CompTIA N10-008 Practice Test - Questions Answers, Page 36

Cat 7 is a type of twisted-pair copper cable that supports up to 40 Gbps bandwidth and up to 100 meters cable length. Cat 7 is suitable for long cable runs that require high-speed data transmission. Cat 7 has better shielding and crosstalk prevention than lower categories of cables.

Reference: Network+ Study Guide Objective 1.5: Compare and contrast network cabling types, features and their purposes.

A network performance baseline is a set of metrics that represents the normal operating stateof a network.It can be used to measure the impact of changes, identify anomalies, andtroubleshoot issues12.A WAN technician should consider the network performance baseline first when identifyingnewly installed hardware that is causing outages, because it can help determine what haschanged and how it affects the network performance3.VLAN assignments, routing table, and device configuration review are also important factors toconsider, but they are not the first step in troubleshooting.They can be used to verify theconnectivity, routing, and configuration of the new hardware, but they do not provide a clearpicture of the network performance before and after the change3.CompTIA Network+ N10-008 Study Guide, Chapter 5: Network Monitoring and Troubleshooting,pages 248-249, 264-265.[Professor Messer's CompTIA N10-008 Network+ Course Notes], Section 5.1: NetworkTroubleshooting Methodology, pages 48-49.[Professor Messer's CompTIA N10-008 Network+ Training Course], Video 5.1: NetworkTroubleshooting Methodology, [6

The question describes a scenario where a network event is causing all communication to stop,and the network administrator can only access the switch using the serial console port, not SSH.This suggests that the problem is related to the network layer or below, as SSH operates at theapplication layer and requires network connectivity to function.The port statistics show a huge discrepancy between the total receive and transmit rates, aswell as the unicast and broadcast/multicast packets per second. This indicates that there is a lotof traffic being generated and forwarded within the network, but not reaching the intendeddestinations. The most likely cause of this excessive traffic is a switch loop, which occurs when there aremultiple paths between switches that create a circular flow of data. Switch loops can causebroadcast storms, MAC address table instability, and network congestion, leading to networkoutages.To verify this, the network administrator should use a tool such as Spanning Tree Protocol(STP), which is designed to prevent and detect switch loops by blocking redundant links andelecting a root bridge. STP can also provide information about the topology and status of thenetwork, such as the root port, designated port, and blocked port for each switch.Reference:CompTIA Network+ N10-008 Study Guide, Chapter 2, Section 2.3, Switching Technologies, page741Professor Messer's CompTIA N10-008 Network+ Course Notes, Section 2.3, SwitchingTechnologies, page 132Professor Messer's CompTIA N10-008 Network+ Training Course, Video 2.3 - SwitchingTechnologies, 12:00 - 14:003

Reference: https://docs.oracle.com/cd/E19455-01/806-6547/6jffv7oma/index.html

- the microwave was already removed from the office

- the signal is OK now

- Notice that the question mentions "numerous cubicles and wooden walls" - meaning the signal now won't have the interference as before

- KEY POINT: the admin wants to "maximize the range of the signal:"

Manually change the frequency to 2.4 GHz for more reliable speeds and range. While 5 GHz gives you a stronger signal, it doesn't travel through walls or ceilings as well, so it doesn't give you the best range.

"Microwave ovens: Older microwave ovens, which might not have sufficient shielding, can emit relatively high-powered signals in the 2.4GHz band, resulting in significant interference with WLAN devices operating in the 2.4GHz band."

"Benefits of Voice VLAN

It ensures that your VoIP (Voice over Internet Phone) devices do not have to contend directly with all the broadcasts and other traffic from the data VLAN. A voice VLAN can simplify network configuration in some circumstances."

https://community.fs.com/blog/auto-voip-vs-voice-vlan-what-s-the-difference.html

Jumbo Frames

"When jumbo frames on a VoIP/UC network are enabled, it can cause the same kind of delay to your network transmissions."

"VoIP uses will always not benefit from jumbo frame, as VoIP like gaming, is latency and time sensitive. Jumbo Frame for Internet Purpose: You will not see any performance boost as the files that came across the internet does not support jumbo frame."

https://www.ankmax.com/newsinfo/1358641.html#:~:text=VoIP%20uses%20will%20always%20not, does%20not%20support%20jumbo%20frame.

"To summarize this general best practice guide, you should NOT enable jumbo frame feature as a general home user."