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LESSON 4 – SERVICES AND CONNECTIONS
Table of Contents
“License for Use” Information............................................................................................................... 2
Contributors..............................................................................................................................................4
4.0 Introduction........................................................................................................................................5
4.1 Services...............................................................................................................................................6
4.1.1 HTTP and The Web.....................................................................................................................6
4.1.2 E-Mail – POP and SMTP..............................................................................................................7
4.1.3 IRC................................................................................................................................................8
4.1.4 FTP................................................................................................................................................8
4.1.5 Telnet and SSH..........................................................................................................................10
4.1.6 DNS.............................................................................................................................................10
4.1.7 DHCP.........................................................................................................................................11
4.2 Connections.....................................................................................................................................12
4.2.1 ISPs ............................................................................................................................................12
4.2.2 Plain Old Telephone Service...................................................................................................12
4.2.3 DSL..............................................................................................................................................12
4.2.4 Cable Modems........................................................................................................................13
Further Reading.....................................................................................................................................14
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