V1 16.1 Practice with Finite-State Chains: Closed System PerformanceFor the closed interactive network in Figure 16.11, there are NExp(A = 1), service time is Sprobabilities are as shown. For this network compute3 users,think time is ZExp(u = 2), and routingN = 31/21/2Figure 16.11. Closed queueing network from Exercise 16.1.(a) the exact throughput, X.(b) the exact mean response time, E [R], not including think time.(c) the asymptotic throughput for high N using operational analysis fromChapter 7.000

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Answered: For the closed interactive network in…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Q3) Consider weighted queueing scheme with three queues at the output port. The weights assigned to queues are w = 4, w = 2, and w = 1. The contents of each queue at time t1 are shown in below Figure. Assume packets are all the same size and that transmission time for each is 1 micro-second. Answer the following: c) Has queuing created jitter for each class?
5.01-3. Dijkstra's Algorithm (1, part 3). Consider the network shown below, and Dijkstra’s link-state algorithm to find the least cost path from source node U to all other destinations. Using the algorithm statement and its visual representation used in the textbook,complete the third row in the table below showing the link state algorithm’s execution by matching the table entries (a), (b), (c), (d) and (e) with their values
6.4-6. Self Learning Switches (c). Consider the network below with six nodes, star-connected into an Ethernet switch. Suppose that A sends a frame to A', A’ replies to A, then B sends a message to B’ and B’ replies to B, and then A sends to B and B replies to A. In this sequence of frame transmissions, how many frames have appeared at the interface at C'? Assume that the switch's table is initially empty. [Note: You can find more examples of problems similar to this here.]
If a network is to be regarded successful and efficient, what conditions must be met? Let's dissect them one by one and see how they stack up.
Computer Science This problem illustrates some of the difficulties facing network planners when they have to use OADMs that are constrained in what channels they can add and drop. Consider a four-node linear network with nodes A, B, C, and D in that order. We have three wavelengths lambda-1, lambda-2, and lambda-3 available. The OADMs given to us can drop two fixed channels i.e., we can put OADMs that drop either (lambda-1, lambda-2), or (lambda-2, lambda-3), or (lambda-1, lambda-3). Now consider the situation where we need to set up the following light paths – AB, BC, CD, AC, and BD. A) What OADMs would you deploy at each node? B) At a later point, the light path traffic changes and we need to replace light paths AC and BD with AD and BC. What changed would you have to make in order to support the new traffic.
5.01-2. Dijkstra's Algorithm (1, part 2). Consider the network shown below, and Dijkstra’s link-state algorithm to find the least cost path from source node U to all other destinations. Using the algorithm statement and its visual representation used in the textbook, complete the second row in the table below showing the link state algorithm’s execution by matching the table entries (a), (b), (c), (d) and (e) with their values.
P7. Examine the network fragment below. w and y are x's only neighbours. W's minimum-cost route to u (not illustrated) is 5, while y's is 6. The pathways from w and y to u and between them are not indicated. All network link costs are positive integers. 2, Give x's distance vector to w, y, and u.
Is there a magic number of components that must be present in a network for it to function optimally?Please elaborate in your own terms.
6. Let’s consider the operation of a learning switch in the context of a network in which 6 nodes labeled A through F are star connected into a switch. Suppose that (1) B sends a frame to E, (2) E replied with a frame to B, (3) A sends a frame to B and (4) B replied with a frame to A. The switch table is initially empty. Show the state of the switch table before and after each of these events. For each of these events, identify the link(s) on which the transmitted frame will be forwarded, and briefly justify your answers.
Q3) Consider weighted queueing scheme with three queues at the output port. The weights assigned to queues are w = 4, w = 2, and w = 1. The contents of each queue at time t1 are shown in below Figure. Assume packets are all the same size and that transmission time for each is 1 micro-second. Answer the following: b) Find the departure delay of each packet with respect to the previous packet in each class .
When a network satisfies what three conditions, can it be said to have achieved its desired goals? Allow me to dissect each one separately.
What are the three conditions that must be true for a network to function optimally? Give me a minute of your time and describe one to me in your own words.

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