Q:

How to achieve redundancy with layer 2 switches only in network?

I am trying to find out way to make network design with only simple un-rooted switches which avoid redundancy!
I use 2 computers & 2 simple switches each switch connect to one pc & between both switch I connect 2 wires for check redundancy. But as simple switches always broadcast all packets to all ports except receivers port. So I can't achieve redundancy.
I try with straight wire & cross wire also between 2 switches.
I got solution that by using layer 3 switch I can achieve redundancy but I want to be sure is there no way to achieve this with the help of layer 2 switches ie simple low cost switches.

A:

Whether you have L2 or L3 switches is not relevant to this discussion. What you need is gear that supports spanning tree. 
Unfortunately dumb switches don't support spanning tree, so you are likely going to need to purchase some new equipment. 

