自学考试计算机网络技术试题

20107(20120)1.()A.-B.C.-D.2.3KHz4()A.48KbpsB.24KbpsC.18KbpsD.12Kbps3.()A.B.C.D.4.ARP()A.IPB.IPC.IPD.IP5.OSI()A.B.C.D.6.RS-232CRI()A.DTEDCEB.DTEDTEC.DCEDCED.DCEDTE7.()A.B.C.D.8.()A.1000Base-TB.1000Base-LXC.1000Base-CXD.1000Base-SX9.1310WWDMLAN()A.65B.300C.1OD.4010.OSI()A.1B.1-2C.1-3D.1-411.ISDN()A.PCMB.C.D.12.ATM()A.B.C.D.13.xDSL()A.512Kbit/s1Mbit/sB.144Kbit/s8Mbit/sC.128Kbit/s2Mbit/sD.64Kbit/s52Mbit/s14.ADSL()A.B.C.D.15.()A.FTTCB.FTTZC.FTTOD.FTTF16.IP()A.ISPB.C.ICPD.()A.B.C.D.18.E-mail()A.E-mailB.E-mailC.E-mailD.E-mail19.E-mail@IP()A.B.(DNS)C.(URL)D.20.ISP()A.B.C.ADSLD.(20120)21._________22.________23._________24._________25.OSI_________26.TCP/IP_________UDP27.CSMA/CD_________28._________29.MAC_________30._________31._________32._________33.ATM_________34.xDSLHomePNACable_________35.VPN_________.36.ISP_________(DDN)ISDN37.InternetISP_________38.Internet_________MODEMInternet39.IP_________Internet40.InternetIP_________(3,618)41.?42.ITUATMAAL43.IP138.23.?16?IP138.23.14.47138.23.15.149?(3618)44.PAM240012000bps8?()45.Modem2400bps12M(1M=106)l()?()46.100BaseT200m200m/s(s)(bit)()(3824)47.T148.TCP249.(1)/??(2)?