Background
IP (Internet protocol) has two functions: to deliver packets; to fragment and reassemble packets
IP has a Ågprotocol type identifierÅh that allows other protocols to run on top
TCP runs on top and handles error checking and resending but slows traffic because it is slow
Other services have their own TCP ports
Telnet --> port 23, SMTP --> port 25, HTTP --> port 80
Clients access the server through a ÅghighÅh port (>1024) on their own server
III. Technical security
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