• HttpClient - Modern HTTP client.
• HttpRequest - Immutable HTTP request description.
• HttpResponse - HTTP response value object inspired by Python `requests.
• InetAddress - Internet host descriptor, close to Java's `java.
• InetSocketAddress - Internet socket endpoint (host + port), close to Java's `java.
• ServerSocket - TCP server socket, close to Java's `java.
• Socket - TCP client socket, close to Java's `java.
• SocketAddress - Base class for socket endpoints, close to Java's `java.
• SocketInputStream - Binary input stream wrapper for `Socket`.
• SocketOutputStream - Binary output stream wrapper for `Socket`.
• SocketReader - Text reader over one socket connection.
• SocketWriter - Text writer over one socket connection.
• TlsOptions - Immutable TLS options for HTTP clients.
• URL - Parsed URL value inspired by Java's `URL`.

• BindException - Raised when binding a server socket fails.
• ConnectException - Raised when connecting a client socket fails.
• MalformedURLException - Raised when a URL cannot be parsed.
• ProtocolException - Raised when an HTTP or URL protocol rule is violated.
• SocketException - Base network exception for socket, TCP, TLS and HTTP transport failures.
• UnknownHostException - Raised when a host name cannot be resolved.