Network discovery is the process of locating all devices, equipment and resources within a network. It allows network administrators to map out all the devices located within the network, including routers, servers, printers, workstations, and other attached devices.

Network discovery is an essential function of network infrastructure management, as it allows administrators to evaluate network performance and identify security threats. It provides administrators with an overview of the network, helping them to maintain documentation and keep track of network resources.

The process of network discovery involves scanning the network for devices and services that are connected to it. This can be done either manually or through automated tools, such as network scanners or discovery protocols.

Manual discovery involves walking around the network and taking inventory of all the devices that are connected to it. This process can be time-consuming and tedious, especially for larger networks with numerous devices.

Automated discovery, on the other hand, can be much more efficient since it does not require physical access to every device on the network. It is usually done through a network scanner, which searches for devices by their IP addresses, MAC addresses or other unique identifiers.

There are different types of network discovery protocols available, including SNMP (Simple Network Management Protocol) and UPnP (Universal Plug and Play). SNMP is used to manage and monitor network devices and systems, while UPnP is used for discovering and connecting devices in a network.

Network discovery also plays an important role in network security. By keeping track of all devices within the network, administrators can quickly identify and track down any unauthorized devices or users trying to access the network. It helps in preventing security threats and breaches, by quickly identifying and isolating any compromised devices.

In conclusion, network discovery is an essential part of network management and security. It allows network administrators to identify and troubleshoot issues within the network, and maintain a clear, organized view of network resources. By keeping track of devices within the network, administrators can implement security protocols to protect the network from unauthorized access and security breaches.