is a 130 bit preamble part of the 802.11b standard. If not what satndard is it part of.?
445794
The preamble can be 130 or 128 bits.  I believe it is the Physical Layer Convergence Protocol or PLCP preamble section, just before the 6 byte header.\n\nSome products are hard coded to 130, and others to 128 (like Samsumg I730).  When those meet, there is no way for them to connect.  Most newer ones will recognize the both preamble lengths.
702417
Yes, 11G (802.11g for the name of the standard) is a wireless technology rated at 54MBs and suitable for Lan use.\n\nThere's only one type of wireless "G".\n\nHowever, most newer cards, laptops. and equipment which support "G" also support the more common (albeit slower) "B" cards which run at 11MB/s.  There's another one rated at 54MBs that only works at a much shorter range than "B" or "G".  It's called "A", and is seldom used, but I included it for completeness sake.\n\nAny of those speeds is way more than a home DSL or cable modem connection could send in either direction and would just matter in PC-PC communication and transfers within the wireles or wired Lan range.\n\nThere is a new wireless coming out that will support a faster speed and greater distances. It will be called "N" (for the specification "802.11n") or MIMO for the technology.\n\nThe specifications for 802.11 have not been completed.\nVendors are making and selling "PRE-N", "mimo", or "turbo" routers which are similar to what they think the new standard will be.\n\nAt the moment, you should plan on only being able to use the newer speed of up to 108MB/s if all of the equipment is from the same manufacturer, and is all PRE-N or whatever. Regular old "G" or "B" will slow it down.\n\nInteroperability between different manufacturers "pre-n" equipment has been tested and is unreliable at best.\nIt's usually way short of meeting the stated ranges assuming it works at all.\n\nUnless you need the extra range, you should stick with "G" equipment for now.\n\nIn a few months "N" will be ratified, and vendors are hoping that an upgrade will allow their "Pre-n" equipment to be truly 802.11n compatible - that should take from 2 weeks to 3 months.\nA year from when "n" is standardized, the price will be down to what G is going for now.  And you still may not even be using the full speed of G.\n\nOn the low end, I've see G wireless routers that will support a decent number of wireless PCs (8-12) and also have a 4-port Ethernet switch for as low as $25.00 (Best Buy - a few months back).\n\nAs with most things, your mileage will vary, so plan on about getting around 74% of the rated speed of any of this.\n\nDecide what your objectives and needs are and THEN figure out what equipment to get to meet you needs.
795869
You are losing the Internet connection on a temporary basis and need to check all your wiring connections and if you are using a wireless network it is highly recommended that you use a 128 bit encryption code for your wep. That will utilize the hexadecimal base-16 with symbols 0 through 9 and  A through F with a total of 26 symbols.
495154
a wireless communication standard.
533674
WiFi is a LAN protocol (that is, it doesn't involve routing) so anything involved with WiFi, such as SSIDs, has to be either Layer 1 (physical) or Layer 2 (data link).  And SSIDs don't have anything to do with the physical aspects of transmitting and receiving radio signals, so I'd say that mismatched SSIDs are a Level 2 problem.
567741
well it depends on what you are connecting to, like most routers have some kind of security like WEP or its encrypted, make sure your wireless card can handle a 125 bit encryption instead of a 64 bit, and configure your access point to urn that on, if you are connecting to an unsecured wireless network like me then you can still log into their router and make sure its encrypted (i don't think that's breaking any laws since they didn't have a password).
228993
Okies so you want to know about baud.. Actually when we transmit a signal.. each signal can carry from 1 to multiple bits depending on the kind of voltage level available to us. So the no of bits carried by a signal at a time is baud. So 9600 baud in hyper terminal means it will send 9600 bauds, no of bits depend on underlying physical layer. \n\nParity is a technique for knowing wether the packet I transmitted is correct or not suppose my signal is 1101 then even parity is sendin no of 1 is even or odd if its even i attach one at end so my packet becomes 11010 becase no of 1 is odd.\n\nFlow control means wether the sender and reciever should agree on some buffer limit or the sender can send as many bits it wants to send without thinking abut the recievers capability.\n\nstop bit is a bit added at the end of message to represent the message is terminating.\n\n8 data bits is that the windowing used in flow control will be 8 bit large.\n\nHope it pacifies ur thrust or u can ping me up at vinod_recj@yahoo.com
126117
Agree with #1, and will expand.\n\nMost consumer available wireless G receivers can receive wireless B signals, but not necessarily. You need to make sure the wireless router is capable of that. Indication is usually well marked on the equipment.
698398
The answer to this question is, it depends on the wireless client that the card is using.Some wireless client doesn't accept WPA as an encryption. But mostly the problem lies on the router/hub. Its because of the firmware that it is using. Firmwares acts as an operating system for routers/hubs. Mostly WPA or WPA2 depends on the firmware that the device is using.
233906
It is wireless router standards.  They tell you at what maximum speed the router will transmit or receive data.  The highest standard is G.
195047
WiMax stands for Wireless over Microwave access. It is a new standard that is coming up as an extension to broadband technologies such as DSL and Cable, especially where these services are not available. The underlying technology is still Orthogonal Frequency Division Multiplexing (OFDM).\n\nFor more info: http://www.tutorial-reports.com/networking/broadband\n\nhttp://www.wimaxforum.org
871267
This may happen if you are choosing WEP 64Bit instead of WEP128Bit Key.\n\nWEP128 Bit Key is much longer than the Wep64 Bit Key.
1151292
802.11b and 802.11g both work under the 2.4ghz frequency range.  This means that they are inter-operable with each other.  All 802.11g devices can communicate with 802.11b devices.  The advantage of 802.11g is that you will be able to transfer files between computers or networks at much faster speeds.  \n\nIf you are using your wireless connection to transfer files around the home or office, whether it be data files, music, video, or voice, you want to go with the 802.11g.  With the home audio and theater moving to wireless networks, you want to be sure to have an 802.11g network setup in your home.  \n\nThis standard also allows for some manufactures to have devices working at speeds  up to 108mbps, which is recommended if you plan to transfer large data or audio files within your LAN.
459976
You can configure atleast 255. Curious, why would you need so many? Typically huge networks have less than 3 or 4.
411610
There are entire books published on wireless security, but here's all you need to know for your home WiFi LAN: WPA2-PSK.  In most cases, WPA refers to pre-standard stuff, while WPA2 refers to the properly implemented IEEE 802.11i security standard.  The PSK is for Pre-Shared Key, which means you will configure the same password/passphrase on all of your equipment.  If your router or access point and wireless interface cards support WPA/WPA2, this is what you should be using.  If you have older equipment that does not support WPA/WPA2 then at least turn on 128-bit WEP.  WEP has known weaknesses (at any key length) and can be "easily" broken.  In reality, while the encryption itself might be easy to break, it's beyond the desire or capability of the average home user.  Try it sometime.  It takes a bit of work.  Basically, I like to say that WEP will keep your honest neighbors honest.  If you are using WEP, change your key once a month or once a week, just to piss off anyone who has cracked your key so they'll have to break it again and they will give up.  WPA or WPA2 will make you bulletproof in the average neighborhood or apartment complex.  Make sure that you choose a decent length password for the WPA pre-shared key.  They can be up to 63 characters long, the longer the better.  Finally, don't forget to use wireless MAC address filtering too.  You put the 48-bit MAC address from your computers into the access point so it will only allow those devices to communicate with it.  Get your MAC addresses typically using the "ipconfig /all" on a PC or "ifconfig -a" on most Unix boxes.  Lastly, change the default password on your router, and disable any type of remote management options.  One more thing, you can also disable SSID Broadcast, but this is not really meant to be a security feature, it's more to prevent accidental associations, and your neighbors wouldn't "see" your network, unless they knew how to look for it.  And of course, nothing is 100% secure, so also be sure to have your computers protected with the latest security package that has at least a personal firewall and virus scanner, such as McAfee SecurityCenter or Norton's.
1163964
It might be a configuration issue or as the other person stated a problem with the access point you are trying to connect to as well.   Part of the answer will depend how on well you know your equipment and the equipment your trying to connect to.  There are multiple versions of the 802.11 versions out there. A B G N as previously mentioned, I don't believe N has been ratified yet, and it is unlikely you have A.  Probably 802.11B or 802.11G which are pretty standard installs in most machines.  You can start by making sure that you are compatibale with the access point your are trying to connect to.  Wireless networks can be set to only accept clients from certain bands, such as only G or B clients.  If your sure you have interoperability, then check to make sure the SSID or the broadcast name of the AP is also setup in your machine.  Most SSIDs are broadcast openly and will allow a machine to connect even if the connection is unsecured and will do this automatically.  If the SSID is not broadcasting you'll have to get the name and setup a new SSID.  I have noticed on XP that sometimes, it will note the connection is unsecured and wants confirmation before connection is established.  There are diagnostic tools in most laptop machines that will give you more information that will help decide where your problem is coming from.  If the connection is not using defaults, you may be experiencing issues from a security standpoint.  More advanced users will setup security on the AP itself which will require a WEP key before connection is established.  You'll have to find out if this is the case.  Another common problem I have seen with people attempting to connect to an AP is ad-hoc networks.  People initally setting up a SSID will tell the machine to create a connection where the laptop/machine itself becomes similar to a AP although more for a peer-to-peer connection, without ever realizing it.  If your familiar with XP, it uses different icons to distinguish between ad-hocs and APs.  If you are getting stronger connection to an ad-hoc and have not told your machine to connect to an AP infrastructure by default it can also attempt to use the ad-hoc before the AP.  ( Change this on the Advanced button on the bottom of the Wireless network connection properties window.)  On a XP machine, it will usually give you an indicator in the taskbar on the right, with some idea of what might be wrong.  If your connection is leaving you without an IP address you might try to verify that the connection you are trying to establish is the correct one.  Worst comes to worse, remove all the SSIDs that are located under the wireless network connection properties window and try to reconnect.  Right clicking on the wireless icon will also give you the option to View Available Wireless Networks, which might also give you an idea of the problem.\nI am of course assuming your running an XP machine and are familiar enough to find most of the spots I have mentioned.\nHope this helps you figure out your problem.
158017
802.11n is a newer standard of WiFi LAN, or wireless local area network technology, subsequent to standards 802.11a, 802.11b and 802.11g. Its proper name is IEEE 802.11n, as it is a protocol developed by the international non-profit Institute of Electrical and Electronics Engineers. The number “11” indicates the IEEE working group assigned to 802 standards, and the “n” refers to a special task group within this body, known as TGn.\n\nThe IEEE 802.11n standard is scheduled to be reviewed by TGn in November 2005 and should debut in the marketplace sometime in mid-2006. It will reportedly offer quadruple the data transfer rates of the current fastest WiFi technology. It will also operate on the 2.4 gigahertz (GHz) band, like 802.11b and 802.11g. This frequency does not require line-of-sight availability like 802.11a, which works in the regulated 5 GHz band. \n\nTo get an actual idea of the speeds expected in megabits per second (mbps), see the table below which compares the different 802.11 standards:\n\n802.11b 2.4 GHz 5-11 mbps \n802.11g 2.4 GHz 25-54 mbps \n802.11a 5.0 GHz 25-54 mbps \n802.11n 2.4 GHz 100-200+ mbps \n\nIEEE expects a smooth transition to the 802.11n standard with backwards compatibility built into new equipment, allowing consumers and businesses to upgrade network equipment gradually. The faster speeds will allow more robust applications to be effectively run over public hotspots and private LANs, and greater range is also projected.\n\nLike previous advanced WiFi standards, 802.11n will utilize multiple receivers and transmitters, a technology known as MIMO (multiple-input multiple-output). This allows parallel streams of data transmissions, or spatial multiplexing. The 802.11n standard will also incorporate OFDM, or orthogonal frequency-division multiplexing. OFDM splits signal frequencies up into several modulated channels for increased throughput. Aside from private and commercial LANs, 802.11n is expected to support an array of personal electronics including handheld devices. \n\nIf you are considering installing a wireless network in the near future, you might be interested in following the progress of 802.11n to see when it will hit the market. If so, you can track its status at the IEEE website.