Not sure where this 2960 in your network, if this is your access switch deploying IPS is no use here.
You need to deploy IPS in the Core network where most of the traffic passing in and out to protect network.
I suggest reading some deployment guidelines, pros and cons ( inline vs tap mode) - you need different other components to be in the network. ( at the stage we are not sure how big network you have - if you have any network diagram share, and how many endpoints or users devices ?)