Girl Geekette dotNet

Warchalking is a term that describes the act of walking around with a laptop, picking up locations of wireless access points, and drawing symbols to mark various information about the wireless access points. The term was coined in London of June of 2002 by Matt Jones and a group of friends who used hobo-inspired symbols with chalk to mark various attributes to the wireless access points they encountered. He later posted the symbols on his blog and they became well known. The symbols - seen below each represent different descriptions of these WAPs.

The first symbol, on the left, represents an open Wireless Access Point. Anyone

 (Somehow this post got cut off. I will have to re-write the rest)

• NIC - provides the hosts access to the media
• Repeater - amplifies and retimes the signal; extends the physical length of a signal; if area of LAN is more than 200 meters in diameter, one can be installed to extend network; used in an extended star topology when theatchment area of one wiring closet is not enough
• Hub - multiport repeater; center of a star topology, all segments are in the same collision domain, all segments are in the same broadcast domain
• Router - makes packet forwarding based on logical addresses (layer 3); Most important traffic-regulating device on large network; passes data packets between networks, Each segment is in a separate collision domain; each segment is a separate broadcast domain
• transceiver - converts one media type to another
• Bridge - builds a MAC address table; uses MAC for forwarding; Each segment is a separate collision domain; all segments are in the same broadcast domain
• Switch - can significantly reduce collisions - each port on its own separate bridge; uses physical address for forwarding; Each segment is a separate collision domain; all segments are in the same broadcast domain