The Conclusion

          World today as we can see has made itself so used to technology that the world would collapse if it was taken away. The main reason for the tremendous growth of telecommunication is we needed a better way to relay massages to each other. These technology is hugely important aspect, not only for people around the world, but also for small and large business. It can connected people from all over the world and now, even major business we can handle it just from our home by using an internet, nothing is impossible. Besides, with technology, makes every transactions  or things get more easier and ready to go. It gives many benefits to ourselves, society and to the country also. In a nutshell, telecommunication, internet, and wireless technology getting more important along with the progress of the world's modernity.

Just for fun ;)

7.4 THE WIRELESS REVOLUTION : RFID AND WIRELESS SENSOR NETWORK

RADIO FREQUENCY IDENTIFICATION (RFID)

How RFID works.

1.  RFID is sytems provide the powerful technology for tracking the movement of goods through out the supply chain.
2. RFID system use tiny tags with embedded microchips containing data about an item and its location to transmit radio signal over short distance to RFID readers.
3. The reader unit consists of an antenna and radio transmitter with a decoding capability attached to a stationary or handhend device. 
4. The reader emits radio waves in ranges anywhere from one inch to hundred feet, depending on its power output, the radio frequency employed, and surrounding environmental condition.
5. The reader captures data, decodes them, and sends them back over a wired or wireless network to a host computer for further processing.

WIRELESS SENSOR NETWORK

A WIRELESS SENSOR NETWORK

1. Wireless sensor networks (WSNs) are ntwork of interconnected wireless devices that are embedded into the physical environment to provide measurements of many points over large spaces.
2. These devices have built-in processing storage, and radio frequency sensors and antennas.
3. They are linked into an interconnected network that routes the data they capture to a computer for analysis.

7.4 THE WIRELESS REVOLUTION : WIRELESS COMPUTER NETWORKS AND INTERNET ACCESS

WIRELESS COMPUTER NETWORKS AND INTERNET ACCESS

BLUETOOTH

1. Popular name for the 802.15 2 wireless networking standard.
2. Useful for creating small personal area network (PANs).
3. Links to 8 devices within a 10-meter area using low-power.
4. Can transmit up to 722 Kbps in the 2.4-GHz band.
5. Communicate with wireless phone, pagers, computers, printers, and computing devices even operate each other without direct user intervention.
6. has low-power requirements, making it appropriate for battery powered handled computers or cell phones.

WI-FI AND WIRELESS INTERNET ACCESS

Mobile laptop computers equipped with network interface cards link to the wired LAN by communicating with the access point. The access point uses radio waves to transmit network signals from the wired network to the client adapters, which convert them into data that the mobile device can understand. The client adapter then transmits the data from the mobile device back to the access point, which forwards the data to the wired network.

1. An 802.11 set of standards for wireless LANS and wireless internet access also known as Wi-Fi.
2. 802.11b -> transmit up to 11Mbps in the unlicensed 2.4-GHz band and has an effective distance of 30 to 50 meters.
3. 802.11g -> transmit up to 54 Mbps in the 2.4-GHz range.
4. 802.11n -> transmit over 100Mbps.
5. Wireless devices communicate with a wired Lan using access points.
6. Access points is a  box consisting of a radio receiver/ transmitter and antennas that link to a wired network, router,or hub.
7. HOTSPOTS = one or more access points providing wireless internet access in a public place.
8. Some hotspots are free or do not require any aditional software to use. 
9. Wi-Fi hotspots can be found in hotels, airport lounges, libraries, cafes, and college campuses.
10. Wi-Fi technology poses several challenges -> Wi-Fi's security features, which make these wireless network vulnerable to intruders.

WiMax

1. The IEEE developed a new family of standards known as WiMax.
2. WiMax which stands for Worlwide Interoperability for Microwave Access, is the popular term for IEEE Standard 802.16.
3. It has a wireless access range of up to 31 miles and transmission up to 75Mbps.
4. WiMax antennas are powerful enough to beam high-speed Internet Connections to Rooftop antennas of homes and businesses that are miles away.
5. Cellular handsets and laptops with WiMax capabilities are appearing in the marketplace.