Which Port Does SMTP Use for Communication

question 63

Multiple Choice

Which port does SMTP use for communication?

• A) 23
• B) 25
• C) 110
• D) 443

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Definitions:

Variable Costing

Variable costing is an accounting method that only considers variable costs (costs that change with production levels) in the calculation of product or service costs, excluding fixed costs.

Gross Profit

The difference between sales revenue and the cost of goods sold, directly indicating the efficiency of core business activities.

Absorption Costing

A method of inventory costing that includes all manufacturing costs, both variable and fixed, in the cost of a product.

Variable Costing

An accounting method that only includes variable production costs (materials, labor, and overhead) in product cost calculations, excluding fixed costs.