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Unformatted text preview: Click to edit Master subtitle style Todd Lammles CompTIA Network+ Chapter 12: Wireless Technologies Instructor: Chapter 12 Objectives The Following CompTIA Network+ Exam Objectives Are Covered in This Chapter: 1.7 Compare the characteristics of wireless communication standards 802.11 a/b/g/n Speeds, Distance Channels, Frequency Authentication and encryption WPA, WEP, TKIP RADIUS 3.4 Implement a basic wireless network Install client Access point placement Install access point Configure appropriate encryption Configure channels and frequencies Set ESSID and beacon Verify installation 2 Wireless Technologies 3 Sipping coffee at a caf or hanging out in an airport until they finally fix the plane youre waiting to board no longer requires reading actual papers and magazines to avoid numbing boredom and kill time. Now, you can just connect to the local wireless network and catch up on your emails, blog, do a little gaming. The basic wireless LANs (WLANs) most commonly used today are similar to 10BaseT Ethernet with hubs. Typically run half-duplex communication. Everyone is sharing the same bandwidth. Only one user is communicating at a time. Wireless Agencies and Standards WLANs transmit over radio frequencies, theyre regulated by the same types of laws used to govern things like AM/ FM radios. In the United States, its the Federal Communications Commission (FCC) that regulates the use of wireless LAN devices Institute of Electrical and Electronics Engineers (IEEE) takes it from there and creates standards based on what frequencies the FCC releases for public use. 4 Frequencies Ranges The FCC has released three unlicensed bands for public use: 900MHz, 2.4GHz, and 5GHz. The 900MHz and 2.4GHz bands are referred to as the Industrial, Scientific, and Medical (ISM) bands. The 5GHz band is known as the Unlicensed National Information Infrastructure (UNII) band 5 Wireless LAN History Use of the ISM band started in early 1990. The ISM band is deployed today in multiple environments, including outdoor links, mesh networks, office buildings, healthcare, warehousing, and homes. 6 802.11 Committees and Subcommittees IEEE 802.11 was the first, original standardized WLAN at 1 and 2Mbps ratified in 1997....
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