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Лабораторна робота №2 з дисципліни “Комп’ютерні мережі”
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| Завдання на виконання: 1. На каком уровне сосредоточены отличия технологий Ethernet и Fast Ethernet? 2. Какая топология сети применяется в технологии Ethernet ? На каких уровнях модели OSI работает Ethernet? 3. Множественный доступ с контролем несущей и обнаружением коллизий (CSMA/CD, Carrier Sense Multiple Access with Collision Detection) что это такое? 4. Формат кадра стандарта Ethernet? 5. Принцип работы коммутатора? 6. Принцип работы концетратора? 7. Для какого стандарта Ethernet применяется правило "4-х хабов" ?Почему? 8. Протокол ARP. Настроювальні параметри package inet.examples.ethernet.lans; import inet.linklayer.ethernet.EtherBus; import inet.linklayer.ethernet.EtherHub; import inet.nodes.ethernet.EtherHost; import inet.nodes.ethernet.EtherHost2; import inet.nodes.ethernet.EtherSwitch; import inet.nodes.ethernet.EtherSwitch2; import inet.world.ChannelInstaller; import ned.DatarateChannel; network MixedLAN { submodules: channelInstaller: ChannelInstaller { parameters: channelClass = "ThruputMeteringChannel"; channelAttrs = "format=#N"; @display("p=75,52"); } bus: EtherBus { parameters: positions = "10 20 24 35 40 48"; propagationSpeed = 2e8 mps; // 1us = 200m @display("p=277,182;b=424,6;o=#408060"); gates: ethg[3]; } busHostB: EtherHost { parameters: @display("p=210,118"); } switchHostB: EtherHost { parameters: @display("p=162,300"); } switch: EtherSwitch { parameters: @display("p=194,236"); gates: ethg[2]; } hubHostB: EtherHost { parameters: @display("p=365,55"); } hub: EtherHub { parameters: @display("p=362,132"); gates: ethg[2]; } connections: bus.ethg[0] <--> busHostB.ethg; bus.ethg[1] <--> switch.ethg[0]; bus.ethg[2] <--> hub.ethg[0]; switch.ethg[1] <--> { delay = 0.1us; } <--> switchHostB.ethg; hub.ethg[1] <--> { delay = 0.3us; } <--> hubHostB.ethg; } Скалярні дані version 2 run MixedLAN-0-20131126-23:41:41-4488 attr configname MixedLAN attr datetime 20131126-23:41:41 attr experiment MixedLAN attr inifile mixed.ini attr iterationvars "" attr iterationvars2 $repetition=0 attr measurement "" attr network MixedLAN attr processid 4488 attr repetition 0 attr replication #0 attr resultdir results attr runnumber 0 attr seedset 0 scalar MixedLAN.bus "simulated time" 120.01368167708 scalar MixedLAN.bus "messages handled" 0 scalar MixedLAN.bus messages/sec 0 scalar MixedLAN.busHostB.cli "packets sent" 129 scalar MixedLAN.busHostB.cli "packets rcvd" 394 scalar MixedLAN.busHostB.cli "end-to-end delay mean" 0.0028728708111827 scalar MixedLAN.busHostB.cli "end-to-end delay stddev" 0.0016262155789547 scalar MixedLAN.busHostB.cli "end-to-end delay min" 9.9829999e-005 scalar MixedLAN.busHostB.cli "end-to-end delay max" 0.008970789999 scalar MixedLAN.busHostB.srv "packets sent" 0 scalar MixedLAN.busHostB.srv "packets rcvd" 0 scalar MixedLAN.busHostB.srv "end-to-end delay mean" 0 scalar MixedLAN.busHostB.srv "end-to-end delay stddev" -1.#IND scalar MixedLAN.busHostB.srv "end-to-end delay min" 0 scalar MixedLAN.busHostB.srv "end-to-end delay max" 0 scalar MixedLAN.busHostB.llc "dsaps registered" 2 scalar MixedLAN.busHostB.llc "packets from higher layer" 128 scalar MixedLAN.busHostB.llc "frames from MAC" 394 scalar MixedLAN.busHostB.llc "packets passed up" 394 scalar MixedLAN.busHostB.llc "packets dropped - unknown DSAP" 0 scalar MixedLAN.busHostB.mac "simulated time" 120.01368167708 scalar MixedLAN.busHostB.mac "txrate (Mb)" 10 scalar MixedLAN.busHostB.mac "full duplex" 0 scalar MixedLAN.busHostB.mac "frames sent" 128 scalar MixedLAN.busHostB.mac "frames rcvd" 918 scalar MixedLAN.busHostB.mac "bytes sent" 90512 scalar MixedLAN.busHostB.mac "bytes rcvd" 1106377 scalar MixedLAN.busHostB.mac "frames from higher layer" 128 scalar MixedLAN.busHostB.mac "frames from higher layer dropped (iface down)" 0 scalar MixedLAN.busHostB.mac "frames dropped (bit error)" 0 scalar MixedLAN.busHostB.mac "frames dropped (not for us)" 524 scalar MixedLAN.busHostB.mac "frames passed up to HL" 394 scalar MixedLAN.busHostB.mac "PAUSE frames sent" 0 scalar MixedLAN.busHostB.mac "PAUSE frames rcvd" 0 scalar MixedLAN.busHostB.mac "frames/sec sent" 1.0665450656235 scalar MixedLAN.busHostB.mac "frames/sec rcvd" 7.6491278925188 scalar MixedLAN.busHostB.mac "bits/sec sent" 6033.4454362323 scalar MixedLAN.busHostB.mac "bits/sec rcvd" 73750.058129336 scalar MixedLAN.busHostB.mac "rx channel idle (%)" 99.196586933651 scalar MixedLAN.busHostB.mac "rx channel utilization (%)" 0.80341306634889 scalar MixedLAN.busHostB.mac "rx channel collision (%)" 0 scalar MixedLAN.busHostB.mac collisions 0 scalar MixedLAN.busHostB.mac backoffs 0 scalar MixedLAN.switchHostB.cli "packets sent" 0 scalar MixedLAN.switchHostB.cli "packets rcvd" 0 scalar MixedLAN.switchHostB.cli "end-to-end delay mean" 0 scalar MixedLAN.switchHostB.cli "end-to-end delay stddev" -1.#IND scalar MixedLAN.switchHostB.cli "end-to-end delay min" 0 scalar MixedLAN.switchHostB.cli "end-to-end delay max" 0 scalar MixedLAN.switchHostB.srv "packets sent" 796 scalar MixedLAN.switchHostB.srv "packets rcvd" 250 scalar MixedLAN.switchHostB.srv "end-to-end delay mean" 0.000668040479 scalar MixedLAN.switchHostB.srv "end-to-end delay stddev" 0.00035503140503399 scalar MixedLAN.switchHostB.srv "end-to-end delay min" 8.2229999e-005 scalar MixedLAN.switchHostB.srv "end-to-end delay max" 0.001267589999 scalar MixedLAN.switchHostB.llc "dsaps registered" 1 scalar MixedLAN.switchHostB.llc "packets from higher layer" 796 scalar MixedLAN.switchHostB.llc "frames from MAC" 250 scalar MixedLAN.switchHostB.llc "packets passed up" 250 scalar MixedLAN.switchHostB.llc "packets dropped - unknown DSAP" 0 scalar MixedLAN.switchHostB.mac "simulated time" 120.01368167708 scalar MixedLAN.switchHostB.mac "txrate (Mb)" 100 scalar MixedLAN.switchHostB.mac "full duplex" 1 | |
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