1. 礼仪；社交礼节
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;Protocol is a system of rules about the correct way to act in formal situations.

2. （信息交换）协议
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;A protocol is a set of rules for exchanging information between computers.

3. 议定书；协议
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;A protocol is a written record of a treaty or agreement that has been made by two or more countries.

4. 治疗方案；科学实验计划
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;A protocol is a plan for a course of medical treatment, or a plan for a scientific experiment.

1. code of correct conduct

[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;e.g. safety protocols
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;academic protocol

2. forms of ceremony and etiquette observed by diplomats and heads of state

3. (computer science) rules determining the format and transmission of data

[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;Synonym: communications protocol