CompTIA N10-008 Practice Test - Questions Answers, Page 69

802.1X is a standard that enables the use of an AAA server in a domain environment by providing port-based network access control. 802.1X authenticates users or devices before granting them access to the network resources, and can also authorize them based on their roles or policies. 802.1X can work with different AAA protocols, such as RADIUS or TACACS+, to communicate with the AAA server.

CompTIA Network+ N10-008 Certification Study Guide, page 211

CompTIA Network+ N10-008 Cert Guide, Deluxe Edition, page 382

Configuring AAA Services - Cisco3

Tamper detection is a physical security feature that can alert the technician when someone opens the server rack door without authorization. Tamper detection sensors can be installed inside the equipment or on the rack itself, and they can send an alert via email, SMS, or other methods. Tamper detection can help prevent unauthorized access, theft, or damage to the network assets.

Physical Security -- N10-008 CompTIA Network+ : 4.51

2.4GHz frequency has better penetration and range than higher frequencies in forested environments, where there are many obstacles and interference sources.

Wireless in The Woods: Experimental Evaluation of IEEE 802.11a/b/g in Forested Environments1

High-Speed Wireless Access in Forested Rural Areas Using Analog Radio Over Fiber2

Duplex settings determine how data is transmitted and received over a network. If the devices have inconsistent duplex settings, such as half-duplex and full-duplex, they may experience performance issues, collisions, and errors. To troubleshoot the issue, the technicians should check the devices' duplex settings and make sure they match the network's configuration.

Gigabit Ethernet does not work - Microsoft Community1

Network Tests: Are We Getting Gigabit Performance?- Tom's Hardware2

CompTIA Network+ N10-008 Exam Objectives

: https://www.comptia.org/certifications/network#examdetails

The power budget is the total amount of power that a PoE switch or injector can provide to the connected PoE devices. If the power budget is exceeded, some of the PoE devices may not receive enough power to function properly. To troubleshoot this issue, the network administrator should check the power consumption of each PoE device and the power capacity of the PoE switch or injector.

PoE Troubleshooting: The Common PoE Errors and Solutions1

Security Camera Won't Work - Top 10 Solutions to Fix2

CompTIA Network+ N10-008 Exam Objectives

: https://www.comptia.org/certifications/network#examdetails

According to the CompTIA troubleshooting methodology1, testing the theory is the step where the network administrator verifies if the problem is caused by a specific factor or change. This step involves checking the system logs, running diagnostic tools, or performing other tests to confirm or eliminate the possible cause.

Troubleshooting Methodology | IT Support and Help Desk | CompTIA1

IP addresses beginning with 169.254.are calledlink-local addressesorAPIPA (Automatic Private IP Addressing)1.They are assigned by the computer itself when it cannot reach a DHCP server to obtain a valid IP address from the network2.This can happen for several reasons, such as a faulty router, a misconfigured network, or a disconnected cable3.

To troubleshoot this issue, the technician should check the network settings, the router configuration, and the physical connection of the computer. The technician should also try to renew the IP address by using the commandipconfig /renewin Windows ordhclientin Linux. If the problem persists, the technician may need to contact the network administrator or the ISP for further assistance.

A screened subnet is a network segment that is isolated from both the internal and external networks by firewalls or routers. It is used to host publicly accessible servers that need some protection from external attacks, but also need to be separated from the internal network for security reasons.

Reference

1: Seven-Second Subnetting -- N10-008 CompTIA Network+ : 1.4

2: CompTIA Network+ Study Guide: Exam N10-008, 5th Edition, page 56

3: CompTIA Network+ N10-008 Exam Subnetting Quiz, question 22

Port mirroring is a feature that allows a switch to copy the traffic from one or more ports to another port, where a network analyzer or a monitoring device can capture and analyze the traffic. Port mirroring is useful for troubleshooting and security purposes, as it allows the network engineer to see the traffic that is passing through the switch without affecting the normal operation of the network.

Reference

1: Port Mirroring - CompTIA Network+ Certification (N10-008): The Total Course [Video]

2: CompTIA Network+ Certification Exam Objectives, page 5

3: CompTIA Network+ N10-005: 2.1 -- Port Mirroring - Professor Messer IT Certification Training Courses

4: CompTIA Network+ N10-005: 1.4 -- Port Mirroring