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A hostname is a unique identifier assigned to a device (such as a computer or server) on a network. It is used to distinguish one device from another within a network and can be a part of the device's fully qualified domain name (FQDN) in a domain name system (DNS).

Key Features

  1. Unique Identifier: Each hostname is unique within its network, ensuring clear identification of devices.
  2. Human-Readable: Hostnames are typically easier to remember and use than numerical IP addresses.
  3. DNS Integration: Hostnames are often mapped to IP addresses via the DNS, allowing users to access devices using memorable names instead of complex numbers.


  • In this FQDN, www is the hostname.
  • server01.localnetwork: Here, server01 is the hostname within a local network.


  • Network Communication: Hostnames facilitate communication between devices in a network by providing a readable name to identify devices.
  • Web Browsing: Users type hostnames in URLs to access websites, which DNS translates to IP addresses.

A hostname is a crucial element in network management, providing a unique, human-readable identifier for devices, facilitating easy communication, and integration with DNS for efficient web browsing and network operations.

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