Creating a Network Topology Setup

Creating a Network Topology Setup in such
a way so that System A can ping to two Systems
System B and System C but both these systems should not be pinging each other. without using any security rule. Eg- firewall etc.

IP of System A:

IP of System B:

IP of System C:

Delete all the existing rules in the routing table with cmd:

route del -net <ip>/<netmask> enp0s3

Add the rule in System A, using the cmd:

route add -net 192.168.43.0/30

Modifying the Routing table of System B:

Modifying the Routing table of System C:

Now as System A Range From Ips 0 to 3 we can connect with both System B and System C:

System B route table has the range from only 0 to 1, it means we can connect to SysA but not to SysC

System Croute table has the range from only 0 to 1, it means we can connect to SysA but not to SysB