Join IDNLearn.com and start exploring the answers to your most pressing questions. Join our platform to receive prompt and accurate responses from experienced professionals in various fields.

In the context of HTTP requests and responses, what is the primary purpose of a header?
A. To store user credentials for authentication.
B. To specify the type and format of data being sent or received.
C. To handle real-time data streaming and synchronization.
D. To cache static content for faster loading times.