WhichofthefollowingarevalidpublicIPv4addresses？（）……

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

多项选择题Whichofthefollowingwouldbeconsideredaroutingprotocol？（）

A.OSPF
B.DHCP
C.SMTP
D.SNMP
E.RIP