# Fuzzing > Fuzzing or fuzz testing is an automated software testing technique that involves providing invalid, unexpected, or random data as inputs to a computer program. The program is then monitored for exceptions such as crashes, failing built-in code assertions, or potential memory leaks. ## SPIKE > [SPIKE](https://github.com/guilhermeferreira/spikepp) is a protocol fuzzer creation kit. It provides an API that allows a user to create their own fuzzers for network based protocols using the C++ programming language. The tool defines a number of primitives that it makes available to C coders, which allows it to construct fuzzed messages called “SPIKES” that can be sent to a network service … ### Related [An Introduction to Fuzzing: Using fuzzers (SPIKE) to find vulnerabilities](https://resources.infosecinstitute.com/intro-to-fuzzing/) ### Basic uage test.spk ``` s_readline(); s_string_variable("COMMAND"); ``` ```bash generic_send_tcp test.spk 0 0 ``` --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://d4rk1337.gitbook.io/the-pentesters-cheat-sheet/enumeration/05-fuzzing.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.