什么是DDN(数字数据网)啊?它是怎么工作的啊?DDN接入的网吧,或个人机器都怎么连接到因特网?怎么工作的.特性?我们现在的ADSL么类型的网?ISDN吗?

来源:学生作业帮助网 编辑:作业帮 时间:2024/08/30 21:49:21
xZ[o#Wr+z8^g Eb$wm^cA^IIH7HI)QPfFȺݤtB:}ؤfM-zsSÏ~8Ϟ=y.ϓ*FtCݩ?mktTeOU܎?z㻮nqNe^8;j1F?]Z0:}s[wuǟ<1,/=Wݧ}'x0<ݞ,dYA?{bQ/>[ gC~a8B(ώu![u6\T ^99í2v^F鶪l˺ml%2*7oT Tg'|\W͓vswe13 ꏶwFG4T%qVgPmU)~OѾ*v8%|Uй'j0j78 >Ax}pj⦖t'Nǯѳ~o~?_(fwlO[AOm,xxc AZŽ >c߃ɺ?=UD$H &m$Zu=߫Άt}x_#(oDo2FENF*V +ʞG+c d^I8ma&/&.T2BQf[0͠*ug ,[.Rz8Y ޣJU*+HU`--[GǛ59{0;vUq_Vۑ j_/yV+r,;`_/)KqC o7UU}$ T=B U:R3՟cW aE#ѥL'4&r+XԮ.+ujkQx85!3|,$|fWصp kë0g ]27;c~=$J-A`} p㍺dƢn"ÿE`hK5*#A8(#kċ l[ǀ=T%:%'x$y G=' $(]&%VSf!{U-=w?OC{@VXQ4Vc2m1'DÍ+r۷2.HɊʮ(I/509pB b~QM"(Uvc+Z8\U۰>4I5>9.<1O!̘10v]0n]d!FP -Z Ods;*?oA͹$瓑w*N/h]QŬȏMu9(%#5F#PiCV예igy{Hq h1f0y-)?Jbdc759N_aυs$CŠ"v ~W u[H%}[,} a I7+~d&;]6!WB R!V~:,EPtβO* $.  rEDPtB-]5EKg ,N <{-C*VrTq5𮌬`w>qz z%l9g" -SuUVbdyWՅsKBTX.Q+yHiĒOәC꿦-|IeN4! rיiAMG9U [9$?1E,aP!Y@2 o>Tk{mIQ[u1{ V$[QA C ߗ: .֔wP#%PVNބzF R8lhVI4Uj@Te8G,Bs ڿ .PJjeg9|M%ljN EW%و Q#W۶v-4`v}k Мb28>e%}{hL2ZD džH'oJJjňvaJPWiYp n.fybn:ѽ; g }t0zah:;,d&̇DK񝔜'Ivxʠ8yy‘J7D{R5 ^>u#)S҈\J|1Ҋb%Ж@ҴHB;96&qZqx{%o:luL,:& y R/'/!'EiQ'5M#Lk0vG08ػNsؒ:܄wQ!~>FIFS4 . @kp>'ZhFO)i'k%Q}>JWRdL#VV~Aw+8z#\IQL-I:.G,o)&U:`bT2>p}p_9RUHa@0hqWckY jn,כm{=:PYh2)@,%*#K_LmÔYfs \T JQx] N-G3:Y챽j'CL^ŵWpvWX$/):,J"+Dޱt*㥎4hܙ,pgt9Ѻ]D?jG<+CUJu0$'ZQrHC4LxB gҝMK@)9v^E]v4x+^keZ# 41%/ʀI{y/73qz5㙾jn3) 5Жh&}w L͉QvYj);qIWԔE"jmpꀀJLs[VkY8@B xBcI$vg'E/jP #6O ^X<#Ɩ*QC@2 gAY[r>sĸ }%.̌两0?ܜg3Κ)az|Rp?~% 1ҍf`+q9 x>xt:I{ض8IԛFoP%JUUv0.:9 {Nۧ4,(1wblK]uzC{u#,YwkFbK鷱P 9Yogd_JuӂTp+ 鲢uH"u_ .ʞ*",6Ce5YWnC Vjm^%AYwA[{h_-pl]#>8N]qfdϗөBE` :?Vd<1f?"44w\wRD<?$B5?OP;,㒳lPq9JQ:WƖ\Hkhas,=m`zȣr{:2 VIHx~X8Dv1  ] ̥\r\1@t `{܎$8QxޟU G"k0Ub|'A5:u|u,1_ /ω2Ҽg{p?>=! 0O7"#"FTE:f18:8aۋ^ǺAͽ;Cfj웟p\0݁>N" .8Lmn\:1r(&½%x(U>r`KY!!|;v D 6j\ex4[&b?į->h T' K#y[2/ TN?qU5'.eJ1%:!h-74$")83bw_ Ad7^0٥<$W7 _HJ}}qO4F<"6[`ZCu:ϥN:nԨo-]<5=SY'/~|;佫