Consider the bandwidth of the line is 1.2 Mbps, packet size is 1 KB and round-trip time is 50 msec. What is the link utilization in stop and wait? a) 10.8% b) 14% c) 12% d) 13.5%
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- A TCP connection is established through 10 wireless hops in an acoustic underwater ad hoc network. Assume that each hop is 100 meter in the average, acoustic signals travel 1500 meter per second, 10 kilobit data can be sent per second over a link, the source node has one megabyte of data to send, the receiver window size is 64 kilobytes, the maximum segment size is 1 kilobyte and the average processing delay for routing at each node is one millisecond. Assume also that the following segments do not reach the destination: 67, 112, 137. What would be the average utilization of the links for this connection if there is not another communications through them? Explain an alternative approach to increase the bandwidth utilization?14. The link length is 2000km, the data transmission rate is 1kbit/s, and the data that needs to be sent is 100bit. The data propagation rate on this link is 2x10 m/s. Suppose we can see the bits transmitted on the link, try to draw the bits on the line we see: a) When 100bit is just sent. b) After another 0.05sIf a multi port bridge was used in a heavy load standard Ethernet network such that the traffic is not going through it. If the total number of stations in the LAN is 40 and the number of collision domains is 4 with equal number of stations in each domain, then each station will theoretically be given a capacity in Mbps :equals to
- part 1: Suppose value of K is 1 (Ethernet CSMA/CD), compute backoff time when link capacity (data rate) is: 10 kbps 100 kbps part 2: Suppose a frame (F) experiences collision forth time on a shared Ethernet link of I Mbps: What is the maximum possible value of K in this case Suppose maximum value of K is taken, compute backoff bit time for frame F Convert bit time into absolute time (second or fraction of a second) part 3: Suppose two hosts (Host-A and Host-B) are connected through a shared Ethernet bus of 1 Mbps. The distance between two nodes is 5 meters. The signal propagation speed over physical media is 2.5 x 10^5 meters/second. Compute the…Computer Networks Problem In the CSMA/CD protocol, the network adapter waits K-512 bit times after a collision, where K is drawn randomly. For K=20, how long does the adapter wait until returning to Step 2 for a 10 Mbps broadcast channel?Consider a network with a ring topology, link bandwidths of 100 Mbps, and propagation speed 2 × 108 m/s. What would the circumference of the loop be to exactly contain one 1500-byte packet, assuming nodes do not introduce delay? What would the circumference be if there was a node every 100 m, and each node introduced 10 bits of delay?
- A frame of 1200 bytes travel through five switches along the path. Each link has a bandwidth of 100 Mbps, a length of 100 m, and a propagation speed of 2 × 10*8 m/sec. Assuming a queuing and processing delay of 2 ms at each switch, what is the approximate end-to-end delay for this packet?A link has a transmission speed of 106 bits/sec. It uses data packets of size 1000 bytes each. Assume that the acknowledgment has negligible transmission delay, and that its propagation delay is the same as the data propagation delay. Also assume that the processing delays at nodes are negligible. The efficiency of the stop- and-wait protocol in this setup is exactly 25%. The value of the one-way propagation delay (in milliseconds) isIf a two port bridge was used in a heavy load standard Ethernet network such that the traffic is going through it. If each station is theoretically given a capacity of5Mbpsand the number of stations in each LAN segment is equal, then the number of stations in each LAN is:
- In a network, two systems are connected and the distance between the system is 5000 km. The propagation speed of the medium is 2 x 107 m/s. The bandwidth of the network is 500 MBps. If the average packet size is 108 bits and the network is used to its full capacity. The minimum size of the sequence number field is n bits. The processing delay at nodes is 0 ms. What is the value of n in case of Go-Back-N sliding window protocol?A communication satellite orbits the earth at distance of 30000 miles with each mile having a propagation speed of 5 x 10^(-6) seconds. The data rate of the satellite link is 1 Mb/s. Suppose a data frame is 1250 bytes and that ACKs have negligible processing and transmission times. With the Stop-and-Wait protocol, what is the maximum utilization possible.Discuss ways in which the utilization can be improved. Remember that the satellite is far away and therefore outline the disadvantages to any scheme you propose that may improve the utilization.Q4: What is the total delay (latency) for a frame of size 6 million bits that is being sent on a link with 5 routers each having a queuing time of 5 µs and a processing time of 2 µs. The length of the link is 3000 Km. The speed of light inside the link is 2 x 1018 m/s. The link has a bandwidth of 10 Mbps. Which component of the total delay is dominant? Which one is negligible?