Subnetwork is a term used in computer networking to refer to a portion of a larger network that is separated or isolated from the main network by a router or switch. There are several synonyms for the term subnetwork, including subnet, network segment, LAN (local area network), VLAN (virtual LAN), and broadcast domain. All of these terms are used to describe a subset of a larger network that operates as a smaller network on its own. Synonyms such as subdomain, subzone, and branch network are also occasionally used, but these terms imply a hierarchical relationship rather than a segmented network. Regardless of the synonym used, the concept of subdividing a larger network into smaller segments is a crucial aspect of network design and management.