Rust: What is the difference between std::net and tokio::net?

std::net — blocking networking. tokio::net — async networking.

std::net:

• Blocking.
• TCP, UDP.
• For sync code.

tokio::net:

• Async.
• TCP, UDP.
• For async code.

1// Blocking
2use std::net::TcpListener;
3let listener = TcpListener::bind("127.0.0.1:8080")?;
4
5// Async
6use tokio::net::TcpListener;
7let listener = TcpListener::bind("127.0.0.1:8080").await?;

Key: std::net for blocking, tokio::net for async.