单选题Which of the following network protocols is needed to ensure that users can type in a FQDN instead of the IP address？（）A DNSB FTPC WINSD IMAP4
题目
单选题
Which of the following network protocols is needed to ensure that users can type in a FQDN instead of the IP address？（）
A
DNS
B
FTP
C
WINS
D
IMAP4