Stack Exchange Network

Stack Exchange network consists of 175 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 [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.

-1
votes
1answer
33 views

How cellular networks gets internet? [on hold]

Mobiles get internet but how? From the towers, we used to get signals and communicate with others like calling or a message but coming to the internet how in the terms of networking terms like radio ...
0
votes
1answer
19 views

How should DHCP servers respond to subsequent requests from same MAC address? [closed]

I'm handling a wireless router device (Asus RT-AC66U) that advertises a so-called Repeater Mode. This mode allegedly picks up an existing WiFi signal and repeats it, while it disables DHCP and NAT ...
-1
votes
0answers
12 views

Secondary router used as access point has extremely low speed [closed]

I have had a spare BT Homehub 4 set up as an access point connected LAN-LAN via power line adaptor for boosting signal in my house. The main router is an ASUS DSL-AC68U. I receive download speed of ...
0
votes
0answers
28 views

Will LoRa work from Earth To Stratosphere?

I'm unsure if this is the most suitable exchange however I thought it seemed most fitting personally, please correct me if im wrong. I was wondering if LoRa would work to transmit GPS data from my ...
1
vote
0answers
24 views

What is the difference between Power control and Power allocation?

In the context of wireless communication (specifically device-to-device communication) what is the difference between Power control and Power allocation. I guess the latter is a form of resource ...
2
votes
1answer
27 views

RV260W as Access Point

We recently upgraded to a proper firewall, with some help from this community, and are now looking to repurpose our RV260w as a wireless access point. I tried already, but I was trying to use the WAN ...
3
votes
1answer
67 views

Effect of physical travel on wireless connectivity [closed]

Given a stationary wireless router and a wireless device traveling from point A to B--passing directly by the router along the path--is there a speed at which the wireless device could travel to cause ...
2
votes
0answers
49 views

RPL: questions on routing mechanism

I'm studying RPL and two questions came to my mind: 1: Both in storing and non-storing modes, if a node wants to send a packet to another node via P2P communication paradigm, then how does the ...
0
votes
1answer
41 views

Routing in Wireless Ad-Hoc Networks

Let's say I have a mesh of sensors forming a wireless ad-hoc network. If one sensor wants to send data to the sink, it will transmit a packet via WiFi for example. My assumption is that there's no ...
0
votes
0answers
28 views

AIR-AP1832I-E-K9C no CiscoAirProvision SSID is showing?

Just trying to setup a AIR-AP1832I-E-K9C but no CiscoAirProvision SSID is showing? Anyone know what to try as the Mobility Express manual only has 4 steps and I have done them all and can't go any ...
3
votes
1answer
69 views

Does IEEE 802.11 allow soft-combining?

Out of purely theoretical curiosity, I was wondering whether the IEEE specification for WIFI allows for ARQ with soft-combining. I found a number of publications describing the benefits of soft-...
2
votes
0answers
37 views

Ad hoc vs Mesh, which one to use?

Say we have four nodes (A, B, C, D) that are arranged in a chain-like topology. A <-------> B <-------> C <-------> D Only the adjacent nodes are in range of one another (A can ...
0
votes
1answer
39 views

What does a LoRa Gateway actually do?

I have tried researching this question but I'm not quite fully understanding the benefits or true reasoning for having a Gateway. If you have two LoRa RA-02 modules they can communicate with each ...
2
votes
1answer
35 views

Wireless Controller 5520 Creating a dynamic interface

I'm hoping to determine the least intrusive way to configuring my WLC. I am working through the GUI interface and have created a new dynamic interface [Controller-> Interfaces] When I went to ...
2
votes
2answers
407 views

Cisco 899G-LTE Cellular 0 interface in spoofing mode

I have a problem. After I've reseted my router configuration it doesn't get IP from LTE SIM card. Seems like my celullar0 interface is in spoofing mode. > Router#show interfaces cellular 0 ...
0
votes
2answers
47 views

Make devices visible under Access Point

In our network, all wired PCs have a direct access to internet (83.XX.XX.XX) and a secondary IP address on the same NIC in order to access a subnetwork (192.168.10.XX) with wired peripherals (scanners,...
0
votes
1answer
23 views

WAP power profile?

Context The company I work for provides for its workers an ethernet and, for temporary visitors, a limited bandwidth/time wifi. There is a new trend in France: Wifi and RF are the devil. Question ...
-1
votes
0answers
76 views

Calculation of Traffic Channels per Cell in GSM

I have a query with respect to this question. It is from the book titled "Wireless Communications and Networking" by Vijay Garg. More specifically, my uncertainty is with regards to the part circled ...
0
votes
1answer
85 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 ...
6
votes
1answer
134 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 ...
1
vote
2answers
63 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.
1
vote
4answers
482 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: ...
1
vote
1answer
53 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
votes
1answer
138 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
votes
1answer
100 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
votes
1answer
43 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
vote
3answers
60 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
votes
1answer
21 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
votes
2answers
120 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 ...
5
votes
2answers
29 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 ...
3
votes
2answers
142 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
39 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
votes
3answers
387 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
votes
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
vote
1answer
57 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. ...
7
votes
2answers
405 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
278 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
vote
0answers
30 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 ...
13
votes
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
vote
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
41 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 ...
3
votes
3answers
3k 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
votes
1answer
536 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
vote
1answer
32 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
votes
1answer
165 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
168 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 ...
1
vote
2answers
187 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
114 views

Why wait DIFS time before sending in CSMA/CA?

Why wait DIFS time before sending in CSMA/CA
2
votes
2answers
53 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
votes
2answers
78 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 ...