#Mail
DNS (MX // A )
SMTP
POP3 IMAP
Relay(spam)
1) a.com
test a @ a.com
test b @ b.com
1) DNS
2) Sendmail
sendmail.conf
access:Relay
---오후
1.DHCP
- 자동 (통신 (IP,S/M, G/W, DNS )
1) PCI - Network 설정 - 자동구성
나에게 ip....... 줄 수 있는 사람
-> MAC
2)DHCP - >
3) PC1
4) DHCP