Look at this network fragment. w and y are x's only neighbors. W
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Look at this network fragment. w and y are x's only neighbors. W's minimum-cost path 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
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- Q1. Consider the network of Fig. 5-12(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 cost of the links from C 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 cost. A - 5 B2 C 6 E 8 F 3 7 DP7. Consider the network fragment shown below. x has only two attached neighbors, w and y. w has a minimum-cost path to destination u (not shown) of 5, and y has a minimum-cost path to u of 6. The complete paths from w and y to u (and between w and y) are not shown. All link costs in the network have strictly positive integer values. a) Give x’s distance vector for destinations w, y, and u. b) Give a link-cost change for either c(x,w) or c(x,y) such that x will inform its neighbors of a new minimum‐cost path to u as a result of executing the distance‐vector algorithm. c) Give a link‐cost change for either c(x,w) or c(x,y) such that x will not inform its neighbors of a new minimum‐cost path to u as a result of executing the distance‐vector algorithm.P7. Consider the network fragment shown below. x has only two attached neighbors, w and y. W has a minimum-cost path to destination u (not shown) of 5, and y has a minimum-cost path to u of 6. The complete paths from w and y to u (and between w and y) are not shown. All link costs in the network have strictly positive integer values. 2, Give x's distance vector for destinations w, y, and u.
- Consider Distance Vector Routing for the following three-node network where the link labels indicate the associated links costs and the nodes are marked as x, y, and z. Derive and explain how many iterations are needed to stabilize the cost from z to x, when the cost of link (y,x) changes from 7 to 100The graph abstruction of a network with a set of routers {s, v, w, x, y, z} is given in figure 1. The link costs are given in the figure. Using Dijkstra's link state algorithm suppose you want to find the shortest path from router 's' to all the other routers. Write the order in which the shortest path is found from router 's' to all the other routers. [The shortest path found in the first iteration should come first in the order and the shortest path found in the last iteration should come last in the order]Consider the network fragment shown below. X has only two attached neighbours, W and Y, with link costs as C(X,Y)=50, C(X,W)=8, C(Y,W)=4. W has a minimum-cost path to destination U (not shown) of 20, and Y has a minimum-cost path to U of 30. The complete paths from W and Y to U are not shown. All links in the network have strictly positive integer values. The network runs a distance vector routing algorithm (without poisoned reverse). Answer the following questions: What is the distance vector of X to destination U,DX(U)= ________ Suppose the link cost between X and Y decreases to 2.In response to the link cost change, the distance vector of X to destination U is updated to:DX(U) = _________ Suppose the link cost between W and X increases to 60 (link (X,Y) still has cost of C(X,Y)=50).Immediately after this cost increase, the distance vector of W to destination X will be updated to;DW(X) = __________Node W will then send routing updates to all its neighbours about this…
- The graph abstruction of a network with a set of routers {s, v, w, x, y, z} is given in figure 1. The link costs are given in the figure. Using Dijkstra's link state algorithm suppose you want to find the shortest path from router 's' to all the other routers. Write the order in which the shortest path is found from router 's' to all the other routers. [The shortest path found in the first iteration should come first in the order and the shortest path found in the last iteration should come last in the order] 3 V W 8 9. S 7 6 5.8. Consider the 6-node network shown below, with the given link costs. Using Dijkstra's algorithm, find the least cost path from source node U to all other destinations: u 8 9 6 6 V X 9 W 6 D Z a. What is the shortest distance to node w and what node is its predecessor? Write your answer as n,p b. What is the shortest distance to node v and what node is its predecessor? Write your answer as n,p c. What is the shortest distance to node y and what node is its predecessor? Write your answer as n,pDIJKSTRA'S LINK STATE ALGORITHM (FOR COMPUTING LEAST COST PATHS) Consider the 6-node network shown below, with the given link costs. 5 QUESTION 1 OF 3 5 2 1 X 7 6 6 W 6 Using Dijkstra's algorithm, find the least cost path from source node U to all other destinations and answer the following questions What is the shortest distance to node v and what node is its predecessor? Write your answer as n,p Z
- Consider the following network. With the indicated link costs, use Dijkstra's shortest-path algorithm to compute the shortest path from c to all network nodes. a) Show how the algorithm works by computing a table like the one discussed in class. b) Show all the paths from c to all other network nodes. 33 4 27 Start 24 8 A 5 3 F 9 10 E 10 3 DConsider 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.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.