Router 1 Router 2 -Host B)The links that connect the hosts and routers are Ethernet 1000Base-T and are short distance and can be ignoredin any further delay calculationsThe link between the two routers is 2000km long and are connected by a T-1 WAN link (line rate = 1.544Mbps)a single packet (size = 1500bytes) is routed from Host A to Host B through the network. The two routers, R1 and R2, introduce queuing delay of 10 msec and 8 msec, respectively.Assume the signal propagation velocity in the T-1 channel = Vp = 2 x 108m/seca)(8%) Calculate the TOTAL latency (in msec) required to send the 1500byte packet from Host A to Host Bb)(2%) Assume that four additional packets are sent after the 1st packet above. The total latency times for these four packets are 19msec, 47msec, 11msec, and 3msec. Calculate the maximum network jitter for the five packets. TDC 460 Homework 01 3 of 6
TDC-460 Fall 2015 6. (8%) Consider a WAN network with the following: frame size= 4000B. Link line rate = 10Mbps, RTT=60ms a)Calculate the throughput (in bps) for this network assuming stop and wait flow controlis utilized.b)Calculate the throughput (in bps) for this network assuming sliding window flow controlis utilized (assume a maximum of seven frames can be sent without acknowledgement)7.(10pts) An Ethernet network is illustrated below. Use the STP algorithm to eliminate switching loops to answer the questions below. Assume the link cost for 10Mbps=100, 100Mbps = 19 and 1Gbps = 4Identifythe root bridgeALL of the root ports(identify by using the bridge id – port id)ALL of the blocked ports(identify by using the bridge id – port id)P2B300P1P11Gbps100MbpsP2P2P110MbpsB400B100P110MbpsP3P3P4B600100Mbps10Mbps1GbpsP2100MbpsP1P2P3P2P1B200P3100MbpsB500 TDC 460 Homework 01 4 of 6
WS-1 MAC Ad = AWS-2 MAC Add = CWS-4 MAC Add = FWS-7MAC Add = IP12P11P21P22WS-3 MAC Add = BP23P25P14P24serverMAC Add = ESW02SW01HUBWS-8 MAC Add = HP13P15WS-5 MAC Add = GRouterMAC Add = DWS-6 MAC Add = JP268.The diagram below illustrates a network for an enterprise LAN. The network is comprised of twoEthernet switches (SW01 and SW02), one router, and one Hub device.SW01– VLAN 10: P11, P12, P13, P14, P15 VLAN 20: P13, P15SW02– VLAN 10: P21, P24, P25VLAN 20: P21, P22, P23, P26a)(6pts) Assume that the MAC forwarding tables are initially empty. For the following sequence of frame transmissions, determine whether the switch receiving the frame floods learns (creates a new entry in the MAC forwarding table) and whether it floods. TDC-460 Fall 2015
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