 LLDP performs functions similar to several proprietary protocols, such as Cisco Discovery Protocol, Foundry Discovery Protocol, Nortel Discovery Protocol and Link Layer Topology Discovery.Information gathered with LLDP can be stored in the device management information database (MIB) and queried with the Simple Network Management Protocol (SNMP) as specified in RFC 2922.The topology of an LLDP-enabled network can be discovered by "crawling" the hosts and querying this database.