A./etc/named.conf B./etc/mail/sendmail.cf C./etc/mail/sendmail.cw D./etc/mail/sendmail.mc
A.格式化I/O B.字符I/O C.行I/O D.块I/O
A.基于IPsec的VPN B.基于PPTP的VPN C.基于L2F的VPN D.基于L2TP的VPN E.基于SSL的VPN
A.shminit B.seminit C.semget D.shmget
