the given programs are implementation of distance vector routing
protocol RIP: routing information protocol. 

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The zip folder comtains 4 java files viz. Router.java ReceivingProcess.java SendingProcess.java Hosts.java
and one text file containing the topology.
The system requires minimum Java 1.8 to run.

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To run the file:
open terminal in the same directory or put the path of the directory in 
the terminal.

Type command "Javac *.java"

if it successfully compiles, it may give some warnings ignore that.

Type command Java Router to run the program.
Follow the mentioned user input as it asks to run the program.

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Thank you.