Which technology maintains Fibre Channel virtual links between a pair of FCoE devices?

Enhanced Transmission Selection (ETS) is part of Data Center Bridging (DCB) and provides bandwidth management for different traffic classes, but it does not maintain FCoE virtual links.

FLOGI (Fabric Login) is a Fibre Channel process where a Node Port (N_Port) logs into the Fibre Channel fabric, obtaining an address, but FIP is the protocol that establishes and maintains the underlying virtual link.

Priority Flow Control (PFC) is part of Data Center Bridging (DCB) and provides a lossless Ethernet transport for Fibre Channel traffic by preventing frame loss due to congestion, but it does not maintain FCoE virtual links.

The FCoE Initialization Protocol (FIP) is crucial for FCoE environments as it handles the discovery of FCoE-capable devices, the negotiation of virtual links, and the encapsulation of Fibre Channel frames into Ethernet. FIP is responsible for establishing and maintaining the Fibre Channel virtual links (VE_ports) between FCoE devices, such as Converged Network Adapters (CNAs) and FCoE switches.