Stack Exchange Network

Stack Exchange network consists of 174 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Visit Stack Exchange

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.

0
votes
0answers
13 views

WLAN not connecting to internet on laptop but works with mobile [on hold]

I have installed a WLAN router, which works out of the box, connecting to the internet and was able to access the internet through Wifi over the mobile phone. When connecting to the WLAN from the ...
1
vote
1answer
49 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 ...
0
votes
0answers
12 views

Playing Online Games and Downloading At the same time in background [on hold]

There is always a time in our life when we need to download something urgently and also wanna play some online games without any ping issues at all, So I was thinking is there a multi-channel kind of ...
0
votes
1answer
25 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?
0
votes
0answers
10 views

How do find out how many devices near me have wifi enabled? [closed]

Would it be possible to know how many devices within my hearing range have wifi-enabled? From what I know 2.4GHz Wi-FI has 13 channels available, so I would need to listen to all of them in order to ...
0
votes
0answers
8 views

broadcast from ethernet port and receive data packet in the local network of a wifi router [closed]

I have an ethernet switch that provides a number of ethernet connections in my lab. Each port is assigned with static ip. One of the ports is connected to a wifi router another port with a PC. Then, I ...
0
votes
0answers
16 views

what is the relationship between CIR and RSS?

Can we calculate the RSS from the CIR? I wonder if the RSS is the sum of the squares of the CIR components? thanks.
2
votes
2answers
46 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 ...
2
votes
2answers
94 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? ...
1
vote
1answer
27 views

Why do I see “ethernet” keyword in my wlan0? [closed]

When I check my wireless network card interface with the command ifconfig wlan0: ether -my-mac-adress- (Ethernet) I just started to learn this stuff, but I thought Wifi and Ethernet are kind of ...
4
votes
3answers
60 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 ...
5
votes
1answer
53 views

DCF and PCF in Wifi-networks

I am studying, trying to learn how DCF (Distributed Coordination Function) and PCF (Point Coordination Function) works as access methods in WiFi, and how they relate to infrastructure vs ad hoc ...
2
votes
1answer
34 views

Why isn't there packet loss when WiFi scan during packet transmitting?

Android devices perform periodical (about 10s as period) WiFi scanning in the background. Let's say there is a Infrastructure BSS with 2 stations connected, one of the stations, staA, is a Android ...
4
votes
2answers
63 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 ...
0
votes
1answer
43 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
votes
2answers
366 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
80 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
votes
1answer
35 views

If I disable the 5GHz radio on my router will it improve my 2.4GHz performance or range? [closed]

I am having an ASUS RT-AC53 dual-band router having 3 antennas. Currently, it is emitting both the 2.4GHz and 5GHz wifi radios. I am just curious if I disable the 5GHz radio will it anyway improve the ...
0
votes
0answers
83 views

Intra-VLAN communication between wired and wireless devices

I am trying to get a very simple VLAN with WIFI network experiment up. I have been searching online (including on this site) for sometime hoping to find an experiment similar to mine. However, most ...
0
votes
1answer
40 views

Dependency between IEEE 802 and OSI model [duplicate]

My question is focussed on IEEE 802.11x for (WLAN) and 802.15.1 (Bluetooth) Wikipedia and other sources underline, that the mentioned IEEE standards just define the PHY and MAC layer from the OSI ...
0
votes
3answers
45 views

2x WiFi APs, trying to tune them to work together whilst maintaining throughput

I know very little about WiFi. I know how to measure throughput, I know that 2.4GHz tends to be slower than 5GHz but has a further range. So here's my scenario. I have an office with 1x Aruba IAP-...
0
votes
2answers
109 views

Accessing Internet without WIFI or Ethernet

Theoretically, is it possible to access the internet through a browser without connecting to an ethernet cable or using WIFI?
12
votes
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 ...
2
votes
2answers
70 views

Why can't I get a WiFi password by sending out the same SSID?

If I have two WiFi routers in different locations but with the same SSIDs and I connect a device to one of them, when I bring this device near the location of the other router, it will automatically ...
-1
votes
1answer
30 views

Signal Strength and Distance

I will be very thankful if you could clarify something to me. Assume I am standing at point A and scanning WiFi around me. My phone records an access point X with a signal strength, let's say -50 ...
0
votes
1answer
36 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 ...
1
vote
1answer
92 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 ...
0
votes
1answer
50 views

Forcefully wake a sleeping WiFi station - Possible?

As the title suggests... Most WiFi stations enter a sleep/doze state following a short period of inactivity. Is it possible to wake or elicit a response from a device in this state at will by ...
1
vote
1answer
57 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?
1
vote
0answers
65 views

Why is RTS/CTS optional for IEEE 802.11?

In wikipedia it is stated: Request to Send (RTS) frame: The RTS and CTS frames provide an optional collision reduction scheme for access points with hidden stations. A station sends a RTS frame as ...
1
vote
2answers
62 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
votes
1answer
48 views

Why wait DIFS time before sending in CSMA/CA?

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

What happens when either CTS packet or ACK packet gets lost

I have a question please regarding CSMA/CA with RTS/CTS. Say a station A sends a Request-To-Send (RTS) to a station B but A notices after a while that no Clear-To-Send (CTS) has been received from B. ...
1
vote
1answer
28 views

SNMP returns strange “bits sent/received” values on a particular port, why?

I have a HP V1910 Switch in my office. I have set up monitoring via SNMP on my local Zabbix server, and everything looks really good on almost all ports (for example, when I use iperf to test ...
0
votes
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?
0
votes
0answers
119 views

Wi-Fi airtime utilization

I am reffering to following article http://divdyn.com/wi-fi-throughput/ (paragraph 5). Can someone help me figure out how airtime saturation threshold of 45 Mbps for mix clients of 2/3 (1 SS) and 1/3 ...
1
vote
0answers
23 views

Information exposed by the wireless network card interface [closed]

In the 802.11 MAC, there are several parameters at the low-level such as the RTS/CTS threshold, Binary Backoff timers and NAV (Network Allocation Vector) timers to name a few. Is it possible for an ...
1
vote
0answers
13 views

Does this laptop support 5GHz wifi band [closed]

Does this laptop support 5 GHz wifi band? I googled it and I am confused as it shows both 802.11b and 802.11a. If it supports 5 GHz, why am I not getting it in available wifi connections? I have ...
0
votes
2answers
85 views

Is CSMA/CA used in Wifi technology?

I understand that these days CSMA/CD i.e. ethernet one isn't used at all because we have full duplex network. Thus, there is no chance of collision here. Also, we don't use hubs anymore. Each switch ...
0
votes
0answers
32 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 ...
1
vote
1answer
34 views

Maximum Transmission Unit 802.11ah

What is the MTU of the standard 802.11ah? I didn't find anything in literature and also on the original PDF standard.
1
vote
1answer
43 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
votes
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
votes
1answer
100 views

When does a node send its RTS frame after CTS?

CTS frame contains duration for sending of a node which requests it. And after the node sends the whole frame without collision, the AP broadcasts ACK frame. Then when does another node sends its RTS ...
2
votes
1answer
53 views

Understanding some internals of networking

Let's suppose that my computer is connected to WIFI and also computer of my collegue is connected to the same WIFI. Now, I change my IP address on WIFI interface (using ifconfig) to the same as my ...
3
votes
1answer
99 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
2answers
95 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
vote
1answer
121 views

Probe Request Channel Information

I have used wireshark to capture Wi-fi frames, and have configured my AP to operate on Channel 1. Now in one of the transactions that occur, I find my mobile device sending a probe request in the ...
3
votes
1answer
73 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
votes
1answer
62 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 ...