1969? ARPANET ????

1
??????????

• 1969? ARPANET ????
• 1970??????TCP/IP
• TCP (Transmission Control Protocol)
• IP (Internet Protocol)

?)???????????U of Utah, UCLA, UC Santa
Barbara, SRI?4??
2
????????
?????????(SMTP)
????????(TCP)
???????(IP)
????(Ethernet, PPP)

• 10BaseT,FDDI??????
• MAC?????CSMA/CD?????LAN
• PPP???WAN

3
IP????

• 32?????????????
• ARP???MAC???????
• IP??????DNS

133.7.60.0
133.7.60.254
A
Gateway
133.7.60.1
133.7.56.254
133.7.56.0
B
133.7.56.12
4
TCP????????
??????
??????
21
2000
????
????
TCP?? ?????
TCP?? ?????
????
????
????
????
IP?? ?????
IP?? ?????
133.7.49.193
133.7.60.130
5
??????????

• ????????IP?????????
• ???????????MAC????? ????????

???????
6
?????

• SMTP(Simple Mail Transfer Protocol)
• sendmail???MUA???
• ????????????
• Hotmail??????????