单选题An operator is asked to shutdown the telnet service for security reasons. What are the appropriate commands to achieve this?（）Acomment out telnetd in /etc/services refresh -s inetdBcomment out telnetd in /etc/inetd.conf refresh -s inetdCcomment out telnetd in /etc/rc.tcpip refresh -s telnetdDcomment out telnetd in /etc/inetd.conf refresh -s telnetd
单选题
An operator is asked to shutdown the telnet service for security reasons. What are the appropriate commands to achieve this?（）
A
comment out telnetd in /etc/services refresh -s inetd
B
comment out telnetd in /etc/inetd.conf refresh -s inetd
C
comment out telnetd in /etc/rc.tcpip refresh -s telnetd
D
comment out telnetd in /etc/inetd.conf refresh -s telnetd
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