A, http Request Defaults
Location: Thread Group -> configuration elements -> Default HTTP Request
Role: In some of the interfaces you tested ip is the same, you can write to this ip http request defaults, play the role of multiplexing;
In addition, when these interfaces ip address is changed, then the http request directly to the content of the default values can be
Impact: If a particular http request also fill in the ip address, in order to address specific interface ip-based, similar to a local variable
Second, to see the number of results
1, json mode