单项选择题
Which of the following network services is responsible for mapping names to IP addresses？（）
A.DHCP
B.DNS
C.IMAP4
D.Telnet
相关考题
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单项选择题
Whenoneconnectiontoahostfailsinafullmeshnetwork，whichofthefollowingistrue？（）
A.All hosts can communicate.
B.No hosts can communicate.
C.Half of the hosts will lose communication.
D.Only the two hosts between the failed connection will lose communication. -
单项选择题
AuserconnectstothecompanysintranetserverviaaVPNconnectionfromasmalloffice/homeoffice（SOHO）usingthebroadbandservice.Oneday，theusercannotsuccessfullyconnecttotheVPNandreceivesanerrormessagethatstates"Usernameandpasswordareinvalidonthedomain."Whichofthefollowingshouldbedonetocorrectthisproblem？（）
A.Call the corporate help desk to have the VPN server rebooted
B.Re-enter the username and password in the VPN connection and reconnect
C.Call the broadband Internet provider to replace the SOHO router with a newer model
D.Ping the corporate VPN server to ensure it is online -
单项选择题
WhichofthefollowingistrueregardingNetWareDirectoryServices（NDS）configuration？（）
A.Remote users can access the tree through dial-in connections.
B.Mobile users do not require changing the NDS name context.
C.Remote users do not require a special NDS object entry.
D.There are no differences between mobile users and remote users.
