Final answer:
A banquet service has a set rate plus an operational charge, whereas other services like à la carte, buffet, or table d'hôte may have different pricing structures that do not typically include operational costs.
Step-by-step explanation:
The meal-type service that typically has a set rate plus an operational charge is known as a banquet service. A banquet typically entails a set menu with a fixed price that covers the cost of the food and the service. On top of this set rate, banquet services will often have an additional operational charge that covers the costs associated with the setup, staffing, and other organizational aspects of the event.
In contrast, à la carte service charges items individually and does not include an operational charge in the base price of items. Buffet service may have a set price for unlimited food from the buffet, but this is not the same as a banquet's comprehensive approach, which includes both the food and the operational aspects under a single price structure. The table d'hôte option is similar to a banquet in that it offers a set menu at a fixed price, but it usually does not include the operational costs that are typical of banquet services.