Uniform Resource Name Server

HTTP The Definitive Guide

Identity identify by address

Identify identify by name

Domain Name Server

Uniform Resource Name Server

Https://en.wikipedia.org/wiki/Ln_ (Unix)

Thelncommand is a standardUnix commandUtility used to create aHard link(LINK) or aSymbolic Link (symlink) to an existing file. ^{[1] The use of a hard link allows multiple filenames to being associated with the same file since a hard Lin K points to the inode of a given file, the data of which was stored on disk. On the other hand, symbolic links is special files, refer to other files by name. [2]}

/*

Symbolic link Soft link points to a symbolic path to another different path file

A hard link stores a copy of the actual data that the link establishes when it points to the file

When the original file is deleted, the symbolic link is invalidated, and when you access the soft link, you are prompted not to find the file, but the hard-link file is still in and the contents of the original file are saved.

*/

Uniform Resource Identifier URI Uniform Resource Identifier

Uniform Resource Locator URL Uniform Resource Locator

Uniform Resource Name URN Uniform Resource Name

A URN serves as a unique name for a particular piece of content, independent of where the resource currently resides. These location-independent urns allow resources-to-move from place-to-place.  Urns also allow resources to being accessed by multiple network access protocols while maintaining the same name. For example, the following URN might is used to name the Internet standards document "RFC 2141" regardless of where it res Ides (it may even is copied in several places):
urn:ietf:rfc:2141
Urns is still experimental and not yet widely adopted. To work effectively, urns need a supporting infrastructure to resolve resource locations; The lack of such an infrastructure have also slowed their adoption. But urns does hold some exciting promise for the future.

Uniform Resource Name Server