TIL that the β€œFi” in Wi-Fi doesn’t stand for anything. It is simply a trademark term of the non-profit Wi-Fi Alliance for a family of wireless network protocols based on IEEE 802.11 standards webopedia.com/definitions…
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πŸ‘€︎ u/st314
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I wanna know... How does Bluetooth work in pc's? Like I have no experience with gaming computers. Have only played on a laptop. I'm thinking of getting this pre-built with a Wifi IEEE 802.11ax + Gbit

Like I have no experience with gaming computers. Have only played on a laptop. I'm thinking of getting this pre-built with a Wifi IEEE 802.11ax + Gbit LAn. Though there is nothing about Bluetooth, if it doesn't have Bluetooth after I buy it, is there a way to customize it to have Bluetooth? Is it something in the motherboard or another different component?

Edit: here's the link to the pc https://arvutitark.ee/est/tootekataloog/Arvutid-ja-lisad-Lauaarvutid-Brand-Manguri-PC/MSI-MPG-Trident-3-10th-i5-10400F-8GB-HDD-1TB-SSD-512GB-GTX-1660-SUPER-6GB-Win10Home-INTEL-MARVELS-AVENGERS-529953

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πŸ‘€︎ u/ZenMexed
πŸ“…︎ Feb 28 2021
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IEEE 802.15.6 - Can anyone help me out?

I am a totally newbie in this field- yet my professor asked me to do a presentation and a 15 page long writing about this protocol. I AM NOT AT UNIVERSITY, yet I have to perform as if. I am doing really poorly. I've tried to cover the PHY and MAC specifications as best as I can but still.
One of my biggest issues is that I don't understand the used modulation schemes at all. I also don't find any information which I understand. Can anyone help? I would be so thankful!

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πŸ‘€︎ u/GrandBassLeg
πŸ“…︎ Feb 25 2021
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IEEE 802.3ca 25G/50G-EPON standard approved (for future fiber optic internet) lightwaveonline.com/fttx/…
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YSK: There is a 750ms +/- 10ms link failure holdover built into the 1000BASE-T IEEE 802.3 standard.

For multigig copper links, this holdover is increased to 2000ms.

The specific timer is called β€œmaxwait_timer” which counts the time a receiver spends in the β€œNOT_OK” state.

This behavior can be overwritten in some specific PHY chips but generally is in there by default.

What this means is for applications with extremely low latency failover requirements you should either be using 100mb copper or any bandwidth of fiber. Fiber does not have this holdover and will detect failure as soon as the receiver loses the optical signal.

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πŸ‘€︎ u/phantom_mood
πŸ“…︎ Sep 04 2020
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Is Google ever going to activate the IEEE 802.15.4 Thread (2.4 GHz) for the 2nd Gen Nest Wifi?

It has been over a year since the router was released

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πŸ‘€︎ u/su43berkut17
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I hope wireless routers exist and can send packets of information over the airwaves using IEEE 802.11 technology standards

Or is that impopsicle?

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πŸ‘€︎ u/ShoveAndFloor
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IEEE 802.11 Frames and How to Get Them splone.com/blog/2020/9/22…
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IEEE 802.11 Frames and How to Get Them splone.com/blog/2020/9/22…
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Are there any IEEE 802.11ah modules available for use in the UK?

I am interested in making a IEEE 802.11ah communication link using Raspberry Pi. There is not much info online about IEEE 802.11ah use in the UK. it seems the 900mhz band is not available in the UK, so the equipment would need to run at a different frequency.

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πŸ‘€︎ u/Nick-Inventor
πŸ“…︎ Jun 01 2020
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What Switches do you use for IEEE 802.3ad Dynamic Link Aggregation?

I am a very happy user of the Synology DS918+. I wanted to ask the sub if there is a specific recommendation (low cost, bang for buck solution) for the use and support of IEEE 802.3ad Dynamic Link Aggregation to achieve bonded 2 GB access to my Synology NAS.

-Callahan-

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πŸ‘€︎ u/hcallahan697
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Questions about 10GBASE-T (IEEE 802.3)

I have an server running CentOS 7 with a 10GB PCIe card in it.

  • We're using 10Gb duplex MM fiber transceivers in this device. However, it seems that 10GBASE-T is copper-medium specific. Is this correct?
  • Linux ethtool reports the supported link mode is 10000baseT...Is this the same as 10GBASE-T in terms of IEEE specifications?
  • Is auto-negotiation immutable for 10GBASE-T/10000baseT?

Thank you for your help.

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πŸ“°︎ r/IEEE
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πŸ‘€︎ u/trollinDC
πŸ“…︎ Jun 19 2020
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Why does the IEEE 802.11n draft prohibit using High Throughput with WEP or TKIP as the unicast cipher.

I recently came across across a project who's FAQ said

> If using TKIP for encryption with WPA, you will be restricted to 54 Mb/s. This is because the IEEE 802.11n draft prohibits using high throughput with WEP or TKIP ciphers.

What is the reasoning behind this?

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Is it possible to obtain access to the latest IEEE 802.3ad standard without having to Pay IEEE for access?

I'm trying to troubleshoot some issues regarding LACP at a low level but unfortunately I only seem to get access to the 1998 version for free. Juniper's documentation has been a blessing but I would feel a bit more confident knowing that I'm referring to the protocols bible basically.

Edit: I was able to obtain access through my Universities IEEE Explore subscription

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TIL Wi-Fi doesn’t stand for anything; it’s a made up word. "IEEE 802.11' didn't have much of a ring to it, and the industry association wanted a catchy name. They came up with wi-fi, and that's what's been used ever since.” scientificamerican.com/ar…
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πŸ“°︎ r/todayilearned
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πŸ‘€︎ u/thecatsmilkdish
πŸ“…︎ Feb 13 2018
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TIL that the term "Wi-Fi" is a brand name created to sound catchier than 'IEEE 802.11b Direct Sequence'. It is not short for anything including "wireless fidelity," which was only coined after the fact as a backronym en.wikipedia.org/wiki/Wi-…
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πŸ‘€︎ u/surf_bort
πŸ“…︎ Mar 02 2019
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Question about Odom's official cert guide, particularly about IEEE 802.3 Fiber Standards.

So I've been going back and forth between Neil Anderson on Udemy and free Youtube courses, then reading the Odom official cert guide to review everything. One thing I noticed in the cert guide is that it lists the IEEE 802.3 10-Gbps fiber standards as:

  • 10GBASE-S
  • 10GBASE-LX4
  • 10GBASE-LR
  • 10GBASE-E

whereas every other resource I've seen (Youtube, Udemy, Wikipedia) seems to have different names for most of these. For example, I've been studying that 10GBASE-SR is the name of the 400m multimode cable, but the book lists it as 10GBASE-S which I can't find anywhere else online.

I'm probably going crazy over this for no reason and assume I should just memorize what's in the book and ignore other info, but is this an issue with the book or is there some industry standard where you abbreviate the name that I'm not aware of?

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πŸ‘€︎ u/DEyeFly
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Article about the DW1000 (IEEE 802.15.4-based radio transceiver) driver I wrote in Rust braun-embedded.com/dw1000…
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πŸ‘€︎ u/hannobraun
πŸ“…︎ Mar 31 2020
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[Blog] Deep Dive - IEEE 802.1D Spanning Tree Topology Change Mechanism

EDIT: Spelling/grammar mistakes, as well as correcting some debug output. Thanks /u/erh_!

While reviewing the IEEE 802.1D Spanning Tree Protocol Topology Change Notification mechanism, I had some confusion as to the exact behavior that each bridge exhibits when a topology change occurs. This post documents my journey to alleviate this confusion in the lab!

Please note that this is an adaptation from a full post on my blog. I've tried to modify the formatting to fit better on Reddit - however, you may find the original content easier to enjoy. You can find the original blog post here.

Scope

During my CCIE studies, I understood that there were two types of BPDUs - a Configuration BPDU and a Topology Change Notification BPDU. However, I was unclear which bridges create which BPDU in a topology change scenario. Specifically, I wanted to clarify the following points:

  1. When a topology change occurs on a non-root bridge (such as in the event of a link flap), what type of BPDU does that bridge create?
  2. When an intermediate bridge receives a topology change notification from a downstream bridge, what type of BPDU is sent towards the root bridge, and what type of BPDU is sent towards the downstream bridge?
  3. When a topology change occurs in a spanning tree, what type of BPDU do bridges not in the path of the topology change notification receive?

To answer these questions, I decided to test in the lab!

Topology

The topology that we are working with can be found here.

Bridge ID and IP address information is as follows:

Node Name Bridge ID IP Address
Root 5e00.0000.0000 192.168.1.1
S1-1 5e00.0001.0000 192.168.1.100
S2-1 5e00.0002.0000 192.168.1.103
S1-2 5e00.0003.0000 192.168.1.101
S1-3 5e00.0004.0000 192.168.1.102
S2-2 5e00.0005.0000 192.168.1.104
S2-3 5e00.0006.0000 192.168.1.105
H1-1 N/A 192.168.1.10
H1-2 N/A 192.168.1.20
H2-1 N/A 192.168.1.30
H2-2 N/A 192.168.1.40

Lab Materials

This lab was completed with a VIRL 1.6.65 server using the following nodes:

Node Name Operating System Version
IOSv IOS 15.7(3)M3
IOSvL2 IOS 15.2

Default Configuration

By default, all nodes were configured with their hostname, as well as the following configuration:

no ip domain-lookup
service timestamps debug datetime msec
service timestamps log datetime mse
... keep reading on reddit ➑

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πŸ‘€︎ u/_chrisjhart
πŸ“…︎ Dec 22 2019
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IEEE 802.3at PoE+ clarification

If the ethernet switch port i have can output 30W max. Does that mean i have 30W available for my devices or 25.5W (according to IEEE802.3at). Say i connected the port to a PoE splitter, is there 30W going into the splitter or is there 25.5W?

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πŸ‘€︎ u/Daplaymaker534
πŸ“…︎ Feb 12 2020
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What does GHz mean in relation to IEEE 802.11a (Wi-Fi Protocoll)?
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πŸ‘€︎ u/chefniklas
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Enhancement of IEEE 802.11 in Handling Multiple Broadcasting Audio Data in Wireless ad-hoc Networks (May 2013)

Summary of Publication:

> Although modern WiFi technology has enough bandwidth to handle multiple audio channels, the current 802.11 standard has numerous defects that prevent widespread adoption for professional live audio. By augmenting the MAC algorithm used in the standard, many of the inherent problems can be addressed. For example, the use of CTS-to-Self was modified in order to distribute in broadcasting mode, the time the network is occupied for each transmission. This reduces the number of backoff counts and dropped packets. An Exclusive Backoff Number Allocation algorithm was also added in order to decrease the probability of collision while maintaining fairness and limiting delay to an acceptable level. A simulation of the modified 802.11 MAC algorithm showed drastically improved performance.


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πŸ“…︎ Feb 18 2020
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Everyone knows what WiFi is, but no one knows it stands for β€œIEEE 802.11b Direct Sequence”
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IEEE 802.11ay: Next-generation 60 GHz Communication for 100 Gb/s Wi-Fi (PDF) networks.rice.edu/files/2…
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πŸ‘€︎ u/Balance-
πŸ“…︎ Oct 30 2017
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Wenn dir bei der NVS PrΓΌfung nicht alle IEEE 802.11 Normen seit 1997 auswendig kannst
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πŸ“°︎ r/Spengergasse
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πŸ‘€︎ u/HP_Bergster
πŸ“…︎ Nov 05 2019
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First release of ieee802154 0.1 - Partial implementation of the IEEE 802.15.4 standard users.rust-lang.org/t/fir…
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πŸ“…︎ Feb 08 2019
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[Release] DW1000 Driver version 0.1.0 (IEEE 802.15.4 transceiver) users.rust-lang.org/t/rel…
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πŸ“…︎ Feb 20 2019
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