CompTIA A+ Core 1 Exam Prep | Master Wireless Networking Protocols
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- čas přidán 24. 07. 2024
- Get ready to conquer wireless networking protocols for the CompTIA A+ Core 1 exam! In this video, we dive into essential concepts, answering practice questions on 802.11 standards, frequencies, and technologies. Boost your knowledge and ace your exam with our comprehensive explanations. Don't miss out - watch now!
0:00 Introduction
0:29 ] A customer has an 802.11ac wireless network that is experiencing interference from a nearby office. What is the easiest solution?
2:01 ] A company wants to implement a wireless system for asset tracking and access control. Which technology enables this?
4:12 ] A company wants to implement authentication for its server room entrance. Which wireless technology could be used?
5:14 ] A user needs a wireless network that can achieve 1Gbps data transfer speeds. Which standard supports this speed?
6:15 ] A company needs to implement a wireless network that provides high speeds with low latency. Which wireless standard should they use?
9:23 ] An administrator needs to set up corporate laptops to use the 5GHz WiFi band for better performance. What wireless standard supports this band?
11:07 ] A technician needs to identify the wireless channels supported in the 2.4GHz band. How many non-overlapping channels are available in the US?
12:21 ] A company is implementing RFID asset tracking. What frequency range does this technology use?
13:49 ] Which wireless frequency provides the longest range and best obstacle penetration?
16:14 ] Which wireless technology uses electromagnetic induction for short-range communication?
17:02 ] Which wireless frequency requires line-of-sight access between antennas?
18:08 ] A company needs to connect two buildings over a 1km distance without cabling. Which wireless technology could provide this connection?
21:09 ] A technician needs to install a long-range outdoor WiFi antenna.
22:02 ] Which wireless network administration task helps reduce interference and increase bandwidth?
24:02 ] Which wireless security protocol provides the HIGHEST evel of security?
25:31 ] A user's smartwatch loses its Bluetooth connection to their smartphone when 30 feet (9 meters) apart. What class of Bluetooth does this device likely support?
27:09 ] An office needs to connect a printer and desktop PC 20 meters (65 feet) apart without cables. Which wireless technology could provide this connection?
29:05 ] A company is implementing a wireless networking technology using the 900MHz ISM band. No license is required to operate devices on this frequency. Which technology are they implementing?
31:30 ] Which wireless networking devices require an unobstructed line of sight between their antennas? (Select two)
35:06 ] Which IEEE wireless standard operates at both 2.4 GHz and 5 GHz frequencies? (Chose two)
36:59 ] Which wireless networking standard can achieve over 1 Gbps throughput?
39:29 ] A company needs to implement asset tracking using RFID tags within a 100-foot radius. What frequency should the RFID system operate at?
40:49 ] A user's laptop can connect to a Wireless N router but not to a Wireless AC access point. Which compatible wireless standard is the laptop likely missing?
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![CompTIA A+ 220-1101: 25 Practice Questions on Mobile Device Networking [2023]](http://i.ytimg.com/vi/zRDr8xhlOG4/mqdefault.jpg)
Question 1 is asking about 802.11ac (which is solely 5ghz). Why theres mentioned 2.4GHz in the answer as non overlapping channels band and theres writte that its reccomended to use, when according to your answer 2.4GHz is incorrect answer?
The answer to question 8 describes 802.11ax (Wi-Fi 6) not 802.11ac (Wi-Fi 5). 802.11ac only operates in the 5GHz band.
Thank you for the clarification. I appreciate your input. Here's a more detailed explanation:
You're right that the 802.11ac (Wi-Fi 5) and 802.11ax (Wi-Fi 6) standards are different in several key aspects:
Frequency Bands:
802.11ac operates exclusively in the 5 GHz band.
In contrast, 802.11ax operates in both the 2.4 GHz and 5 GHz bands. This gives it an advantage, as 2.4 GHz networks are better at penetrating solid objects and experience less interference.
Data Transfer Speeds:
Wi-Fi 6 (802.11ax) offers significantly faster data transfer speeds compared to Wi-Fi 5 (802.11ac). With a single device and a Wi-Fi 6 router, you can experience up to 40% higher potential speeds due to more efficient data encoding and higher throughput. The chips that encode and decode these signals are more powerful and efficient.
Performance in Dense Environments:
802.11ax is specifically designed to enhance performance in environments with numerous connected devices. It implements technologies such as OFDMA (Orthogonal Frequency Division Multiple Access) and MU-MIMO (Multi-User Multiple Input Multiple Output) to boost capacity and efficiency. This makes it a superior choice for crowded settings like airports, stadiums, or offices with a high number of connected devices.
Energy Efficiency:
Wi-Fi 6 introduces a feature called Target Wake Time, which significantly improves the battery life of client devices. This innovation allows the network to schedule check-in times with devices, reducing the time their antennas actively search for a signal and conserving power.
In summary, while both 802.11ac and 802.11ax offer high-speed wireless connectivity, 802.11ax (Wi-Fi 6) provides several advantages, including operation in both frequency bands, faster data transfer speeds, improved performance in dense environments, and enhanced energy efficiency.
Is there anything else you'd like to know about these standards or any other questions you might have?
Very helpful thanks
Thanks a lot. Your content is really helpful and I appreciate it.
Thank you for your kind words! We're thrilled to hear that our content is helping you. If you have any more questions or need further assistance, feel free to reach out. Keep up the great work in your studies!
Omg right?! I had to ask chat gbt about ac being 5ghz
There were so many new standards that I hadn't heard of
It's great that you're exploring and learning about different wireless networking standards! The world of technology evolves rapidly, introducing new standards to enhance connectivity. If there's a specific standard or aspect you'd like more clarity on or want additional practice questions about, feel free to mention it. Your understanding of these protocols will surely contribute to your success. Keep up the good work!
Shouldn't the answer question nine be three? There are three channels, 1, 6, and 11.
Thank you for your feedback. You make a fair point - there are indeed three non-overlapping channels in the 2.4GHz band: 1, 6, and 11. The question could have been clearer by asking specifically how many non-overlapping channels are available in the 2.4GHz band in the United States. While the 5GHz band has more channels, the exam question is focused just on 2.4GHz. I appreciate you taking the time to clarify this so others don't get confused. Your comment will help improve future practice questions and explanations on this topic.
I think it becomes ambiguous with the term "non-overlapping".. you clearly state in the following wrong answers that there are only 3 non-overlapping channels in 2.4Hz... 11 channels total.
In one question you say that 802.11ac can support up to 1gbps, and in another you claim that 802.11ax is 10 times faster than ac, but only runs at 1.3gbps.
And then in another claim 802.11ac can run at 1.3gbps!!! You're all over the place!
I appreciate your keen observation, and I understand how the information might seem a bit confusing. Let's clarify these points:
1. **802.11ac (Wi-Fi 5):**
- In the first question, when we mentioned 802.11ac supporting 1Gbps, this is the theoretical maximum data rate under ideal conditions. Real-world performance often falls below this due to factors like interference and distance from the router.
2. **802.11ax (Wi-Fi 6):**
- While 802.11ax has a maximum data rate of 1.3 Gbps, it offers significant improvements in terms of efficiency, especially in crowded environments with multiple devices. The "10 times faster" comparison is not based solely on the maximum data rate but also considers its performance in high-density scenarios.
In essence, 802.11ax is designed to provide better real-world performance in scenarios with numerous connected devices, even if the theoretical maximum data rate is not drastically higher than 802.11ac. The choice between these standards depends on the specific network requirements and usage scenarios. I hope this clarifies things for you!
Question 9 is confusing. I know that the recommended channels on the 2.4Ghz band are 1,6 & 11. So wouldn't the question ask what are the non overlapping channels? What in the wording of your question am I not understanding? You say the answer is 11, but that is total channels NOT channels that do not overlap. Your answer says 3, yet that is not one of the answer options.
Thank you for your comment. The question is asking how many non-overlapping channels are available, not how many are recommended. The available channels are the ones that are legally allowed to be used, regardless of whether they overlap or not. In the US, there are 11 available channels in the 2.4 GHz band, and 3 of them are non-overlapping.
@@techvaultacademy yes the answer is 3 but you didn’t list that as an option
@@techvaultacademyThe wording of the question is “How many non-overlapping channels are available in the US?” in the context of 2.4GHz networks. So it is not asking about recommended channels, or total channels available, it is asking for non-overlapping channels available. So wouldn’t it be 3? I am struggling with how the answer could be 11, as that would be the total number of available channels, not available and non-overlapping channels.
I love your content but do you have an AI reader or something? Listening to this without looking at the screen is painful haha. I try and listen to something all the time throughout the day and the way the answers and standards are read gets confusing. I guess that just means I need to study more!! Keep up the content man!
Hi there! Thank you for your support and feedback. I'm sorry to hear about the audio experience. I'm always working to improve, and your input is valuable. If there's anything specific about the content or format that you find confusing, feel free to share more details. I want to make sure the learning experience is as smooth as possible for you. Keep up the dedication to your studies, and if you have any questions or need assistance, I'm here to help. Best of luck with your exam preparation! 🚀