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Caching Behavior: Many web browsers cache 301 redirects. This means that once a user's browser encounters a 301 redirect, subsequent requests to the original URL will be automatically directed to the new URL without contacting the server. Updating Bookmarks: Browsers may update bookmarks to reflect the new URL after encountering a 301 redirect.
For example, a POST request should be repeated using another POST request. 308 Permanent Redirect This and all future requests should be directed to the given URI. 308 parallels the behavior of 301, but does not allow the HTTP method to change. So, for example, submitting a form to a permanently redirected resource may continue smoothly.
[14] [15] A timeout of zero seconds effects an immediate redirect. This is treated like a 301 permanent redirect by Google, allowing transfer of PageRank to the target page. [16] This is an example of a simple HTML document that uses this technique:
The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. [3] They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the ...
From: user@example.com: Permanent RFC 9110: Host: The domain name of the server (for virtual hosting), and the TCP port number on which the server is listening. The port number may be omitted if the port is the standard port for the service requested. Mandatory since HTTP/1.1. [17] If the request is generated directly in HTTP/2, it should not ...
Automatic proxy selection: Specify a host-name and a port number to be used for all URLs. Most browsers allow you to specify a list of domains (such as localhost ) that will bypass this proxy. Proxy auto-configuration (PAC): Specify the URL for a PAC file with a JavaScript function that determines the appropriate proxy for each URL.
List of port numbers. Add languages. Add links. Article; ... Permanent link; ... Redirect to: List of TCP and UDP port numbers;
Some operators prefer to use PURLs of type 301 (indicating that the final URI should be addressed in future requests). A PURL of type "chain" allows a PURL to redirect to another PURL in a manner identical to a 301 or 302 redirection, with the difference that a PURL server will handle the redirection internally for greater efficiency.