
some examples are Constant Timer, Constant Throughput Timer. Components presented here provide the functionality to introduce User Think Time in various forms among samplers. Timer : By default, a JMeter thread executes samplers in sequence without pausing.

User Defined variables config element allows you define variables which can be used across the Test Plan but where each Thread has its own copy.

CSV Dataset Config allows you to provide test data like usernames, passwords of Login scenario from a file. Note that these elements are usually processed at the start of the scope in which they are found, i.e. Config Element : Configuration elements can be used to set up defaults and variables for later use by samplers.
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Main stream protocols are supported, for others you can use Free or Commercial plugins. for example, HTTP sampler allows you simulate an HTTP packet (of GET, POST or any supported methods). It gives components to simulate requests of various protocols such as HTTP, JDBC, FTP, SMTP etc.

Test Plan : Starting point for scripting.Apache JMeter segregated all the components into following groups based on their functionality:
