1) Open Jmeter and right click on the Test plan and add a new thread group.
2) Right click on Thread group .Add,Sampler Http Request
3) The server name or Ip is the address of the server you want the request to go to. Here for example I use google.com
(Observe the Method is GET by default. You can chose from range of options depending on what you want to do)
4) Now yo need to add a listener that would listen for a response from the google server after you have made the request.
Right click Thread Group.Listener.View Results as tree
5) Run the test plan.
You will see in the Listener that the request Succeed and see all the response header and data