CS/IS 101 Lecture Notes - Lecture 26: Dynamic Host Configuration Protocol, Ieee 802.11, Personal Area Network
Document Summary
2. 4ghz channels 1, 6, 11 are guaranteed to not overlap. Automatic channel selection makes the wap search for least congested channels to use. On 2. 4ghz is common to make it manually. On 5ghz is common to make it auto. Channel width 20mhz, 40mhz for 2. 4ghz; up to 160mhz for 5ghz. A site survey (like wifiman) shows available channels in an ism band. Make sure that wireless card is enabled before connecting to wap. All wireless clients can scan the entire 802. 11 spectrum to find available ssids. Clients create profiles that store the ssids and their passwords. Sticker that stores bits of information; has radio. Rfid reader power up stickers to transmit energy to reader. Bluetooth designed to connect only two devices at a time. Personal area network created between paired devices. One device gets on pairing mode, other device goes on seeking mode. Use a wi-fi analyzer to troubleshoot wi-fi issues.
