Which of the following storage technologies connects by TCP/IP and is separate from the company's LAN?

A tape library is an archival storage solution and while it might have management interfaces that use TCP/IP, the primary data path for tape is often Fibre Channel or SAS, and it does not fit the description of a primary storage technology that is separate from the LAN and connects solely by TCP/IP for its main function.

NAS (Network Attached Storage) connects directly to the company's existing LAN via TCP/IP and provides file-level access to clients; it is an integral part of the LAN, not separate from it.

An optical jukebox is an archival solution for optical media (CDs, DVDs) and, like a tape library, is not typically a primary storage technology that connects by TCP/IP and is separate from the company's LAN for its main data transfer function.

An iSCSI (internet Small Computer System Interface) SAN uses TCP/IP to provide block-level storage access over Ethernet networks. While using Ethernet, iSCSI SANs are commonly deployed on dedicated network infrastructure or isolated VLANs to separate high-performance storage traffic from regular LAN traffic, ensuring it is conceptually and often physically separate from the company's LAN.