Final answer:
A sandbox is the system used to contain and monitor attackers by providing a secure, isolated environment where suspicious code can run safely without affecting the host system.
Step-by-step explanation:
The type of system used to contain an attacker to allow them to be monitored is known as a sandbox. A sandbox is a security mechanism for separating running programs, usually in an effort to mitigate system failures or software vulnerabilities from spreading. It is used to execute suspicious code without risking harm to the host device or network. Unlike a white box, network jail, or a VLAN, the sandbox provides a controlled environment where activities can be analyzed without exposing the system to risks. It is often used in cybersecurity to analyze unknown or potentially harmful software.