A、难以控制 B、难以获得 C、难以复制 D、难以模仿
A、rpm -qa|grep "/etc/named.conf" B、rpm -qf /etc/named.conf C、rpm -qi /etc/named.conf D、rpm -ql /etc/named.conf
A、ASN.1 B、BER C、SNMP D、SMI
A、show ip route B、show version C、show interface D、show run
A、/ B、prefix-length C、no mask D、block size