What conclusion can be drawn if the default SVI has not been configured on a switch?

When the default Switch Virtual Interface (SVI) is not configured on a switch, it indicates that there is no layer 3 interface available for management and routing purposes. The SVI is primarily responsible for allowing management access to the switch, often through the use of an IP address assigned to it. In the absence of a configured SVI, remote management capabilities such as accessing the switch via Telnet or SSH are indeed restricted, as these protocols rely on a valid IP interface to establish a connection.

The other options do not accurately represent the implications of not configuring the default SVI. For example, the notion that all interfaces will default to the same VLAN does not occur purely due to the absence of an SVI; VLAN configurations are independent of SVI settings. The configuration state of the switch, whether it is complete or not, is not determined solely by the presence or absence of an SVI, as a switch may operate without remote management but still function normally with local terminal access. Lastly, the assertion that only physical interfaces can be accessed does not fully capture the situation since interface access is governed by the layer 2 and layer 3 configurations, and local access may still be available via console connections regardless of the SVI's status.