said by beanz5:if i am understanding correctly, i am only supposed to change the mtu setting in the Network(Home/Office) section and not to all of them?
Yes, just in Network (Home/Office).
[edit to add]not in the underlying devices.
Also, change the same setting in your Broadband Connection.
Size of packet would be whatever your research has determined to be the optimal setting. Then after you've changed the settings, you'll need to evaluate all your network services to understand the impact of the new MTU value.
Run a speed test, browse web pages, stream video, do whatever you'd normally do, keeping in mind the before and after for comparison.