WI-FI 802.11b
Wi-Fi 802.11b has been spawned as a wireless standard in the year 2000. Even now it is considered as the base of wireless networking technology implemented both in business and residential purposes. Most of the networking applications opt for this standard mainly because of its excellent throughput of about 2.5 to 4 Mbps. This throughput is suitable and tolerable for all types of file transfers. Most of the firms, universities, companies, residential need their networking without the cumbersome of wires and hence they go for the wireless access points. In fact, grandeur restaurants, coffee houses, hotels, railway stations, airports and some sort of small firms are also started using the Wi-Fi connectivity for the convenience of their customers.
To achieve a transient accessibility in your network, just you need to have a faster broadband connection through any means and a wireless access point. Most of the PCs, laptops and note books are coming with inbuilt Wi-Fi. In cases of absence, you can just buy and attach an add-on card. Usually this 802.11b is considered as the cousin standard of 802.11 with a running speed of about 11 Mbps. It is capable of running in a 2.4 GHz spectrum. You can even share this spectrum with other external applications.
Basically, this 802.11b is operable in two modes. It may be ad-hoc or infrastructure. In the ad-hoc mode, the PCs can be able to communicate with each other without any access point. But in the case of infrastructure mode, a wireless access point is mandatory. The access points are of three types as bridge, NAT router and NAT router + bridge. In the bridge type, both the wired and wireless networks are connected in a transparent manner. In case of NAT router, traffic found in the wireless network are routed to the wired networks. Finally, NAT router + bridge links both the wireless and wired networks with the help of IP address.
Security is the thing which strikes our mind when we analyse a wireless router which is extremely assured with this 802.11b standard. By enabling wireless encryption protocol (WEP) with this network adapter, highly secured wireless network is achieved. But when you enable this WEP, you cannot expect the actual accessing speed since some of the strength is being used by WEP. For this purpose of encryption, certain 64 and 128 bit keys are being provided. Your nodes of the network should be kept in such a manner to use the same key at the same encryption level. Many levels of encryptions can be enabled to protect the network from the scandulous factors.
Usually this 802.11b comes in two forms as USB for desktops and PC cards for the laptops. This USB is better for windows XP,2000 and PC cards can be used for windows 98/SE/ME. A PCI adapters is given with the PC cards to plug it into a PCI slot. This 802.11b is basically a half duplex protocol. They either send or receive at a time and not the both. Both technically and practically, this 802.11b standard sounds good. So, all the latest wireless networking standards are being derived from this 802.11b.
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