If 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:
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If 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:
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- As another example, consider a circuit-switched network that connects computers in two remote offices of a private company. The offices are connected using a T-1 line leased from a communication service provider. There are two 4 × 8 (4 inputs and 8 outputs) switches in this network. For each switch, four output ports are folded into the input ports to allow communication between computers in the same office. Four other output ports allow communication between the two offices. Figure shows the situationIf 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 toA 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?
- 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 the subnet of Fig. 5-13(a). Distance vector routing is used, and the following vectors have just come in to router C: from B: (5, 0, 8, 12, 6, 2); from D: (16, 12, 6, 0, 9, 10); and from E: (7, 6, 3, 9, 0, 4). The measured delays to B, D, and E, are 6, 3, and 5, respectively. What is C's new routing table? Give both the outgoing line to use and the expected delay. В 2 4 3 A D 1 5 6. E 8 (a) Fig. 5-13(a) 3.IN PYTHON Given the following six-node wide area network for which the numbers attached to the links are a measure of the “delay” in using that link (e.g., some lines could be more heavily used than others and therefore have a longer wait time), answer the following question. What is the shortest path from node A to node D, where shortest path is defined as the path with the smallest sum of the delays on each individual link? Explain exactly how you went about finding that path.
- Consider the subnet in Fig. 3.11.5. Distance vector routing is used and the following vectors have just come in to router C: from B (5, 0, 8, 12, 6, 2); from D(16, 12, 06, 0, 9, 10) and from E(7, 6, 3, 9, 0, 4). The measured delays to B, D and E are 6, 3 and 5 respectively. What is C's new routing table? Give both the outgoing line to used and the expected delay ? A B E Fig. 3.11.5 F DQ4: Draw a graph for TCP congestion control for both a) TCP Tahoe b) TCP Reno based on the following information. Also show SS, AI and MD phases on the graph. At round 1 CWND =1 MSS Initial ssthresh =Infinity Timeout = At round 7 3 Duplicate ACK = At round 15 3 Duplicate ACK = At round 22 Add X round after 22, where X is 1part 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…
- 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)A 1-km-long, 10-Mbps CSMA/CD LAN (i.e., Classic Ethernet)has a propagation speed of 200 m/μsec (i.e., how fast the radio signal moves on the link). Thereare no repeaters in this system. Data frames are 512 bits long, including 480 bits of payload (i.e.,effective data) and 32 bits of overhead (e.g., header, checksum, and other overhead fields). Everydata frame should be confirmed by a 64-bit ACK frame. We assume the sender needs to use onecontention slot to seize the channel before transmitting the data frame, and the receiver needsto use one contention slot to seize the channel before transmitting the ACK frame. Answer thefollowing questions: a. What is the minimum length of a contention slot in μsec? b. What is the effective data rate for the sender to send one data frame? Assume that there areno collisions. Show the calculation c. What would be the impact on the total delay and the effective data rate if we used a longerdata payload size in the data frame? Given one application…Assume that the TCP Round Trip Time (RTT) is currently 28 msec and the following ACK's come in after 29, 33, 22 ms respectively. What is the new estimate RTT (ms) using Jacoboson's algorithm (a=0.8).