8 votes
Accepted

Are "ad-hoc" networks always wireless?

Caveat: This question might raise primarily opinion-based answers, and might be put on hold or considered off-topic, for exactly that reason. Still, I dare to attempt an answer: Following https://...
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8 votes
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Raw-Ethernet Frames

First, Wi-Fi (IEEE 802.11) is not ethernet (IEEE 802.3) any more than token ring (IEEE 802.5) or any of the other IEEE LAN standards other than 802.3 are ethernet. The frame headers are different for ...
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  • 94k
7 votes

Raw-Ethernet Frames

Based on your questions and comments, I think you are missing the point of the two articles you are referencing. When they are talking about "Raw Ethernet," they are talking about data frames that do ...
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5 votes

WSN vs Ad hoc in real practice

Just so we're clear on terminology, in the 802.11 spec, Ad-Hoc is a mode of operation of the wireless client interface - this allows direct connectivity between two (or more) wireless stations that ...
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4 votes
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Do wireless devices such as smartphones transmit beacon equivalent frames such as APs do?

Do wireless devices such as smartphones transmit beacon equivalent frames such as APs do? A wireless client does not transmit beacon frames. However if a device is configured to provide service (i.e. ...
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4 votes
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The difference between routing and path selection

Routing is considered a layer-3 function, using layer-3 (IPv4, IPv6, IPX, AppleTalk, etc.) addresses. Routing involves a path selection based on the layer-3 destination address. A router uses a ...
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  • 94k
3 votes

WSN vs Ad hoc in real practice

Wireless Sensor Network (WSN) and Ad hoc Network differ in one important factor: Infrastructure-based vs Infrastructure-less. In WSN, network is managed by a base station such as these antenna around ...
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3 votes

Rogue Wireless Scanning

This is one of those "it depends" questions. It depends on How much of a risk rogue APs are to the organization. How well you can detect unknown devices being connected to the network. Only you ...
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3 votes
Accepted

What does "convergence" mean in context of mesh networking protocols?

Routing convergence means that all the routers have received all routing updates and have updated their routing tables to reflect the changes. Different routing protocols propagate routing changes in ...
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  • 94k
3 votes

Are "ad-hoc" networks always wireless?

As the already present answer point out, ad hoc is a matter of perspective. From a user's POV an ad-hoc network should be effortless and require no planning. If this precludes bringing along a cable, ...
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3 votes

What is the difference between 'clock synchronization' and 'time synchronization'?

At least in the context of network devices clock synchronization tends to refer to synchronous circuits where a constant time signal has to be maintained so that two devices can know the precise rate ...
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  • 6,036
3 votes

Do wireless devices such as smartphones transmit beacon equivalent frames such as APs do?

802.11 specifies clients listen for AP beacons. They don't broadcast anything. However, real world implementations (Windows, iOS, etc.) actively hunt for known SSIDs when they aren't associated. ...
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3 votes
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Difference between ad-hoc and wifi hotspots

Wi-Fi has two working modes - IBSS (ad-hoc) and BSS (infrastructure mode). The main difference between these two modes is access-point. This kind of device is available only in infrastructure mode. ...
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2 votes

What is the difference between source and destination sequence number in AODV?

According to my understanding, they are two different entities. They are completely independent of each other. A node's sequence number gets incremented either when it broadcasts a RREQ packet or when ...
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2 votes

Bonjour defeating wireless isolation?

I think SSID isolation is not the same as Client Isolation. Some controllers will have both and I believe they perform two different tasks. With SSID isolation, it simply means that if you have ...
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  • 1,996
2 votes

Destination address in a probe request in an 802.11 Ad Hoc network?

1.) The Microchip wifi Beacon announces the network, I assume the BSSID is randomly assigned in IBSS / Ad Hoc mode. To some degree, this is true. For clarity, from IEEE-802.11-2012 section 10.1.4.1: ...
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2 votes

Udp broadcasting for communicate with a device who has the same IP address , is it possible?

There are a couple of issues here. 1) I'm not sure of all IP network stacks, but often the driver will drop packets it perceived to be sent by itself. This can often be got round with listening for ...
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2 votes

Are "ad-hoc" networks always wireless?

About the term The term "Ad Hoc" seems to have completely different meanings in different contexts. In wireless LAN context "Ad Hoc" means that all devices in the network have the same role. The ...
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1 vote
Accepted

Mesh network 802.11d vs adhoc

The major difference is that in a mesh network, nodes forward between other nodes. In a simple ad-hoc network, nodes must see each other to communicate. In either network, a node can use multiple ...
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  • 71.5k
1 vote

Routing in Wireless Ad-Hoc Networks

Yes your assumption is correct when traditional routing is used(proactive routing). If you used traditional routing, it create routing table before packet is sent. Maintenance of routing tables ...
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  • 3,078
1 vote
Accepted

RTS threshold set to 0

(Edited) Sorry. I meant the following: If you set the RTS value to 0 then the behavior is implementation based. Some vendors might have a "disable RTS" concept, and other might have "always enable ...
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  • 56
1 vote

AODV routing accidentally gives two nodes the same IP address

Routing protocols, including AODV, do not assign IP addresses. That is handled by other means (DHCP for example). Two hosts with the same IP address is an error condition, so that should not happen ...
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  • 63k
1 vote

Is it possible for secure third-party peering at wireless access points?

If your home wap has vlan capability you can create two SSID's. Assign each SSID to a vlan. Then, assign ACLS (access control lists) to allow them to get to the Internet but block them from your ...
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  • 918
1 vote

Features of Windows Ad-hoc Network

The wikipedia description is wrong. In an ad-hoc network, nodes communicate directly. What they are describing is a wireless mesh network (aka: 802.11s). Also, your understanding of ad-hoc is flawed. ...
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  • 29.7k
1 vote

Raw-Ethernet Frames

I would like to do a similar test but in a wireless environment. Look at Wifibroadcast (Linux, some Android support) which does exactly that. Short summary: it uses a pair of wifi adapters, one in ...
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1 vote

In OLSR instead of MS if MPR selector are used, will it work?

It's impossible to answer your question because there are some assumptions wrong in it. First, in OLSR not all nodes generate TC messages. Only nodes that have been selected as a MPR generate and ...
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  • 1,289
1 vote

OLSR mobile routing protocol

A TC (Topology Control) message sent by a node x contains a list of all symmetric neighbors of the node x, not just the nodes that have selected x as a MPR. So your question contains a wrong ...
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