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Chapter 6: Networks
6 links : N(N-1)/2 = 4(4-1)/2 = 4*3/2 = 12/2 = 6
Hub : Hubs operate at the physical layer (1) of the OSI and TCP models. All devices connected to a hub share bandwidth and are considered in the same Ethernet ‘broadcast domain’.
Auto-configuration: Addresses begging with 169.254 are designated as Link Local addresses (RFC 3927), dynamicall configured by the local device as result of not obtaining a valid address via DHCP.
(A)DSL: distance from client location to the provider facility is degraded over copper wire.
PAN: Persona Area Network
802.11a: Initially deployed (due to cost) primarily business environments. With penetration of 802.11n into the consumer market, wireless home APs have become available that support both the 802.11b/g (2.4 GHz) and 802.11a (5 GHz) frequencies.
802.11n :the ‘n’ standard operates in both the 2.4 and 5 GHz frequency ranges.
IEEE : Institute of Electrical and Electronics Engineers.
TIA/EIA-568 – specifications drawn by the Telecommunications Industry Association.
Connectivity – how devices connect to the LAN.
Application – Web connectivity travels begins with a browser (at the Application layer) initiating a request which travels down the local computers Application and TCP/IP stack(s). The Application layer is the top layer (1) of the OSI networking model.
100 meteres (328 feet)