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- 32. Consider the following S1 and S2 :S1 : A hard handover is one in which the channel in the source cell is retained and used for a while in parallel with the channel in the target cell.S2 : A soft handover is one in which the channel in the source cell is retained and only then the channel in the target cell is engaged. a. S1 is true and S2 is not true b. S1 is not true and S2 is true c. Both S1 and S2 are true d. Both S1 and S2 are not trueComputer Science Two flows are transmitting at a constant rate of 4Mbps and 8Mbps and compete for service at a 10Mbps link. If the link adopts an RED policy, what is the expected drop probability for each flow?Computer Networks Which of the following statements is true of loop detection in BGP. The underlying algorithm used (a modification of Bellman-Ford) guarantees a loop-free solution. Because BGP uses policies that might not select the shortest path, loops must be identified and pruned during path selection. To fix this routers will scan the AS_PATH looking for their own AS, and reject any routes that include themselves. BGP does not guarantee loop-free routing, which is why the TTL/HopCount field must be included in the IP header.
- Let A and B be two stations attempting to transmit on Ethernet. Each has a steady queue of frames ready to send. A's frames will be numbered A₁, A₂ and so on, and B's similarly. Let T= 51.2 µs be the exponential backoff = base unit. Suppose A and B simultaneously attempt to send frame 1, collide, and happen to choose backoff times OxT and 1xT, respectively, meaning 'A' wins the race and transmits A₁, while B waits. At the end of this transmission, B will attempt to transmit B, while A will attempt to transmit A₂. These first attempts will collide, but now A backs off for either OxT or 1xT while B backs off for time equal to one of OxT......3xT. Give the probability that A wins the second backoff race.Q4: 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 1Choose the correct statment(s) from the following. A. It is possible to design a broadcast algorithm for ring interconnect network with time complexity O(logp)O(logp), where p is the number of nodes in the ring. B. The time complexity of broadcast in bus interconnect network is O(1)O(1). C. It is possible to design a broadcast algorithm for hypercube interconnect network with time complexity O(logp)O(logp), where p is the number of nodes in the ring. D. The time complexity of broadcast in ring interconnect network is O(1)O(1).
- Which of the following statements is true of loop detection in BGP. - The underlying algorithm used (a modification of Bellman-Ford) guarantees a loop-free solution. - Because BGP uses policies that might not select the shortest path, loops must be identified and pruned during path selection. To fix this routers will scan the AS_PATH looking for their own AS, and reject any routes that include themselves. - BGP does not guarantee loop-free routing, which is why the TTL/HopCount field must be included in the IP header.In a pure Aloha network with G = 1/2, how is the throughput affected in each of the following cases? a. G is increased to 1. b. G is decreased to 1/4.Pure ALOHA is used in a network with Poisson distributed traffic. The success probability, as defined in this given with P(successful access) = 0.05.a) How large is the normalised channel access rate G, and the normalised success rate S (alsosometimes called throughput)?b) From now, the maximum data rate C is considered with C = 96 kbit/s = 96·103 bit/s. Allpackets that are transmitted have a size of 64 byte and every sender in the network sends3 packets per minute on average. What is the average access rate g1 of a single sender?What is the average access rate g and the normalised access rate G on the channel if there are 50, 500, and 5000 senders connected?c) With the same values of part (b) above, what are the normalised success rates S50, S500, S500in the case of 50, 500, and 5000 senders?
- In the communication in the figureFor Link 1; Bandwidth 150 Mbps Line Length 5 km For Link 2; Bandwidth 50 Mbps Line Length 2000 km For Link 3; Bandwidth 1000 Mbps Line Length 1 km For 4000 bit packet length and the case where fiber optic and light speed of all connections are 3x10^8 m / sec; Question 2. Assuming there are no queue and processing delays, calculate the end-to-end delay in milliseconds.If there are x number of devices that are wanting to transmit during a slotted Aloha protocol, what value of access probability (p) will maximize the amount of total throughput for the system? Also what happens to the value of throughput as the number of devices approaches infinity?Don't copy from chegg need plag free answer Compare FDMA, TDMA, and CDMA.