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Questions tagged [wireless]

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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1answer
37 views

will wireless devices' MAC address be saved on layer 2 switch?

So I know that basically switches work like this (assuming 2 PCs are connected via Ethernet port) - the switch will store the mapping of the 2 PCs' MAC address and the switch ports in which they ...
0
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0answers
9 views

Can't see network printer after switching from standard wireless access points to Linksys Velop Dual band system [closed]

I have included a link to a Word doc with the details of the before and after installation below. https://www.dropbox.com/l/scl/AADGiu_4QvODYeCh5JlwGq6sfduPywPvUMY When you try and print to the ...
4
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1answer
64 views

Why do we have authentication before association in 802.11

Why does client authenticate before associating with the AP. What does open system authentication even achieve. I fail get an accurate reason from my web searches. Best reason I do get is unlike wired ...
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2answers
43 views

What is the purpose of 802.11 authentication?

Why does client authenticate before associating with the AP. What does open system authentication even achieve. I fail get an accurate reason from my web searches.
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4answers
455 views

Are “ad-hoc” networks always wireless?

We see that almost always the term of "ad-hoc networks" comes with WSN (Wireless Sensor Network). Does it mean an ad-hoc network must be always wireless? If we define an ad-hoc network as follows: ...
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1answer
52 views

Conversion of WLAN traffic to the outside world

Preamble: I don't have that much experience with lower level computer networking yet. I am currently trying to wrap my head around the workings of the WLAN protocol. While I am starting to get the ...
2
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1answer
42 views

Is it possible to use 802.11n to send multicast?

I have tried to set the wifi multicast rates and find that all the multicast packets are send by 80211g, so that the max rate is 54M. Can I use the 80211n to achieve higher rate?
3
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1answer
57 views

Need help/advice on basic network setup involving security cameras, guest access, and VLANs

At some point, I'd like to move from a single, flat, network to having a more secure network using VLANs. I have an idea of what I would want, I just don't fully understand some details of Native ...
0
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1answer
41 views

How is it possible to communicate between two antenas supporting 20km and 5km distance at 5GHz frequency?

Is it possible to link two antennas supporting different distances 20km and 5km in full duplex mode? If Antenna A such as Ubiquiti Rocket can support 20km distance using 5GHz frequency and Antenna B ...
1
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3answers
52 views

Do throughput rates include corrupt packets? Is throughput = packet loss + good packets or is throughput = good packets?

Normally network devices/software show some kind of current throughput. For example my home router shows the throughput for each connected device in its web interface. Or every web browser when ...
0
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1answer
16 views

Decentralized instance communication [closed]

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 ...
2
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2answers
54 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 ...
4
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2answers
28 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 ...
2
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2answers
104 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? ...
3
votes
1answer
31 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 ...
4
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3answers
103 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 ...
4
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2answers
66 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 ...
1
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1answer
51 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
379 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 ...
3
votes
2answers
118 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 ...
1
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0answers
23 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 ...
12
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5answers
5k 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 ...
1
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0answers
21 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 ...
1
vote
1answer
39 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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2answers
1k 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 ...
2
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1answer
141 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 ...
1
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1answer
20 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 ...
2
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1answer
80 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?
2
votes
2answers
93 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 ...
0
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2answers
93 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 ...
1
vote
1answer
57 views

Why wait DIFS time before sending in CSMA/CA?

Why wait DIFS time before sending in CSMA/CA
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0answers
524 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: ...
2
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2answers
47 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 ...
2
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2answers
69 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 ...
1
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1answer
189 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 ...
1
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1answer
43 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
35 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 ...
0
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0answers
33 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 ...
2
votes
1answer
47 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.
0
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0answers
31 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 ...
1
vote
1answer
44 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
27 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
votes
1answer
109 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 "...
1
vote
1answer
71 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 ...
1
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2answers
104 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
44 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
79 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
65 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
23 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 ...
-3
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1answer
65 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?