This may take the form of sending a series of packets with certain characteristics before a port will be opened that the adversary can use for command and control.
Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request. ### Instruction: List the MITRE techniques contained in the text. ### Input: This may take the form of sending a series of packets with certain characteristics before a port will be opened that the adversary can use for command and control. ### Response: T1205.