Anti-spyware is the endpoint security solution designed to protect against malicious software specifically created to invade a device and collect user data. Anti-virus software, on the other hand, broadly protects against various types of malicious software, including viruses, but anti-spyware focuses particularly on spyware, which is designed to gather user information without their knowledge. Sandboxing and software-defined wide-area networks are not protective solutions for this specific type of threat.