[Have video] network issues with Kubernetes YAML style agent in Jenkins Pipeline

When the build environment is started using POD YAML without Internet access, the jnlp image url is jenkins/jnlp-slave:alpine.
Pipeline execution failed because Internet cannot be accessed.
How to handle this situation?

https://kubesphere.com.cn/en/docs/devops-user-guide/how-to-use/choose-jenkins-agent/

Start with the linked choose-jenkins-agent documentation and the POD YAML setup described in the issue, focusing on the jnlp image URL used without Internet access. Reproduce the failed Pipeline execution in a network-isolated build environment and define the supported handling for that configuration.

Written by the indexing model from the issue text.