A.Creation(创造)
B.Communication(沟通)
C.coordinate(协调)
D.Confidence(信心/信任)
A.Right
B.Wrong
C.Doesn't say
A.echo0>/proc/sys/net/ipv4/icmpecho_ignoreall
B.echo1>/proc/sys/net/ipv4/icmp_echo_ignore_all
C.echo0>/proc/sys/net/ipv4/tcp_syncookies
D.echo1>/proc/sys/net/ipv4/tcp_syncookies