This message was posted on behalf of Intel Corporation
In regard to your first question, In fact the idea is pretty much the same, however Intel® Burst technology basically is to provide on-demand higher performance for very short intervals of time in small device form factors, is a feature of low-end Intel processors (low-cost Pentiums, Celerons, those in the Atom series) that also allows the processor to run at a higher clock speed than advertised, but only for a short period of time. This is usually activated automatically when the CPU is on a high load.
Intel® Turbo Boost Technology allows processor cores to run faster than the base operating frequency if they are operating below power, current, and temperature specification limits on desktop and mobile platforms, is a feature of some high-end Intel processors that allows the processor to run at a higher clock speed than advertised as long as the processor is below its thermal limits.
Since both of them are basically almost the same, the burst frequency does not depend on turbo boost to work or vice versa, is just that depending on the processor you are using the name will be different.
The overclocking is not mandatory, actually Intel provide the option for customer to try it, but it is not recommended, it is not supported and it is not cover under warranty, as you can confirm on the following link, please read below:
Any questions, please let me know.