Which Metasploit module is used for no-operation instructions to block out buffers?

• A. Metasploit Exploit Module
• B. Metasploit NOPS Module
• C. Metasploit Payload Module
• D. Metasploit Auxiliary Module

Answer: (B)

NOPs are used as no-operation instructions to pad a buffer, creating a NOP sled so that if the execution flow lands anywhere in that area, it will slide into the actual payload. Metasploit provides a NOPs module specifically to generate these no-op bytes (often using the 0x90 opcode on x86) to fill buffers and improve exploitation reliability. This is distinct from exploit modules (which carry the vulnerability exploit), payload modules (which define the code to run after exploitation), and auxiliary modules (which perform assorted helper tasks). So the NOPs module is the one designed for creating the no-operation padding used to block out buffers.