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For questions about wireless networking (802.11), including any licensed or unlicensed RF medium used to provide point-to-point or point-to-multipoint network links.

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Decentralized instance communication

I intend to build an application that will run on several devices and its main task is storing and presenting data. This application will be deployed to several devices. These various instances should ...
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2answers
22 views

802.11X family security protocol identification stage

In what stage (Probing?) in the connection process does the AP "tells" the host it's security protocol? (e.g. "I'm using WEP,WPA etc.) I've sniffed a packet using wireshark but I can't find any ...
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Communication across subnets [on hold]

Ok, So first things first: I know what a subnetmask is, and what it is used for. But I have no idea how to properly set it Above is my home network, I have my dhcp server set to the router (192.168.0....
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2answers
22 views

Putting directional antennae on 2602e, one on the A port, one on the B port and one on the C port to cover 3 different aisles

on setting up the access point I have put one directional antenna on the 2602e A port to go down on aisle, one on B to go down another, and finally one on C to go down a third aisle. Is this a bad ...
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2answers
77 views

connection to AP after what stage? 802.11b protocol

I'm seeing several devices trying to connect to an AP (using wireshark), several send and receive the "Probe response" message (802.11) But the don't even send the association request. Why is that? ...
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0answers
14 views

Unexpected TCP throughput performance over 802.11ac wifi with different TCP streams and different antenna numbers [on hold]

I have seen similar questions like mine. However, none of the solutions have fixed my issue. The question is as follows: I have 2 different devices under test (DUT). One has 3x3 antenna configuration,...
2
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1answer
23 views

Can I setup a WLAN with just a Access Point and Switch

Is it possible to setup a WLAN with an Access Point and a Switch only? I would like to connect wireless devices wireless to the access point which is connected to the switch. Then, have another ...
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3answers
46 views

Is there any relation between MAC addresses of a dual band (2.4 and 5 GHz) router?

I have a use case where I need to determine whether two MAC addresses belong to the same router with dual band connection 2.4 GHz and 5 GHz. When I did some study, I found that the MAC address of ...
3
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2answers
58 views

How the packet is routed between two host from same sub-net and associated with same AP?

Given host 'A' and 'B' have IP 10.10.0.5 and 10.10.0.8 respectively, the sub-net mask for both are 255.255.255.0, both 'A' and 'B' are associated and connected to the same AP, and the AP is connected ...
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1answer
40 views

Counting the Number of re-transmission for a single UDP packet transmission in IEEE 802.11?

I was working with a client-server project based on UDP and 802.11 as a link and physical layer. There, the client was trying to probe some packets in the wireless channel to gauge channel condition. ...
6
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2answers
357 views

How is the Groupwise Transient Key used in WiFi networks?

In Wifi WPA, I understand that during association, a 802.11 client and AP negotiate a Pairwise Transient Key (PTK), using which the Groupwise Transient Key(GTK) is provided to the station. I ...
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2answers
63 views

Does WiFi broadcast traffic from a station go through the access point?

Let's say I've got two devices connected to my Access Point, a laptop and a tablet. If the laptop sends unicast traffic to the tablet, I understand that it must go through the AP. However, how is ...
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0answers
15 views

How to setup a WLAN with IPV6 on packet tracer?

Can't find the answer anywhere. I have a nice wired IPV6 network on packet tracer and the next step is to add a WLAN that also uses IPV6 for its clients, but none of the routers have CLI to try ...
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0answers
17 views

Cisco Wifi phones unregistration from CUCME

I have: two Cisco Wifi access points AIR-AP1832I-E-K9 (AP1 and AP2) and two Cisco wireless phones CP-8821 (P1 and P2). Phone P1 P1 usually connects to AP1 and never connects to AP2 except if it is ...
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0answers
41 views

“MAC address change detection” in “Wireless Sensor Network”?

According to this answer : https://networkengineering.stackexchange.com/a/53058/36813 in a Cisco environment, we can use port-security to prevent hosts from changing MAC address on a port. Assume we ...
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5answers
4k views

Do WiFi and IEEE 802.11 mean the same thing?

I would like to know if WiFi can be generally referred to IEEE 802.11 standard in the context of IoT/machine-to-machine communications or the latter can be referred to as a more general family. I have ...
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0answers
20 views

Macbooks randomly disconnecting from wifi about twice a day [closed]

I kind of placed into a network admin position due to my proximity of the hardware and very slight knowledge of the subject at a growing company. One of our offices is in a super crowded area and all ...
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0answers
18 views

Limited bandwidth on pfSense

I'm using pfSense Community Edition - v 2.4.3-RELEASE(amd64) in a group of wireless routers. I want to limit the users of this network to only be able to download at 40% of the speed limit of 5 Mb/s. ...
0
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1answer
35 views

How are 802.11 neighbors communicated to APs?

The 802.11k specifies that an STA can send a "Neighbor Report Request". I understand how the STA sends and gets that from the AP, but how does the AP get this information from other APs? Also, how ...
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0answers
14 views

Device, how does it receive from wifi extender and router

I was wondering how it works if your device would be between the router and the wifi extender, wich one it would process, and how it knows wich one to process. Thanks in advance everyone!!!
1
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1answer
457 views

802.1x and use Google G Suite Directory as LDAP

Has anyone managed to authenticate yours to the network via 802.1x using Google Directory? I have a case where whole company is using Google Apps and G-Suite with a custom domain and they would like ...
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0answers
16 views

If the RSSI of the Telecommunication tower is working, is working, is the tower operationable?

This picture was taken in a Telecommunication company's main telecommunication tower. The telecommunication company never asked permission from the land owner before eracting their big ...
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0answers
15 views

BLE and BT Classic coexistence

we are designing a fairly compact PCB for a communications device. We are looking at using BLE as a link for voice to a separate microphone, and BT Classic to be paired with a smartphone. We are using ...
1
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1answer
70 views

How is collision detected in 802.11n WiFi networks?

IN CSMA/CA, suppose the channel is idle. Two nodes that have been waiting for the same backoff time, start transmitting simultaneously. The nodes detect the collision and double the Contention Window ...
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1answer
17 views

What is the general Traffic Flow of 2 Clients connected to the same AP?

If Client A and Client B are both connected to Access Point C and A + B want to talk to each other, does C act as a switch between the two of these clients or does C have to send that traffic back to ...
1
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1answer
49 views

how to get RSSI information of WiFi users in wireshark?

If I'm able to get 802.11n traffic with my network adapter, would I be able to see the RSSI information? what should be the filter to see it?
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2answers
53 views

How does a wireless repeater ascertain the destination MAC address of a wireless client?

While diving into the depths of wireless networks I have come across the different address fields in the MAC header of 802.11 network frames. A few thought experiments later I was confused about a ...
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2answers
65 views

Wireshark expression filters for wireless capture

1) What Wireshark expression filter stack can I utilize to discover how many devices are transmitting in the 2GHz and 5GHz spectrum in a packet capture? 2) What Wireshark expression filter stack can ...
0
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1answer
41 views

Why wait DIFS time before sending in CSMA/CA?

Why wait DIFS time before sending in CSMA/CA
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0answers
298 views

WLC & VLANs - Packet Tracer

I'm trying to learn more about WLC configurations using packet tracer. I know Packet tracer is very limited for this kind of exercise, but I just want the basic, so it's enough. Here is the network: ...
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2answers
44 views

positively identify remote devices on network

From time to time looking at network logs i see strange devices on the network. I will nmap them and get "tcwrapped" tcp ports 2000 & 5060 these are indicative of a voip device. The logs indicate ...
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2answers
65 views

Can a LoRa signal pass through human bodies?

If I want to transfer a packet of data from one LoRa to another up to 1km away, if there's a crowd of people will the signal not get through? If so is there an alternative to LoRa to transfer ...
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1answer
76 views

Securing VLANs for Wireless AP with multiple SSIDs

I'm deploying Wireless Access Points with two SSIDs: employee (VLAN 45) and guests (VLAN 46). I'm confused how I should configure the Ethernet port on the APs and switch. My preference would be to ...
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1answer
39 views

How using a wider channel in wireless medium doubles the data rate?

I am quite confused about how increasing channel width in 802.11 Wireless Networks leads to doubling the data rate. And If that's the case why don't we use 160 MHz wide channel in 5 GHz band?
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0answers
29 views

MAC address not found in BSSID List

I'm trying to connect my device to a router but it fails. While debugging, I found this error message in the logs "MAC address not found in BSSID List" What does it mean? I know that the BSSID is ...
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0answers
30 views

Do encryption and DSSS chipping do fundamentally the same thing?

(the below is all as I understand it, so I may have made some mistakes, if so I apologize and would like to be corrected) In encryption a keystream is XOR'd with data to encrypt it. The keystream is ...
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0answers
37 views

Cisco Wireless LAN controller serving to different network

I am working on a design to get Cisco access points on a network(Network B)to join a Cisco wireless LAN controller on a separate network(Network A). The planned design is to have the WLC management ...
1
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1answer
42 views

Is there a way to detect 802.11 devices “pass by” an wifi hotspot?

Is there a way to detect 802.11 devices "pass by" an wifi hotspot. Like if an mobile user there do not connect to the wifi, But has walking by the wifi hotspot.
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0answers
30 views

W-iFi MIMO - Optimized for throughput or Receiver sensitivity (diversity)

How does a Wi-Fi MIMO operation on a smartphone select between maximizing for WiFi throughput or optimized for receiver sensitivity (range)? Is this determined by a configuration in a Wi-Fi MIMO ...
0
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1answer
39 views

Wireless Router Multihoming?

Here's the scenario: One outdoor equipment cabinet with seven different 100 Mbps carrier feeds Currently, no trailers are wired. The point of this is to avoid running cable to each trailer Seven ...
1
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1answer
23 views

Rogue Wireless Scanning

Is Rogue Wireless scanning required for a "wired" network? The organization does not have a wireless environment. I am just curious the reasons behind conducting the scan and what is the risk if the ...
3
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1answer
69 views

What does “convergence” mean in context of mesh networking protocols?

I am reading about mesh networking protocols like BATMAN and OLSR, and I keep coming across the term "convergence". For instance, in this page from the BATMAN docs, there is a section called "...
0
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1answer
68 views

IP Networks Issue

I've been facing this issue for quite a long time now, and couldn't figure out its logic. So let me explain what I have: I have Xampp installed on a Linux Desktop PC which is connected to two local ...
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2answers
89 views

How can wind affect my Wi Fi signal?

I live next to a university campus. Sometimes I get a nice strong Wi Fi signal. Sometimes I don't get anything. It all depends on the wind direction. How is it possible for wind to affect electro ...
1
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1answer
37 views

Initial connection to WI-FI

My question is what is happening during the initial connection to a wireless network , is there an Ethernet connection first and then DHCP or something else is happening before the device receive an ...
3
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1answer
71 views

Does the theoretical limit of 54 Mbps apply to any WiFi protocol limited to 20 MHz wide channel, even on a 5 Ghz channel?

I'm wondering if I limit my channel width on a really nice (Meraki WAPs capable of 802.11ac) WAPs, to 20 MHz to stop them from overlapping, or if the Auto Width channel setting is making that change. ...
2
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1answer
60 views

The difference between routing and path selection

I am having difficulty in understanding the difference between the routing and path selection. I am working on IEEE 802.11s-based mesh networks and reading about the default routing protocol HWMP. In ...
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0answers
20 views

Wireless VoIP traffic collisions

I have been rolling out an all wireless office at one of my company's offices, and when I say all wireless, I mean all wireless. Desktops, laptops and desk phones all use wireless to connect. Maybe ...
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1answer
52 views

What type of IEEE 802.11 standard (a, b, g, n, ac….) implemented in today's smartphones? [closed]

IEEE 802.11 standard has several versions as a, b, g, n, ac... etc; since which standard is accommodated for smartphone's wifi feature?
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2answers
439 views

Decoding wpa-psk traffic with Wireshark

I want to plot how much data each client is using from a wpa-psk protected access point (that I control). For that I intend to monitor all traffic for a couple of days. However I can't decode the TCP ...