Which of the following network protocols is needed to ensure that users can type in a FQDN instead of the IP address？（）

多项选择题WhichofthefollowingarevalidpublicIPv4addresses？（）

A.10.2.127.220/16
B.127.0.0.1/24
C.212.2.17.54/16
D.9.2.128.254/8
E.127.2.126.213/24

单项选择题Auserhasasmallnetworkoffourcomputersthattheywanttoconnecttoasinglecablemodem.Whichofthefollowingdeviceswouldallowtheusertodothis？（）

A.Four port switch
B.Four port wireless router
C.Four port WAP
D.Four port hub

单项选择题Auserstatesthattheycannotaccessanetworkshareddrive.Thetechnicianhasverifiedthattheclientsnetworkcableisgood.TheIPaddressofthemachineis169.254.10.15.Whichofthefollowingisthecauseoftheproblem？（）

A.The WINS server is not resolving names properly.
B.The DNS server is not resolving names.
C.The DHCP server is out of IP address leases.
D.The hosts file is corrupted.

单项选择题EnsuringthatdataistransmittedsecurelyoveranIPnetworkisthemainpurposeof：（）

A.Telnet
B.FTP
C.SIP
D.TLS

单项选择题WhichofthefollowingisSTPBESTidentifiedbyunderthecablesheath？（）

A.Number of twists in wires
B.Number of wires
C.Lubricant
D.Foil