Which methodology would be used to present a SAN hosted LUN to only a single host?

LUN masking is a crucial methodology used in storage area networks (SAN) to control which hosts are able to access specific Logical Unit Numbers (LUNs). By implementing LUN masking, administrators can effectively present a LUN to only a designated single host, ensuring that access is limited and secure. This is particularly pertinent in environments where multiple hosts may be connected to the same SAN, as it prevents unauthorized access to data and helps maintain data integrity.

LUN ID assignment, while related to the identification of LUNs, does not control which hosts can access them but rather designates the unique identifiers for the LUNs themselves. Port mapping, on the other hand, refers to the configuration that determines how a host communicates with specific storage resources, which does not restrict access to LUNs by particular hosts. Port zoning is a security technique used to control access at the port level within the fabric of the SAN, but it does not directly address the issue of presenting a LUN to just one host.

Therefore, LUN masking is the most effective method for ensuring that a LUN is presented solely to a single host, protecting the data and maintaining appropriate access controls.