WhichofthefollowingnetworkprotocolsisneededtoensurethatuserscantypeinaFQDNinsteadoftheIPaddress?()

WhichofthefollowingnetworkprotocolsisneededtoensurethatuserscantypeinaFQDNinsteadoftheIPaddress？（）

A、DNS

B、FTP

C、WINS

D、IMAP4