Answered: PLEASE EXPLAIN REASONING FOR CHOOSING…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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PLEASE EXPLAIN REASONING FOR CHOOSING SPECIFIC CODE

We can define a directed graph by ordering its nodes and arcs. First consider a TXT file in which nodes of string type are given, followed by arcs in sequential triples and associated weights.

For example:

(C, D, 1)

(A, B, 1)

(B, D, 3)

(B, C, 0)

(A, C, 2)

The program* can read any (directional) line given in this format and

tell whether the (directed) graph contains cycles,
order the nodes of an acyclic graph topologically,
calculate the shortest distance between any two given nodes of an acyclic graph (if there is a path between these two nodes) under the assumption that arc weights are not negative. (Dijkstra algorithm)

For example, the graph given above is acyclic; topological order of nodes as A, B, C, D ; Shortest distance 1 for start node A and end node C.

*This program can be Python code or R code.

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