N10-009 Exam Dumps - CompTIA Network+ Certification Exam

MIB (Management Information Base): A MIB is a database used for managing the entities in a communication network. The MIB is used by Simple Network Management Protocol (SNMP) to translate events into a readable format, enabling network administrators to manage and monitor network devices effectively.

Function of MIB: MIBs contain definitions and information about all objects that can be managed on a network using SNMP. These objects are defined using a hierarchical namespace containing object identifiers (OIDs).

CompTIA Network+ materials discussing SNMP and MIB functionality​​.

If a ping to 10.0.100.19 is unreachable, the most likely issue is that users are on the wrong subnet and cannot communicate with the server.

Breakdown of Options:

A. The users are on the wrong subnet. ✅ Correct answer. If users are on a different subnet without proper routing, they won't reach the server.

B. The DHCP server renewed the lease. – Would change the client’s IP, but the server’s static IP should remain unchanged.

C. The IP address was not reserved. – DHCP reservations matter for dynamic IPs, but RDP servers typically have static IPs.

D. The hostname was changed. – Would affect DNS resolution, but pinging the IP directly would still work.

If a switch has port security enabled (such as sticky MAC or a configured allowed MAC), the port will only allow the original NIC’s MAC address. When a new NIC with a different MAC address is installed, the port rejects traffic, preventing network connectivity.

B. BPDU guard protects against rogue switches, not end hosts.

C. Link aggregation applies when bundling multiple uplinks, not a single PC connection.

D. PoE budget applies to powered devices like APs, not PCs.

References (CompTIA Network+ N10-009):

Domain: Network Troubleshooting — Port security, MAC address filtering, switch security features.

A system has reachedend-of-supportwhen thevendor no longer provides patches, updates, or bug fixes. This significantly increases the risk of security vulnerabilities and is a major operational concern.

If the user cannot communicate with 192.168.10.1, they might be on a different subnet. Changing the subnet mask to 255.255.255.0 ensures the user and the file server are in the same subnet.

Breakdown of Options:

A. Changing the IPv4 address to 192.168.10.1 – This would conflict with the server's IP.

B. Changing the subnet mask to 255.255.255.0 – ✅ Correct answer. Ensures both the user and the server are on the same subnet.

C. Changing the DNS servers – DNS does not affect local network connectivity.

D. Changing the physical address – The MAC address does not impact subnet communication.

Changing default admin passwords is a fundamental first step in device hardening to prevent unauthorized access.

The server’s subnet mask is 255.255.255.224 (/27), which covers IPs from 192.168.100.224 to 192.168.100.255. However, the router only recognizes 192.168.100.0/24, indicating a mismatch between the server’s subnet and the router's network.

Correct mask for the /24 network is 255.255.255.0, allowing 256 IPs from 192.168.100.0 to 192.168.100.255.

This mismatch would result in routing issues, especially with the gateway outside of the subnet range.

📘 Reference:

CompTIA Network+ N10-009 Official Objectives: 5.2 – Given a scenario, troubleshoot common wired connectivity issues.

A split-tunnel VPN allows some traffic to be routed through the VPN while other traffic goes directly to the internet. This setup offers several advantages, with a primary one being cost-effectiveness due to cloud-based traffic not consuming company bandwidth.

Bandwidth Utilization: Split-tunnel VPNs reduce the amount of traffic passing through the company's network, freeing up bandwidth for other uses.

Performance: By allowing internet-bound traffic to bypass the VPN, it can reduce latency and improve the performance for users accessing cloud services directly.

Cost Savings: Reduced load on the company's VPN infrastructure can lead to lower costs in terms of both hardware and bandwidth.

Network References:

CompTIA Network+ N10-007 Official Certification Guide: Covers VPN types, including split-tunnel configurations and their advantages.

Cisco Networking Academy: Discusses VPN technologies and the benefits of split-tunneling.

Network+ Certification All-in-One Exam Guide: Provides detailed information on VPN setups, including the cost-effectiveness of split-tunnel VPNs.

By allowing cloud-based traffic to flow outside the company’s network, a split-tunnel VPN optimizes resource usage and enhances the overall network performance without incurring extra costs for bandwidth.