I am studying for the CCNA and I touched on the topic of star (client-server) vs mesh (p2p) networks. I read in some articles that one of the advantages of a mesh network is the level security and privacy it provides, but did not mention the same for the star networks. It was more of a stated fact, rather than an explanation, so I was wondering if one of these network topologies is really less secure than the other.
Could someone please explain if there is in fact a more secure/private network topology. If the answer is yes, please give some reasoning as to what makes each one more/less secure.
EDIT: My thoughts about security/privacy is regarding what packets can be seen across the network. In a star topology, packets are sent through the router, and you can sniff these packets using wireshark even if they are not intended for your machine.
Using a mesh topology, is data still being broadcasted for all machines to see? Here is a situation: there are 3 nodes in this mesh network. Each node has a direct connection to eachother. My machine is node 1. Node 2 wants to send information to node 3. Instead of going through the router, and the packets being visible to the whole network like in a star setup, can node 2 send information privately to node 3, without my machine being able to see what information was sent over wireshark? Hope this is a better, more generic example.