1.4 Relationship to Other Protocols
A NetBIOS name may or may not be derived from an Internet host name. The syntax for an Internet host name is much more constrained than the syntax for an arbitrary NetBIOS name. Therefore, it is possible to derive a NetBIOS name from a given Internet host name, but not necessarily vice versa.
The NetBIOS name service is used to resolve names within a local subnet, and is also used to resolve names within a larger network using an NBNS. However, it is only defined for IPv4. As such, its use for name resolution has largely been superseded by newer protocols, such as the Link-Local Multicast Name Resolution (LLMNR) Protocol [RFC4795] and the Domain Name System (DNS) [RFC1035].