Fill in the blank:
\(\_\_\_\_\_\_\_\_\) is a set of rules that needs to be followed by the communicating parties in order to have a successful and reliable data communication over a network.
Familiarize yourself with common protocols like HTTP (web communication), FTP (file transfer), and SMTP (email).
A protocol is a set of rules that defines how data is transmitted and received over a network. It ensures that communication between devices is reliable and successful. Examples of protocols include HTTP, FTP, and SMTP.
If vector \( \mathbf{a} = 3 \hat{i} + 2 \hat{j} - \hat{k} \) \text{ and } \( \mathbf{b} = \hat{i} - \hat{j} + \hat{k} \), then which of the following is correct?