Internet not owned by anyone, just a system of networks connected to one another
Computer Network Hierarchy:
personal pc-->LAN--> communication company (POP)-->nap-->Internet
Routers: determine where to send information from one computer to another
NSF created the first "backbone" in 1987
4 digit #s in IP addresses called "octets" b/c of binary representation
URL=uniform resource locator
multiple DNS servers at every level to handle requests
All machines on the internet are either servers or clients
HTTP: Hypertext transfer protocol--determines how servers and clients will "talk" to each other w/ the DNS
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