A technician is installing a basic router for a SOHO network. After installing the router the PCs connected to it are not able to acquire an IP address. Which of the following did the technician fail to configure correctly？（）

单项选择题WhichofthefollowingistheMOSTcommonpin-outconfigurationusedwhencrimpingRJ-45connectors？（）

A.UTP
B.T568A/B
C.STP
D.IEEE 802.5

单项选择题AnadministratorisinchargeofseveralremoteserversinJapan.Userscallandcomplaintheycannotconnecttothecompany’sresourceslocatedonthoseservers.Whichofthefollowingcommandswouldallowtheadministratortoverifytheserversarerunning？（）

A.ping
B.netstat
C.nbtstat
D.telnet

单项选择题WhichofthefollowingnetworkprotocolsisneededtoensurethatuserscantypeinaFQDNinsteadoftheIPaddress？（）

A.DNS
B.FTP
C.WINS
D.IMAP4

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