Suppose a router has the following forwarding table: Destination Address Range Link Interface 0 1 12 3 4 5 6 200.23.24.0/24 30.125.0.0/16 199.25.8.0/24 30.125.34.0/24 123.125.0.0/16 52.33.0.0/16 otherwise For the following destination addresses in the left column, identify the forwarding interface in the right column: 201.23.24.1 30.125.34.125 200.23.24.29 30.125.31.115 123.115.125.2 ✓ [Choose ] ON 56 0 2 1 4 3 [Choose ] + + +

Suppose a router has the following forwarding table: Destination Address Range Link Interface 0 1 12 3 4 5 6 200.23.24.0/24 30.125.0.0/16 199.25.8.0/24 30.125.34.0/24 123.125.0.0/16 52.33.0.0/16 otherwise For the following destination addresses in the left column, identify the forwarding interface in the right column: 201.23.24.1 30.125.34.125 200.23.24.29 30.125.31.115 123.115.125.2 ✓ [Choose ] ON 56 0 2 1 4 3 [Choose ] + + +

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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Suppose we have switches S1 through S4; the forwarding-table destinations are the switches themselves. The tables for S2 and S3 are as below, where the next_hop value is specified in neighbor form: S2: ⟨S1,S1⟩ ⟨S3,S3⟩ ⟨S4,S3⟩ S3: ⟨S1,S2⟩ ⟨S2,S2⟩ ⟨S4,S4⟩ From the above we can conclude that S2 must be directly connected to both S1 and S3 as its table lists them as next_hops; similarly, S3 must be directly connected to S2 and S4. (a). The given tables are consistent with the network diagrammed in exercise 6.0. Are the tables also consistent with a network in which S1 and S4 are not directly connected? If so, give such a network; if not, explain why S1 and S4 must be connected. (b). Now suppose S3’s table is changed to the following. Find a network layout consistent with these tables in which S1 and S4 are not directly connected. Do not add additional switches. S3: ⟨S1,S4⟩ ⟨S2,S2⟩ ⟨S4,S4⟩ While the table for S4 is not given, you may assume that forwarding does work correctly.…
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