Consider the network fragment shown below. X W x Y X has only two attached neighbours, W and Y, with link costs as C(X,Y)=50, C(X,W)=2, C(Y,W)=2. • W has a minimum-cost path to destination U (not shown) of 7, and Y has a minimum-cost path to U of 6. 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: A. What is the distance vector of X to destination U, Dx(U)= | to; B. 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) = C. 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 Dw(X) = Node W will then send routing updates to all its neighbours about this change. After receiving W's routing update, Y will update its distance vector for destination X to: Dy(x) = After the routing protocol converges, the distance vector of W to destination X will be updated to; Dw(X) =

Consider the network fragment shown below. X W x Y X has only two attached neighbours, W and Y, with link costs as C(X,Y)=50, C(X,W)=2, C(Y,W)=2. • W has a minimum-cost path to destination U (not shown) of 7, and Y has a minimum-cost path to U of 6. 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: A. What is the distance vector of X to destination U, Dx(U)= | to; B. 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) = C. 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 Dw(X) = Node W will then send routing updates to all its neighbours about this change. After receiving W's routing update, Y will update its distance vector for destination X to: Dy(x) = After the routing protocol converges, the distance vector of W to destination X will be updated to; Dw(X) =

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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