Questions tagged [ieee-802.11]

For questions about the IEEE 802.11 series of protocols, also known as Wi-Fi. This tag should be used when asking about enterprise or corporate Wi-Fi networking questions. Questions about home wireless networks are off topic.

Filter by
Sorted by
Tagged with
0
votes
0answers
9 views

Monitor a Network Link for Reliability [closed]

Please can someone suggest a simple tool to monitor the reliability of a network connection? I've recently started working for a MSP (first job) and one of the clients I support has a small building ...
0
votes
0answers
29 views

Understanding IE Content - calculate checksum

I'm trying to understand article about calculate probe request 6-byte footprint. this what it say: First, a 6-byte footprint is initialized to zero (00: 00: 00: 00: 00: 00). The IEs of each Wi-Fi ...
0
votes
1answer
57 views

Probe Request getting\understanding Information Elements (IEs)

I'm trying to read Information Elements (IEs) from the probe request can't seem to understand the stracture of it as I undersatnd it size can be 0-2312 bytes but how do I know how many there are? I ...
5
votes
1answer
142 views

MAC collisions in Probe Requests

To find nearby routers, mobile devices send probe requests to coax the routers into sending probe responses. Since modern devices don't use their actual MAC address anymore but instead rely on MAC ...
1
vote
0answers
13 views

Error while installing CA cert for EAP-TLS [closed]

When trying to setup an EAP-TLS connection for my Wi-Fi authentication. I have to install CA cert and a user certificate in my device. This use to work perfectly fine until I upgraded my phone to ...
0
votes
1answer
30 views

WPA2 Enterprise with Radius and User Password authentication (via Active Directory) - Confidentiality

We are planning to setup WPA2 Enterprise in our Office. We have Ubiquity APs, a Unifi Controller and want to use Windows Credentials for authentication. We want to use a Linux Radius server (...
4
votes
1answer
458 views

Can a radio share a MAC address with the ethernet interface of an access point?

I have a situation where I have found the BSSID to have a MAC address congruent to the MAC address of the ethernet interface. Is this possible? Does this happen with all access points?
1
vote
0answers
58 views

Optimize Network For UDP Broadcast Traffic?

I have a computer that creates an AP which multiple microcontrollers connect to. The computer sends out UDP Broadcast packets that tell the microcontrollers to do different things. I have an issue ...
0
votes
1answer
16 views

Probe request from user devices broadcasting what frequency?

I have been researching whether a device with a wifi interface sends out signals in the RF spectrum. I have been a little here and there, and I understand that wifi devices uses active and passive ...
0
votes
1answer
21 views

Does a WiFi client vary the strength of the signal it emits? [closed]

I am using a metal container to dampen my WiFi router in the hope of reducing its radiation health risks. I'm wondering if the client device might increase its own emitted signal strength to ...
0
votes
1answer
39 views

Destination address in wifi frame for a host in a different network

I have couple of questions/doubts which I would like to get some advise on. Question#1 Suppose a STA A in infrastructure mode wants to send data to an exterior host (STA B), residing in different ...
0
votes
2answers
46 views

How does a border router work

Supposing, we have following pieces in a theoretical network architecture Network A: A low power IPV6 wireless network Some low power hosts: Low power devices which are connected to the above low ...
0
votes
1answer
54 views

Unwanted Wireshark Optimizing Received 802.11 Channel for Frames

I am trying to run an experiment which involves monitoring 3 wireless channels simultaneously in Wireshark which would allow me to see a single frame captured 3 times on each channel. To do this, I ...
2
votes
1answer
38 views

Can wifi clients in same subnet talk to each other without a WAP?

I understand that a L2 device like WAP is needed to forward packets from one client to another within the same network (based on MAC mostly like in 802.11) However my question is, if there is no WAP ...
0
votes
2answers
108 views

Is knowing MAC needed for talking to another device in same wifi network?

I have heard about ARP protocol for learning MAC address of other devices in a LAN for communicating with each other. However, I am bit confused about how it works in a typical infrastructure mode, ...
1
vote
1answer
47 views

how ieee 802.11s does channel switching? is it supported?

I'm studying about IEEE 802.11s wireless mesh networks every where on documents i read is pointed that all Mesh Point must be on same channel for discovery and peering. But i can't find anything about ...
1
vote
3answers
93 views

Using 40 MHz wide channels in a 2.4 GHz wireless network deployment

We have a site (a secondary school) where all WiFi networks are managed by us. The building should in theory have no rogue APs that introduce interference, however, other RF emitters such as ...
0
votes
2answers
39 views

How to tell if a device on the network is an access point?

Let's say we have a network with multiple access points. The command arp -a can be used to list the IP addresses and physical addresses of the devices that are on the same network. Now, is there a way ...
0
votes
0answers
15 views

For DCF (Distributed coordination function) based WLANs, in what scenario can cause frame collisions?

I am studying network communication and get confused about this concept. Since I know DCF has the backoff scheme for frame transmission and will sense the channel status before start transmit data. So ...
5
votes
2answers
864 views

Why are there 11 channels in WiFi communication instead of 3?

I'm a little confused about subdividing the WiFi radio band into 11 channels in the USA, 14 in Japan, and 13 in Europe, and to then use just 3 of them because of the overlapping problem. Why didn't ...
0
votes
0answers
26 views

How to determine which Wifi channel offers the least interference?

I'm trying to set up a roaming wireless network. For this, I have tried to analyze the area of coverage for any external network interference. I do know that networks can change over time and Wifi ...
0
votes
0answers
21 views

How is it possible that CSMA/CA works in areas with a lot of users within a small radius (e.g. rallies, concerts, etc.)?

My understanding of CSMA/CA is that devices listen until a Wi-Fi channel is idle before sending packets. If a collision still happens, then the devices waits a random interval before attempting to ...
1
vote
1answer
40 views

UniFi Network Controller WLAN channel display meaning

I don't quite understand the WLAN channel display. Elsewhere in the UniFi Network Controller, the channel is set to 1. But what does the number 3 in the display below mean? To clearify the situation ...
9
votes
1answer
3k views

Is wifi power consumption related to password length

For wifi the Max password length is 63 characters. When I choose such a long password will this lead to notably higher power consumption of the network device (router, smartphone, ...)? I would guess ...
0
votes
0answers
132 views

802.11s versus IBSS mesh (with layer 3 routing protocol)

I just learned that you can create a Wi-Fi mesh network either with the "native Wi-Fi mesh standard" 802.11s, or by putting all devices of the network in the IBSS mode and run a layer-3 mesh ...
0
votes
2answers
50 views

Where does the 4way handshake fit in with the 802.11 Authentication Frame

In an open network you have the authentication frame on just the 802.11 level: but if the network has WEP or WPA(2/3) there will also be a four way handshake: My question is, where does the 4 way ...
1
vote
1answer
92 views

Difference between standards, protocols and working groups?

I am trying to understand the meaning of standards, protocols and working groups. I read that the 802.11 of the IEEE organization is a working group, trying to implement some standards. I think that I ...
0
votes
3answers
48 views

How does the network client pick a wifi signal, given two available frequencies?

This might be basic, but I don't know the answer... Given a router and a client, both having 2.4G (slower, more range) and 5.XG (faster, less range) frequency radios (and both named with the same SSID ...
0
votes
1answer
60 views

Mesh network 802.11d vs adhoc

What is the difference between 802.11s and adhoc? Is it compulsory to have same channel for wireless mesh node or it can have created using different channels where neighbouring nodes on on 2 non ...
3
votes
0answers
33 views

Mixing 802.11 channel widths

I don't want to dive too deep into Apple's approach to 802.11 other than to say it's what sparked this question. Apple's CoreWLAN setWLANChannel() method allows macOS application to set the NIC wifi ...
1
vote
2answers
599 views

What's the relation between IEEE 802.11s Mesh and the Wi-Fi Certified EasyMesh?

We know there's the the IEEE 802.11s mesh amendment that operates on the L2 MAC layer There's also the Wi-Fi Alliance's "Wi-Fi CERTIFIED EasyMesh™" thingy for bringing mesh interpretability ...
1
vote
2answers
40 views

Does a low WIFI signal affects how many clients can connect?

We have a room which is not very close to the AP and the signal is low. But a laptop with a quality radio connects perfectly. I am wondering if this will change when the number of clients grows? Such ...
0
votes
1answer
17 views

WiFi AP mode. Is AP bradcasting SSID all the time or when it receives the request from the station

WiFi AP mode. Is AP bradcasting SSID all the time or only when it receives the request from the station? I cant find the answer and maybe someone of you guys know the answer.
0
votes
1answer
54 views

Does each node in a Wi-Fi mesh system broadcast its own separate SSID?

From previous experience of both setting up and managing Wi-Fi extenders, my understanding from carrying out scans of the 2.4/5GHz bands is that each extender broadcasts its own SSID - however, I'm ...
1
vote
2answers
745 views

WLC <-> AP CAPWAP communications and ports

According to this document, you need to open UDP 1024 - 65535 between WLC (source) and APs (dest). And it's correct - I can see these sessions getting dropped on my firewall since I didn't open those ...
1
vote
1answer
91 views

Wireless, powerline or ethernet right next to electric cable

I need a new point of access to our existing network. We have power sockets but no Ethernet cable on the spot. I see three possible solutions to achieve this: Add a new WiFi6 router and connect it to ...
1
vote
1answer
117 views

wireless network with seamless roaming with APs from different vendors

I've been reading about seamless roaming and IEEE 802.11k/v/r standards, but from a practical point of view it is not clear to me. I want to deploy a set of access points, all connected between ...
0
votes
0answers
77 views

If two Wi-Fi access points share the same BSSID, does it mean that they work on the same channel?

It is my understanding that if an ESSID is used by several sets of APs on several channels (let's say one AP = one channel only), then two APs sharing a BSSID should also share their radio ...
1
vote
1answer
108 views

Do all devices which use Wi-Fi (802.11) use CSMA/CA?

I know this is quite trivial, but I just want to know if all devices which support Wi-Fi through interface cards/hardware (like laptops/PCs/phones..etc) use CSMA/CA irrespective of their router/...
0
votes
1answer
69 views

How is a video calls bandwidth reserved on a wifi network?

All the older versions of Wifi, except for Wifi-6, give each device on the network the entire bandwidth /highway no matter how small the amount of data it needs to transfer. Can someone explain how ...
0
votes
1answer
39 views

CAPWAP encryption

I'm new to wireless networking and I have a question that might be dumb. Regular 802.11 uses AES/TKIP encryption. CAPWAP uses DTLS encryption, but CAPWAP is also 802.11 spec. Can you please explain ...
0
votes
2answers
104 views

List of frequencies that a device can connect to over 2.4 and 5 GHz channels

When connecting to a Wifi on 2.4GHz or 5GHz channel, a device connects on a certain frequency. Is there a somewhere list of all possible frequencies that a device can connect to on a 2.4GHz/5GHz ...
1
vote
0answers
110 views

How should OSPF work over WiFi? [closed]

I've had problems running OSPF over my WiFi network, and it seems to be related to multicast. The routers can't maintain a neighbor relationship, and when I watch the packet traffic I see one router ...
5
votes
2answers
1k views

Do I need to re-authenticate every time I switch a access point?

I have multiple Access Points on the same network with a Radius server for authentication. When I switch from one AP to another, do I have to go through the complete re-authentication processes each ...
1
vote
1answer
73 views

Does tcpdump work differently from Omnipeek?

I have been trying to analyze packets using tcpdump. I am trying to use a wireless card and capture packets through monitor mode, instead of promiscuous mode, since I want to see what kind of traffic ...
0
votes
1answer
66 views

i am so curious about naming IEEE standard network,like why do we use "802" these three numbers? [duplicate]

I learnt some information about networks in Wiki,and I am so curious about naming IEEE standard networks. As far as I know: The standard name of Wifi is 802 The standard name of Ethernet is 802.3 The ...
0
votes
1answer
42 views

Range of router and device in WiFi [closed]

Is range of the wifi network depend on Router only? Or does it depend on the connection device also? I believe that the device need to transmit packet to router, so the range till which the device can ...
1
vote
3answers
113 views

Have we failed a wireless survey for something that couldnt have been offered?

On a large campus wireless network (approx. 500 APs, 4-5000 connected devices) we have been asked to create an SSID for some specific equipment that can only work on the 2.4Ghz range. No problems with ...
1
vote
2answers
59 views

Reconciling multiple definitions of Bandwidth

I am confused about the meaning of the term 'Bandwidth' in a wireless transmission environment. The two most common definitions I could find are: difference between the upper and lower frequencies in ...
0
votes
1answer
112 views

How many 160Mhz channels can 801.11ax support? [closed]

With an 801.11ax WLAN, how many simultaneous connections could be made using 160Mhz wide channels?

1
2 3 4 5
8