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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13 views

Possible to denylist individual WiFi AP device, but not SSID? [closed]

In a situation where a network of WiFi access points all serve the same SSID, is there a mechanism to configure WiFi client devices to connect to the SSID but ignore an individual AP? Specifically, I'...
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32 views

Loop detection in Extreme switch

I am facing problem since a month in my wireless network. I have extreme switch in my office and with switchport 22 i have given to backhaul with wireless vlan to it, the problem is that my switchport ...
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80 views

pFsense, Unifi AP, HP switch and VLANS

I have a Unifi AP with a single MYNET SSID connected to my HP 2520 switch on port 23. I have a pfSense LAN interface connected on port 1. AP clients get DHCP (192.168.1.0/24) from pfSense and can ...
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25 views

In wireless networks, how do Service Sets and Basic Service Sets relate to each other, if they do?

I am beginning to learn about networks and wireless networks, specifically, and am having trouble grasping how do Service Sets and Basic Service Sets relate to each other, if they do. Are Basic ...
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93 views

How to configure IP addresses in cisco packet tracer?

Hello I am working with Cisco packet tracer. I have two laptops connected to a wireless router with IP addresses assigned using DHCP. The router's Internet IP address is 10.1.0.0 and the LAN address ...
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1answer
105 views

How select and implement proper wireless security mechanism?

I am having issue regarding wireless security Mechanisms. WEP, WPA and WPA2 TKIP,EAP, LEAP, PEAP, EAP-TLS, EAP-TTLS and CCMP How do we implement these security mechanism effectively on ...
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10 views

Where does the 4way handshake fit in with the 802.11 Authentication Frame

In an open network you have the authentication frame on just the 802.11 level: but if the network has WEP or WPA(2/3) there will also be a four way handshake: My question is, where does the 4 way ...
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1answer
32 views

When a phone sends a series of zeros over radio waves to a cell tower, how does the tower know how many in a row it is?

So if a 1 is represented by 100 MHz and 0 is 50 MHz, 101 would be 100 50 100. But if the phone sent let’s say 5 zeros in a row, how can the cell tower know if it was one zero or 3 or 5 or 7 since they’...
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28 views

1941W wireless clients losing DHCP IP address [closed]

I am attempting to 'extend' a 192.168.1.0\24 network with an experimental network 192.168.10.0\24 using a 1941W router. I have configured 1941W to distribute a 192.168.10.0\24 network, with WLAN ...
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38 views

How does the network client pick a wifi signal, given two available frequencies?

This might be basic, but I don't know the answer... Given a router and a client, both having 2.4G (slower, more range) and 5.XG (faster, less range) frequency radios (and both named with the same SSID ...
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1answer
18 views

Mesh network 802.11d vs adhoc

What is the difference between 802.11s and adhoc? Is it compulsory to have same channel for wireless mesh node or it can have created using different channels where neighbouring nodes on on 2 non ...
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21 views

Different APs can be assign gateway from different brand

Edge-core EWS101 can be assign as gateway for EnGenius ENS202 APs ? Different brands will be work as gateway for wireless controller ?
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2answers
45 views

How Access points differentiate stations?

I'm doing a ping from a station to another connected on the same access point. Given the fact that they are both on Wi-fi interface, how can access point know where to forward a packet?
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24 views

DHCP is not assigning IP addresses to clients on the other side of a Light Weight Access Point in Packet Tracer

This is me explaining what I'm doing/conceptualizing my thinking. a tl;dr is at the bottom for the main problem I'm facing. I need to use packet tracer though as a requirement (it's a class project) ...
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1answer
315 views

Alternatives to 802.11* wireless bridge?

Every now and then the question arises for me to link two Ethernet segments over some kind of outdoor wireless connection. It is usually over comparatively short distances (at some places maybe some ...
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21 views

Can I use a wireless access point (or two) to extend my existing wireless network? [closed]

In large commercial buildings I typically see several ceiling mounted Wireless Access Points. When moving throughout the building, I do not have to continually reconnect to different networks (or ...
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22 views

What are the good hardware, software and equipment's suggestions to set up a wireless infrastructure? [closed]

I am working on providing wireless infrastructure suggestions to a client like what software, hardware and equipment will be required to a client in order for them to set up the wireless ...
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1answer
66 views

How is a video calls bandwidth reserved on a wifi network?

All the older versions of Wifi, except for Wifi-6, give each device on the network the entire bandwidth /highway no matter how small the amount of data it needs to transfer. Can someone explain how ...
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2answers
154 views

How are different phone/GSM operators connected with each other?

This might be a noob question, but I am having trouble finding an answer to it. Let’s say I am a new GSM operator. How would I go about connecting my network and my subscribers to the rest of the ...
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1answer
40 views

How can i set up a Wireless LAN to serve 20,000 concurrent devices [closed]

How can i setup a wireless LAN that can serve up to 20,000 concurrent devices. I am having a problem in figuring out if i need one router or several routers. A topology diagram with explanation would ...
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1answer
172 views

Some mobile clients are unable to connect to UniFi AP mysteriously

We have two UniFi Controllers, one contains the main internet its directly connected to the fibre and then we give internet to the second controller using LAN connection, internet works fine in main ...
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1answer
35 views

How a wifi AP handle packets

Computers are connected to a wifi AP. The wifi AP is connected to a L2 switch. A server is also conected to this switch. When computers sends packets to the server, how the wifi AP manages the paquets?...
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1answer
66 views

Does tcpdump work differently from Omnipeek?

I have been trying to analyze packets using tcpdump. I am trying to use a wireless card and capture packets through monitor mode, instead of promiscuous mode, since I want to see what kind of traffic ...
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1answer
45 views

Routing between two sites using FTTC Broadband and E-Band Wireless

I have two sites, both with 80/20 FTTC broadband connections that terminate at the standard white box BT modem. The connections both have fixed IP. I’d like to connect these up to each other and form ...
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47 views

How does mesh network handles seamless roaming?

When extending a WMN to a city-wide scale one of the problem it faces is seamless handoff. So, do I need to implement one of the ticket based authentication for it to work seamlessly or will IEEE 802....
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1answer
34 views

Range of router and device in WiFi [closed]

Is range of the wifi network depend on Router only? Or does it depend on the connection device also? I believe that the device need to transmit packet to router, so the range till which the device can ...
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1answer
316 views

Do mobile phones continuously broadcast their IMEI number so that cell towers can find them?

Edward Snowden said that in an interview. Is it exactly true? Does it have to do with SSN (sim serial number)? Is the SSN broadcasted with encryption and modulation done to it or is the IMEI number?
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20 views

Zigbee authentication protocol [closed]

I'm writing a Thesis on IoT networks and authentication protocols, I've found this technology called Zigbee that seems to be really interesting but i can't find anything about which authentication ...
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3answers
110 views

Have we failed a wireless survey for something that couldnt have been offered?

On a large campus wireless network (approx. 500 APs, 4-5000 connected devices) we have been asked to create an SSID for some specific equipment that can only work on the 2.4Ghz range. No problems with ...
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2answers
50 views

Reconciling multiple definitions of Bandwidth

I am confused about the meaning of the term 'Bandwidth' in a wireless transmission environment. The two most common definitions I could find are: difference between the upper and lower frequencies in ...
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1answer
49 views

What kind of devices can be used to connect fiber optic segments via radio?

Say you want to connect building A to building B through a fiber optic cable, but at a given point, you are required to use a wireless connection (short range such as 10/20mt, where antennas are in ...
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1answer
76 views

Is MIMO equivalent to link aggregation?

Is MIMO the wireless version of link aggregation in wired networks? I'm not asking if MIMO is a similar link aggregation protocol like LACP or PAgP, what I'm asking is if it is the same concept as ...
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1answer
129 views

Cisco packer tracer training - exercise 2.1.1.5 [closed]

I’m currently starting Cisco and using the packet tracer course, but I’m having an issue with a section creating a simply topology. Everything good apart from one thing which is from wireless router ...
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1answer
91 views

How to connect two routers to the same network via an F-connector? [closed]

To clarify the situation, my ISP gave me a Cisco EPC3928S router which has F-connector input like shown in the picture below. On the second floor they set an additional coax cable for the television. ...
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1answer
50 views

How does SISO and SU-MIMO serve multiple clients?

I am new to wireless. From what I read, SISO serves only 1 client at a time and SU-MIMO can serve multiple clients but at different times. So does SISO and SU-MIMO serve 1 client and then wait until ...
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2answers
72 views

Is there packet loss in WLAN?

What happens if 2 end devices connect to the same AP and they wanted to exchange data (without connecting to the internet), but 1 device has a strong signal and the other has a weak signal? Is there ...
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1answer
26 views

Does the Duration Field in 802.11 Depend on SNR

I am trying to understand the behavior of the Duration/ID field in 802.11 specs. Its role and behavior are outlined in the standard. This field tells other stations how long the transmitter is going ...
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29 views

What should I be looking out for in a wireless router to support a large number of users?

I hope this is the correct place to ask this. I was placed in charge of the network of a small business. Previously, the number of wireless devices connected to the wireless router was under 20, and ...
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1answer
88 views

Trying to setup 5Gbps setup with APC and AP

I currently have a 5Gbps line being provided and want to set up an Access Point Controller (WEC-8050) with Access Points (WEA512i) and Cisco Catalyst 2960-x 48 port, is this possible? The APC and ...
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3answers
2k views

How to find the client who downloads a big file?

today I found out that somebody in our organization utilized our uplink for 100%. We have Cisco WLC 2500 where I could see in application monitoring that 80% traffic of the last 90 sec was a file ...
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0answers
41 views

How does direct sequence n-bit chipping code recover bit in the event of interference?

Say for example my data stream was 1010.Using 4-bit chipping code, with a random sequence of 0100101101011001. The XOR'd data which the receiver receives is 1011101110101001. I understand that ...
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1answer
314 views

Is WIFI like a hub, switch or router?

A wireless router; the wireless part of it, is that a layer 2 or layer 3 device? I have heard that a WiFi router is just a wired router with a built-in wireless AP, and since a wireless AP functions ...
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3answers
84 views

Point to point link with two Internet connections

Thank you in advance for reading this question. I have two buildings, let's say A and B, each connected to the Internet. Devices in A also need to access devices in B and vice-versa. The Internet ...
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0answers
51 views

How can I consider the noise from my neighbor in V2X? [closed]

I'm working in v2x and I'm trying to calculate the date rate for specific vehicles in the road. How can I consider the other neighbor's vehicle's interference when calculating the date rate for my ...
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0answers
108 views

Cisco Prime: Accurate Wi-Fi association history?

I'm running Prime 3.7 with a 2504 WLC (8.5.151.0) and am finding that the client association history under Monitor -> Clients and Users -> [select a client] does not show associations that last less ...
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1answer
45 views

How do hosts filter broadcast signals in wireless network?

In bus/hub network, hosts check the destination address of every broadcasted packet they receive and accept it if they are the destination, otherwise they ignore it. Do we use the same principle in ...
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1answer
920 views

Lightweight AP won't join with Wireless Lan Controller

I'm trying to set up a wireless network, and learn at the same time. I'm using a Cisco 5508 WLC and a AIR-CAP3702I-A-K9 lightweight AP. The problem I'm having is that the LAP won't joing with the WLC. ...
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1answer
48 views

How a wireless access point reads all the available SSIDs

When a wireless access point is broadcasting its SSID (beacon frame) I assume it sends it on specific selected channel (channel 1-14 for 2.4 GHz network). But how do all the other access point ...
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2answers
782 views

Can I set up a WLAN with a WAP but without Internet?

I was able to set up a LAN with the following configuration : A main computer (Windows PC) with a DHCP and DNS server, who is configured to have a static IP address Three devices (embedded Linux) ...
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0answers
55 views

Does Wireshark capture all Wi-Fi traffic under the same access point even with WPA encryption?

I know that free unencrypted-Wi-Fi is dangerous since all the traffic in the same AP is visible. Does Wireshark capture all Wi-Fi traffic under the same access point even with WPA encryption?

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