EECS 1520 Lecture Notes - Lecture 19: Ncr Corporation, Wireless Lan, Fluorescent Lamp
8 Nov 2016
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Developed by ncr corp. (subsidiary of at&t corp. ) in 1991. Standardized in 1997 (ieee 802. 11) and popularized in 1999. Numerous ieee 802. 11 (a, b, g, n, ac) standards. Implement wireless local area networks (wlans: provides speeds from 11 mb/s to 1. 67 gb/s, uses the 2. 4 ghz and/or 5 ghz radio frequency band, 2. 4 ghz communication vulnerable to fluorescent lighting and microwaves. Devices called access points (aps) connect the wireless clients of a wlan to the rest of the lan. Whe(cid:374) usi(cid:374)g (cid:449)ireless te(cid:272)h(cid:374)ology, all other (cid:272)lie(cid:374)ts (cid:449)ithi(cid:374) ra(cid:374)ge (cid:272)a(cid:374) (cid:272)apture (cid:894)(cid:862)s(cid:374)iff(cid:863)(cid:895) your data packets: pa(cid:272)ket s(cid:374)iffi(cid:374)g (cid:272)a(cid:374) also o(cid:272)(cid:272)ur o(cid:374) (cid:449)ired (cid:374)et(cid:449)orks, (cid:271)ut the (cid:374)et(cid:449)ork (cid:272)lie(cid:374)ts do(cid:374)"t often change and are relatively trustworthy. Often used to create a personal area network (pan), connecting devices within your immediate vicinity: game controllers, keyboards, mice, mobile devices (e. g. , smartphones, smart watches, fitness trackers, hands-free devices (e. g. , headset, car speakerphone)
