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