In the context of Cisco Nexus switches, VRF (Virtual Routing and Forwarding) is used to create multiple virtual routing tables within a single switch. By using the default VRF for the scheduler job, the engineer ensures that the TFTP server, which is reachable in the global routing table, can be accessed without the need for additional VRF configuration. This simplifies the backup process and avoids potential issues with VRF-specific routing that could prevent access to the TFTP server. References: For more detailed information, please refer to the official Cisco documentation for Nexus 3000 Series Switches or the Implementing and Operating Cisco Data Center Core Technologies (DCCOR) study materials.