plz any body tell me about ad hoc network protocols security ?
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I presume you refer to the mobile ad-hoc network (MANET).\nMANET is a self-configuring network of mobile routers (and associated hosts) connected by wireless links—the union of which form an arbitrary topology. The routers are free to move randomly and organise themselves arbitrarily; thus, the network's wireless topology may change rapidly and unpredictably. Such a network may operate in a standalone fashion, or may be connected to the larger Internet. Minimal configuration and quick deployment make ad hoc networks suitable for emergency situations like natural or human-induced disasters, military conflicts, emergency medical situations etc.\n\nMANET is extremely vulnerable to malicious node presence and to certain types of attacks that can occur. To address these concerns, several secure routing protocols have been proposed recently: SAODV, Ariadne, SEAD, CSER , SRP, SAAR, BSAR, and SBRP.\n\nIf you are talking specifically about WiFi connections as it relates to "ad hoc" as opposed to "infrastructure". In the case of "infrastructure" WiFi network, there is a specific "hub" or access point (AP) is predefined to act as the central connecting point. In case of "ad hoc", the WiFi device can connect to any and all other WiFi systems at will.\n\nThere are advantages of ad hoc WiFi, but without pre-set and shared security the ad hoc infrastructure is exposed to anyone malicious or not to connect. By it's nature, ad hoc WiFi mode allows others to initiate connections to your system without much security.
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There is a ton of stuff that I found, but a good place to start appears to be the NIST:\nhttp://csrc.nist.gov/manet/index.html
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Check out this link and follow the suggestions.\nhttp://compnetworking.about.com/od/wirelesssecurity/tp/wifisecurity.htm
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you misunderstand something. it's precisely vice versa - you can "hack" resp. use the unsecure wireless network of your neighbor, but no one can use your secure network - period.
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usually the two types are referred to as Ad-hoc or Infrastructure.   \n\nAd-hoc wireless networks are peer-to-peer networks based on the various wireless computers on the network passing the information between themselves without the use of a router or access point.\n\nInfrastructure wireless networks use a router or access point to manage the connection.
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Security! \n\nSecurity should be a big part of any presentation concerning wireless connectivity.\n\nAdditionaly you could discuss its uses (RFID, networking, etc...)\nCost\nInfrastructure comparison to wired connectivity\nAccess
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Firmware updates are the best way of maintaining your router, they often will have updates to the firewall (if your has one) which is the backbone of the security within the router.  Also admin password changing is a good thing to stop any persons bypassing your security.  \n\nAs with all hardware a good blast of compressed air can help as well - dust will build up within the unit (causing heat)
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Ad hoc means "for a special purpose, case, or immediate reason."  For example, an ad hoc report is one put together on short notice to answer a very specific need, or an ad hoc committee is one put together on a temporary basis to solve a specific problem.  \n\n The phrase has been extended in computer technology to mean a network for a short-term network, such as one established with wireless technology for a short session ("I linked up through an ad hoc connection at the Starbucks")\n\nAd hoc literally means in Latin "for (or to) this."
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www.protocols.com is a good site for this kind of info. They are a little light on what happens to the ppp packet in pppoe, but the rest is there.
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Wireless Security exists. \nSecurity can be provided even in the wireless communication through proper encryption.
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http://www.tomsnetworking.com/\n\nGood source of information on networks
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First and foremost, you should probably secure your wireless network. WEP is not particularly secure, but will prevent at least casual intruders from gaining access to your network. WPA is a bit more secure. \n\n1. There is no easy way to figure out who is using your wireless network. if someone is using it, the computer will probably be close (300 ft), but if you are really interested, you will need something like a wireless packet sniffer installed to see what kind of traffic is flowing through your network\n\n2. An intruder will be able to see all of your information if do have not secured your network using something like WEP. These days most web sites use HTTPS to encrypt credit cards and passwords (which would mean that the intruder cannot see them), but you should still secure your network.\n\n3. Zone alarm will potentially protect you, but not if it is installed between your DSL / phone line and your wireless access point (remember that if the intruder can get into your wireless network, they can directly connect to your computer). There are a number of changes you can make to minimize the risk of somebody gaining access to your computer (e.g., if you are using windows, don't enable file sharing, make sure the latest patches are installed, etc.), but generally there are always some holes a determined intruder can use to get access to your data. Again, best way to prevent this is to enable wireless security....\n\nMore info:\n\n"Sorta liek creating a decoy unsecured network,tempting an intruder and then monitoring his tracks as to what he'll be upto wid such a network.Will i be able to gain the info of his computer username.So basically, does the intrusion work both ways wen i have created the network.? thanks again. cheers."\n\nYes, and this is called a 'honey trap' system (http://search.yahoo.com/search?p=honeytrap+security&prssweb=Search&ei=UTF-8&fr=ytff1-&x=wrt). Using a sniffer, you can try two things (based on his level of sophistication):\n\n1. watch what the intruder does, and hope that by passively observing the traffic, you get some insight about identify, etc.\n\n2. actively try to break into the intruder's system, really doing the same thing to him (though not sure how legal this is)\n\nHope this help...
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Decentralized networks lack any infrastructure such as access points, hence they also called ad hoc networks or more specifically, Mobile Ad Hoc Networks (MANETs).  In MANETs, mobile devices can communicate with wach other either directly or in a "hop-by-hop" manner such that if device A is not in the direct radio range of device C, it will forward the data packets to device B (which is in direct radio range of A) which will relay it to device C.  This is called peer-to-peer routing.\n\nThe advantages of such networks are that they can be deployed rapidly and cheaply in environments such as military, disaster management (among firefighters since in case of disasters, the infrastructure networks can get destroyed like 911).  They also provide a lot of mobility and flexibility.  In addition, there can be other uses such as multiplayer wireless gaming (the new XBox 360 has this feature), direct multimedia streaming (laptop to laptop), etc.  I also envision an application where multimedia and mapping information can be streamed via an access booth to a PDA for travelers and tourists.\n\nMANETs provide communication in the absence of cell towers, access points, or any other infrastructure.  But it also has other issues such as security, lack of resource reservation, lack of admission control, etc.
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It's virtual impossible to answer this question directly within Yahoo Answers.\n\nI would recommend you use this website...\n\nhttp://vpn.shmoo.com/\n\n... which is a fabulous resource site to explain IPSec, include the how to.
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- Security and threats.  How to make your Wireless Network secure.\n- Reliability and sources of unreliabile and intermitten wireless networks.  How to increase reliability. \n\nGood luck and Happy Computing!
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turn them off.\nok more seriously, if you are most worried about outside "attacks" then take all the basic precautions you do for a virus on one computer and you probably want to look into a firewall.  alot of routers out there now have good built in "hardware" firewalls as well which work well.\npassword protect things, encryption.\nif you are running wireless you can turn on encryption and password protect it...though personally i'm against this, i have a real issue with broadcasting something out into the air and not sharing it with neighbors.  call me crazy, my phone is corded and my wireless network is called "free and open" and i haven't had any problems at all.  then again there isn't much on my puter that i wouldn't share with someone anyway or that is worth the effort of trying to get off it without my permission.  and nobody has really sucked up so much bandwidth that its caused me any problems.
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Read this:\nhttp://askcomputerexpert.ws43.com/security/