A.OSPFB.DHCPC.SMTPD.SNMPE.RIPWhichofthefollowingwouldbe……

单项选择题WhichofthefollowingnetworkservicesisresponsibleformappingnamestoIPaddresses？（）

A.DHCP
B.DNS
C.IMAP4
D.Telnet

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.

单项选择题Whichofthefollowingisaself-assignedaddressbasedonAPIPA？（）

A.169.255.1.0
B.169.254.1.1
C.192.168.1.0
D.192.168.1.1