计算机网络作业5-9章参考答案

_=1,2,3,…123I1i2i122i1i22i12i12i1k1kkPk[12k1]∏2i1(1≤i≤k-1)Pk[12k1][20×21×22×…2k2][12k1]2k1k2/2I∑k×Pk1≤k≤∞31kmCSMA/CD1Gb/s200000km/s×2×2×/1km1÷2000005×106s5µs210µs10×106/1×109100001000012504PPT10Base5512bit?0.77cc500m_*=2t×K51.2µs×10Mb/s512bit5715412802.3LAN3171747×1511047154∑∑[(i-4)2+(j-8)2]1/21832mi=1j=12802.3LAN56m24m4×656×724416m(3)11151157171214256+52+44+36+40+48+56+20+12+4+8+16+24+442+1221/2≈466m5648402012436816244452561715715111_(5,0,8,12,6,2)D(16,12,6,0,9,10)E(7,6,3,9,0,4)CBDE6,35CC1CCBB6C0DD3EE52)B5081262CCCAB11BB6C0DD3EE5FB8_()8×50400b2400×2800b/s800b/s4DijkstraA1SU2AS{B2C3D4E5F6G7H8I9J10}R112345678910-230000000D112345678910-84∞∞∞∞∞∞∞RDusuvCD(u)Weight(u,v)CD(v)v13C{2,4,5,6,7,8,9,10}3,13,43,53,91sC=4+1=5C=4+4=8C=4+7=11CD(4)=∞CD(5)=∞CD(9)=∞24D{2,5,6,7,8,9,10}4,24,34,5C=5+2=73sC=5+2=7CD(2)=∞CD(5)=∞32B{5,6,7,8,9,10}2,11s_=7+4=11CD(6)=∞45E{6,7,8,9,10}5,35,65,65,73s4sC=7+4=11C=7+2=9D(6)CCD(7)=∞57G{6,8,9,10}7,57,87,95s()C=9+1=10C=9+1=10CD(8)=∞CD(9)=1168H{6,9,10}8,68,78,10C=10+3=137sC=10+5=15D(6)CCD(10)=∞79I{6,10}9,39,79,103s7sC=10+5=15CD(10)=1886F{10}6,26,56,82.5.8s()910J{}10,810,98.9s()111--2373344355376311739831093101031556_≤kk+12k2k7P--12311231p2p(p1)31p23L1×p2p(p1)31p2p23p3p23p3p03p110p121p2a1p21aa1a2a…Ta21aa31a2a…[a/(1a)][1a21a231a3…]∑kqkq/(1q)2(1=k∞)T[a/(1a)]×[(1a)/[11a]2]1/a1/(1p)21/(1p)23HL×Tp23p3/(1p)21IPB1620BB218218262144012621422C22Fl582IPIP194.47.21.130_“ARP”ARPIPHDLCPPP5IPIPIP811IP6IP433IP6ƒ1TCP2Socket3TCPTCP/IPTCPsyn(syn=j)SYN_SEND_=j+1SYNsyn=kSYN+ACKSYN_RECVSYNACKACK(ack=k+1)ESTABLISHED41P2QTCP1P2Q5TCP65515TCPIP65535TCP2065515TCP6TCP1Gb/s6553510ms10ms×220ms20ms501000ms÷20ms5065535×8×5026.214Mb/s26.214Mb/s÷1000Mb/s≈2.626.214Mb/s2.6.7UDPIPIPIPIPUDP8TPDU128TPDU308TPDUTPDU30s30TPDU256256×128×8÷308738b/s8.738kb/s96475Tb/s(1012)75Tb/s64TCP_×101975÷89.37575Tb/s9.375×10122×1019÷9.375×1012≈2×1062×10686400s75Tb/s2×106÷86400≈233101Gb/sMAN20kmIK200km20km100µs200µs1kB1024×881928192200µsW18192W200×106W200×106÷81921/W8192÷200×106≈40×10640Mb/s.11TCP256kb/s128ms128kb/sPDU256ms128ms×2X256ms256ms128kb/s[8X÷256×1000][256×0.001]256msX256×1000×256×0.001÷8256×32819212Etheareal3OSIOSIMFAManagementFunctionalAreaFaultManagementAccountingManagementConfiguarationManagementPerformanceManagementSecurityManagementMFAMFA_“”SNMPmanagerSNMP5SNMPUDPTCPSNMP/SNMPSNMPUDP6TCP/IPOSI7-89IPIP10NVTDOSctrl+zUNIXctrl+dTELNETnetworkvirtualterminal,NVTTELNETNVTTELNETNVT11