Quèstion 12 In the chance of collision can be reduced if each node senses the channel before transmit. ALOHA O A. FDMA OB. Oc, TDMA
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Q: Five devices arranged in a mesh topology
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A: Answer : Five device connected in bus topology is the right answer.
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Q: In a full duplex communication by using UTP cable, Pt 120 w, Pr =11 w and NEXTdb = 13,01. According…
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A: Summary: -Hence, we have discussed all the point.
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- Consider a 50,000-customer video server, where eachcustomer watches three movies per month. Two-thirds of themovies are served at 9 P.M. How many movies does the serverhave to transmit at once during this time period? If each movierequires 6 Mbps, how many OC-12 connections does theserver need to the network?Answer the questions below with reference to Data Link Layer (max 250 words): i) A local Area Network (LAN) Medium Access Control (MAC) protocol aims to achieve fair and efficient access to a LAN transmission medium. Characterise the distinction between authorisation based (“taking turns”) and contention based (random access) MAC layer protocols and discuss the suitability of each protocol in light traffic and heavy traffic networks in terms of fairness and efficiency of access. ii) In CSMA/CD, after the fifth collision, what is the probability that a node chooses k=4. The result k=4 corresponds to a delay of how many seconds on a 10Mbps Ethernet?Consider a wireless network. For each of the following cases, state whether the packet transmission would be successful; assume no collision avoidance. Explain your answers. 2.2.2 Nodes A and B are in range of each other; nodes B and C are in range of each other; A and C are not in range of each other. C is transmitting and A wants to send a packet B
- If the answer is copy from existing solution or internet I have existing answers dont post copied answers I will surely downvote Dont answer if dont have accurate knowledge I will surely downvote sure if it is wrong or incorrect or alreadu existing solution. Answer only if have accurate knowledge. Consider two hosts, A and B, connected by a single link of rate R bps. Suppose that the two hosts are separated by m meters, and suppose the propagation speed along the link is s meters/sec. Host A is to send a packet of size L bits to host B. a. Suppose host A begins to transmit the packet at time t= 0, at time t=dtrans, where is the last bit of the packet?b. Suppose dprop is greater than dtrans. At time t =dtrans, where is the first bit of the packet? c. Suppose dprop is less than dtrans. At time t =dtrans, where is the first bit of the packet?d. Suppose s = 2.5 x 108 , L=100 bits, and R=28 Kbps. Find the distance m so that dprop = dtrans.Construct a star topology computer network for a company with ( 3 departments, 12 computers, 3 routers, 3 switches, IDS,IPS,DNS servers, DHCP servers, FTP servers, and more ) in a single builiding.A) Assume there is a wide-area network with N nodes, where N ≥ 2 What is the smallest number of point-to-point communication links such that every node in the network is able to talk to every other node? (Note: A network in which some nodes are unable to exchange messages with other nodes because there is no path between them is called disconnected.)
- Suppose nodes A and B are on the same 10 Mbps broadcast channel, and the propagation delay between the two nodes is 245 bit-times. Suppose A and B send Ethernet frames at the same time. Suppose the transmission time of the entire frame is 295 bit-times. So, the frames collide, and then A and B choose different values of K in the CSMA/CD algorithm. A node chooses the value of K at random from {0,1,2,...2n−1} where n is the number of collisions experienced on the channel – note n is set to 1 in this case). For Ethernet, the actual amount of time a node waits is K*512 bit times (i.e., K times the amount of time needed to send 512 bits into the Ethernet). Suppose A chooses a K value of 0 and B chooses a K value of 1. Assuming no other nodes are active, can the retransmissions from A and B collide? Justify your answer by showing all the intermediate steps of your calculations.Consider the fallout that may occur from the breakdown of any of the following links. i.five nodes arranged in a mesh topology II.five gadgets arranged in a star pattern (not counting the hub) thirdly, a five-device bus topology 5.five gadgets arranged in a circleQ4 Detaild answer required Consider the CAN network from Figure. How would you route a message from the node with coordinates (0.2,0.3) to the one with coordinates (0.9,0.6)?
- Consider a wireless network. For each of the following cases, state whether the packet transmission would be successful; assume no collision avoidance. Explain your answers. 2.2.1 Nodes A and B are in range of each other; nodes B and C are in range of each other; A and C are not in range of each other. Both A and C send a packet to B simultaneously. 2.2.2 Nodes A and B are in range of each other; nodes B and C are in range of each other; A and C are not in range of each other. C is transmitting and A wants to send a packet BDont copy from the source of internet or other answering sources I will dowvote for sure answer only if you have accurate knowledge otherwise receive dislike for sure Suppose users share a 2 Mbps (i.e., 2×106 bits per second) link. Also suppose each user transmits continuously only at 1 Mbps when transmitting, but each user transmits only 20% of the time.a)For the remainder of this problem, suppose packet switching is used. Why will there be essentially no queuing delay before the link if two or fewer users transmit at the same time? Why will there be a queueing delay if three users transmit at the same time?b)Note that the probability that a given user is transmitting is 0.2 (i.e., 20% of time). Suppose now there are three users. Find the fraction of time during which the queue grows.2. Now suppose there are two links between source and destination, with one router connecting the two links. Each link is 5,000 km long. Again suppose the MP3 file is sent as one packet. Suppose there is no congestion, so that the packet is transmitted onto the second link as soon as the router receives the entire packet. What is the end-to-end delay?