Which role do interfaces Ethernet 1/49-50 have in this output?

In Cisco ACI, interfaces like Ethernet 1/49-50 on a leaf switch are designated as fabric ports, which are used to establish connections to spine switches. These high-speed uplinks form the crucial spine-leaf topology of the ACI fabric underlay.

Servers do not have "fabric ports"; they connect to the access ports of leaf switches.

Leaf access ports are typically lower-numbered interfaces (e.g., 1/1 through 1/48) used to connect to endpoints like servers, not the higher-numbered uplink ports like 1/49-50.

Server uplink ports refer to the ports on the server itself that connect to the leaf switch; the question asks about the role of the leaf switch's interfaces.