The default port on which Jenkins starts is [22] recheck a)8080 b)80 c)9080 d)None of the above

Step 1: Break Down the Problem

To determine the correct default port for Jenkins, we need to review general knowledge about Jenkins and its standard configuration settings.

Step 2: Relevant Concepts

• Jenkins is a popular open-source automation server often used for continuous integration and continuous delivery (CI/CD).
• The official documentation or typical installations usually specify the default port settings.

Step 3: Analysis and Detail

Jenkins, by default, runs on port 8080. Here's a breakdown of the provided options:

1. 8080 - This is the default port for Jenkins.
2. 80 - This port is commonly used for HTTP but is not the default for Jenkins.
3. 9080 - This is not the standard port for Jenkins.
4. None of the above - Since the correct answer is part of the options, this is incorrect.

Step 4: Verify and Summarize

By verifying against official Jenkins documentation and common installations, it’s confirmed that the default port is indeed 8080.

Final Answer

The correct answer is: a) 8080.