity, including within the same subnet.

✅ So, the most probable and logical cause is an incorrect default gateway.

BYOD (Bring Your Own Device) policies define rules for using personal devices on the company network. Since the new employee is using a personal laptop, this policy applies.

Breakdown of Options:

A. IAM (Identity and Access Management) – Governs user permissions, not device policies.

B. BYOD (Bring Your Own Device) – ✅ Correct answer. Covers using personal devices for work.

C. DLP (Data Loss Prevention) – Focuses on preventing sensitive data leaks, not device usage policies.

D. AUP (Acceptable Use Policy) – Covers internet and system usage, but not personal device rules.

When a network administrator installs a new Network Interface Card (NIC) and users are unable to reach the server, one of the common issues is the use of an incorrect cable type. Network cables must match the specifications required by the NIC and the network infrastructure (e.g., Cat5e, Cat6 for Ethernet).

NIC Compatibility: The new NIC might require a specific type of cable to function properly. Using a cable not rated for the NIC's required speeds or capabilities can result in connectivity issues.

Cable Standards: Different NICs and network devices might need different cabling standards (straight-through vs. crossover cables, or specific fiber optic types).

Connection Types: Ensuring that the cable connectors are appropriate for the NIC ports (e.g., RJ45 for Ethernet, LC connectors for fiber optics).

Network References:

CompTIA Network+ N10-007 Official Certification Guide: Discusses network cabling standards and NIC specifications.

Cisco Networking Academy: Provides insights into cabling and NIC configurations for optimal network performance.

Network+ Certification All-in-One Exam Guide: Offers comprehensive details on troubleshooting network connectivity issues, including cabling problems.

A /23 subnet provides 512 total addresses, of which 510 are usable (subtracting 2 for network and broadcast addresses). This would satisfy the need for 255 additional addresses.