Girl Geekette

• 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

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