Wireless network pass on to any kind of computer network that is cable less and generally linked with a telecommunications and based on IEEE 802.11. Wireless Network can implement between nodes without any wire and remote information transmission system uses the radio waves, at the physical level of the network. There are several benefits of Wireless Network such as file sharing, Internet connection sharing, multi-player games, Internet telephone service, Computer mobility, and No unsightly wires. 802.11 support networking bandwidth and have an array of choices such as 802.11b, 802.11a,802.11g, 802.11n also known as Wi-Fi technologies and designed for precise networking programs. The hardware requirements of a Wireless network are Network adapter, Repeater, Network hub, and Modem.
There are different types of Wireless Networks such as LAN in which radio signals are used instead of wires and transmit data from one Pc to other Pc in the same network as it is Wi-Fi is a wireless network that enables connection to internet with WiFi functionality. it produced radio waves that can be picked up by WiFi receiver and fixed wireless data is also type of LAN that can be connect more then one building with the mean of sharing .The MAN have ability to connect several local area networks and a term WiMax used to represent wireless metropolitan area networks and Mobile devices networks contains Global System for Mobile Communications which is called GSM network and mainly used for cellular phones, Personal Communications Service is a radio band used to set up PCS and D-AMPS is an upgrade version of AMPS.
A Wireless network containing basic setup and to use a wireless network you have to need a networking card and Kernel config require IEEE 802.11 wireless network driver, Hardware Access Layer and ample Rate control algorithm. Wireless to crypto support modules .There are different kind of protocol used in a Wireless network, it has routing protocol such as DSDV, AODV, B.A.T.M.A.N, PWRP, DSR, OLSR, OORP, TORA,HSLS and The Ad-Hoc Configuration Protocol and Proactive Auto configuration. There are different related terms used for wireless network like WEP is a security protocol from IEEE, SSID, Static IP, DHCP, Subnet, LAN, WLAN, MAC, WAP, and Sniffer but the most commonly used term in these days is Wi-Fi such a technology wrapping the world.
Wireless network faces much security threat due to some reason as Spread spectrum used in LAN not very protected because the spreading codes openly therefore companies can intend the 802.11 mechanism and a hacker can easily demolish the security as it is a hacker can still snuffle the SSID. The use of DHCP in wireless network is also helpful for hacker to spoil your files because it automatically assigns IP addresses to users as they become active and hang the system. Generally networking security attack divided into two types which are passive and active .Passive including Eavesdropping, and Traffic analysis and active including Masquerading, Replay, Message modification, Denial-of-service. Loss if integrity and confident also cause of lack of security so it is necessary for all organizations that they make their system more secure even than before as no one can interrupt in it.
Sunday, April 25, 2010
IEEE 802.11
The IEEE 802.11 is consisting of of numerous mechanism and services that interrelate to present station mobility translucent to the higher layers of the network mass. IEEE 802.11 is a combination of wireless LAN. We can use IEEE 802.11 and WiFi often as interchangeably depends on market demand. It is a basic protocol of any high speed wireless network from 1997 to 2008. There are lots of change occurred in it but the basics “high performance" never change. The frequency of it is from 2.4 GHz to 5 GHz and range is from 100 meter to 5000 meter. It specifies a single medium access control as MAC and three physical layers and offering different service such as Authentication of system, Deauthentication of system, data privacy, MSDU delivery, Association with files and system, Disassociation, Distribution of data, Integration of information, and Reassociation. You can configure a station with IEEE 802.11 in different ways as independent configuration, and infra-structure configuration. The IEEE 802.11 starts from the need to connect more than one computer with each other wirelessly especially where the wire cannot go.
IEEE 802.11 required accepting device to activate in a peer-to-peer fashion within the possibly of overlie same as access control level and data transformation services to allow top layers .There are several physical layer represent signaling methods and interfaces. Solitude and safety of user data is being moved over the wireless media via IEEE 802.11.According to OSI model an IEEE 802.11 protocol having direct frequency, hopping sequence, spread spectrum PHY and infrared PHY. IEEE 802.11 specifies a single medium access sub layers called MAC and physical layers with different specifications. The first is physical layers having two radio and infrared. The physical layer contain Frequency Hopping Spread Spectrum Radio PHY offering 1 Mbit/s with two level and 2 Mbit/s with 4 level, As it is Direct Sequence Spread Spectrum Radio PHY provides DBPSK and DQPSK with 1 and 2 Mbit/s operation, Infrared PHY offer 1 Mbit/s with16-PPM and 2 Mbit/s with –PPM.
These days 802.11a, 802.11b, and 802.11g are mostly in use to create a network home, offices and commercial locations. The architecture of IEEE 802.11 consists of 802.1X for verification, RSN for maintenance track of links, and AES-based CCMP to provide privacy, veracity and basis. IEEE 802.11with the propagation of modems and DSL services makes it reliable. People always desire to set up small networks in their homes to distribute their elevated rate Internet connection. There are many free networks commonly permit anyone within specific range, counting passersby outer, to connect to the Internet. There is also hard work by unpaid helper groups to launch wireless community networks to provide free wireless connectivity to the public. Networking without wire
IEEE 802.11 required accepting device to activate in a peer-to-peer fashion within the possibly of overlie same as access control level and data transformation services to allow top layers .There are several physical layer represent signaling methods and interfaces. Solitude and safety of user data is being moved over the wireless media via IEEE 802.11.According to OSI model an IEEE 802.11 protocol having direct frequency, hopping sequence, spread spectrum PHY and infrared PHY. IEEE 802.11 specifies a single medium access sub layers called MAC and physical layers with different specifications. The first is physical layers having two radio and infrared. The physical layer contain Frequency Hopping Spread Spectrum Radio PHY offering 1 Mbit/s with two level and 2 Mbit/s with 4 level, As it is Direct Sequence Spread Spectrum Radio PHY provides DBPSK and DQPSK with 1 and 2 Mbit/s operation, Infrared PHY offer 1 Mbit/s with16-PPM and 2 Mbit/s with –PPM.
These days 802.11a, 802.11b, and 802.11g are mostly in use to create a network home, offices and commercial locations. The architecture of IEEE 802.11 consists of 802.1X for verification, RSN for maintenance track of links, and AES-based CCMP to provide privacy, veracity and basis. IEEE 802.11with the propagation of modems and DSL services makes it reliable. People always desire to set up small networks in their homes to distribute their elevated rate Internet connection. There are many free networks commonly permit anyone within specific range, counting passersby outer, to connect to the Internet. There is also hard work by unpaid helper groups to launch wireless community networks to provide free wireless connectivity to the public. Networking without wire
In searching information online, I suggest to use paid reverse phone lookup. This will give you an accurate result and in a timely manner. Usually these results are being bought on the carrier’s database that is why you can say that the information that you will get in a paid reverse phone lookup is reliable. And most of the paid services have guaranteed so if in case that you didn’t get the information that you want, you can take back your money. Isn’t that a good deal? It is reliable and will guarantee you of the results plus it will only take you a minute in searching for the information that you need.
In a reverse phone lookup you can have detailed information such as phone numbers, addresses, names of relatives and more. This information usually came from phone companies or some cable companies which are being paid just to have access on such information. This will be a great help to those people who thinks that they are being cheated by their partners. This service is made for you and for your security as well.
So before considering a free reverse phone lookup service, you need to think twice if you will go to a free service and get an unreliable result. Or use paid services that guarantee you to have the information you needed and take away the doubt that you have after getting the results of your search and knowing the mysterious caller of your partner.
In a reverse phone lookup you can have detailed information such as phone numbers, addresses, names of relatives and more. This information usually came from phone companies or some cable companies which are being paid just to have access on such information. This will be a great help to those people who thinks that they are being cheated by their partners. This service is made for you and for your security as well.
So before considering a free reverse phone lookup service, you need to think twice if you will go to a free service and get an unreliable result. Or use paid services that guarantee you to have the information you needed and take away the doubt that you have after getting the results of your search and knowing the mysterious caller of your partner.