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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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Usb Wireless Adapter wrong ip address [on hold]

I am Using Fedora (fc25.x86_64) . The Wireless adapter (MT7601U Wireless Adapter 802.11n) connects to the Wireless WiFi successfully but no internet connection is got. I noticed that the wireless ...
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8 views

Is it possible to force a device to sign onto the 2.4g network band with band steering turned on? [on hold]

For context, I'm a tech support agent for ISP customers. The reason I am asking is usually band steering is turned on with the wireless gateways I work with. I have many customers that call that can't ...
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16 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 ...
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Need to encrypt IP cameras over LAN [on hold]

I tried googling everywhere, but got no help with what I needed specifically. Let's say I have several IP cameras on a local area network. This LAN will NOT be connected to the Internet. The IP ...
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1answer
33 views

ISP provides vlan but cannot get internet from behind second router/switch [closed]

I am not an network specialist but still trying to understand what is happening in my network. My ISP provides a router (Zyxel vmg8324-b10a) which is connected to the glas fiber modem (Genexis). ...
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1answer
62 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-...
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0answers
19 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 ...
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1answer
37 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 ...
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1answer
25 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 ...
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2answers
217 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 ...
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2answers
41 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,...
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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 ...
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22 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 ...
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1answer
63 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 ...
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1answer
91 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
49 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
465 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
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 ...
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1answer
90 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?
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1answer
78 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 ...
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1answer
42 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 ...
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3answers
58 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 ...
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1answer
19 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 ...
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2answers
87 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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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 ...
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2answers
131 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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1answer
37 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
236 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 ...
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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 ...
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1answer
56 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. ...
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2answers
396 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
201 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
25 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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5answers
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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
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 ...
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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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3answers
2k 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
319 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
25 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
133 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
129 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
127 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 ...
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1answer
83 views

Why wait DIFS time before sending in CSMA/CA?

Why wait DIFS time before sending in CSMA/CA
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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 ...
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2answers
73 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
281 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
44 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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1answer
49 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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1answer
50 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 ...
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1answer
30 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 ...