IT????????

1
??????
2
IT????????

• Web?????
• ??????????
• ??????????????
• ????????
• ???????
• ??????????
• etc

3
??????????????
Web???????????????
?????????
?????????????? ????????
??????? ??????????
????????
???????
???????
???
4
????????????

?????????
TCP
UDP
HTTPSMTP POPFTPTelnet
TFTPDNSRTP


????????
IPsec
???????
IP
802.1x
ARP
???????
L2TPPPP
xDSLATM802.3Wireless
???
5
???????
???????????? Ethernet TCP/IP????????? Windows?U
nix??OS????????
6
????????????
??????????? Ethernet TCP/IP?????????
7
Ethernet
???? 100BASE-TX 100BASE-FX 1000BASE-T
1000BASE-LX 1000BASE-SX ???????? ???? ????
??? ????????????? ???????????
8
TCP/IP?????????(1)
???????????? IP IP???? ? ???
?????? ARP ICMP PINGTraceroute
????????????? TCP UDP
9
TCP/IP?????????(2)
???????????? DNS HTTP HTTPS FTP SMTP
POP Telnet(????TeraTerm) VPN??????? PPTP L2TP
IPsec
10
OS????????
??????????? ???? ???? ???????? ???????? ????
?????? ????????