When teaching networking, we often use the example of throwing a rock into a river to teach the concept of attenuation. Think of going down to the water and throwing in a rock. You see an epicenter where the rock went in and waves rippling out from that epicenter. The farther you get from the center, the weaker the waves get. The concentric circles that you see are similar to the radio waves as they propagate away from the antenna.
When the antenna propagates the high-frequency AC signal into the air, it forms radio waves. These radio waves propagate, or move away, from the source in a straight line in all directions. Just imagine the rock going into the water. Read more →
Wireless Local Area Networks (WLAN) technology adopted by more and more educational institutes, in homes, businesses and now in every where you can find in public areas. Because of its flexibility and due to reduction in the cost of wires consumers are happy to employ this technology. According to recent survey millions were updated their way of networking because it’s cheapest ad comparing to wired networking technology. It also encouraged due to the upcoming standards.
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We know that wireless communication 4th generation is the next step after the deployment of the 3rd generation technology and after some years it the 3rd generation will hide as like the 2nd generation was hidden before. It supposed that after some years it totally replace the 3g system with 4g wireless communication system. Now the frequency bandwidth is going up to 2Mb/s and this race will be continue due to new technologies in the wireless communication. If we talk about 4G many of computer scientists have different ideas about this generation and have not deep knowledge or it can be say that they have no judgment of the future. So it can’t say anything that when the 4G infrastructure will be deployed in the future may it takes more than ten year.
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