NBNS

NBNS (sometimes called WINS) stands for NetBIO Name Service, which is a protocol for name resolution.

NBNS performs the same function as LLMNR, but using UDP broadcast packets instead of multi cast packets. Browsers normally only attempt to use NBNS after attempts to use LLMNR have failed.

ipconfigUSE_NBNS must be set to 1 in FreeRTOSIPConfig.h for NBNS to be enabled. As with LLMNR, the application writer must provide the xApplicationDNSQueryHook() callback function which takes a character pointer as a parameter and returns pdTRUE if the name passed into the function matches a name used to identify the node.

Useful links:

• TCP/IP Networking Basics
• FreeRTOS+TCP networking tutorial

Other networking basics pages:

• Ethernet Networking and Addressing
• MTU - Maximum Transmission Unit
• IP Networking
• IP Network Addressing
• ARP - Address Resolution Protocol
• Subnets / Netmasks
• Gateways and Routers
• UDP Networking
• TCP Networking
• MSS - Maximum Segment Size
• Port Numbers
• Sockets
• Binding
• Clients and Servers
• Static IP Addresses
• DHCP - Dynamic Host Control Protocol
• Name Resolution
• DNS - Domain Name Service
• LLMNR - Link-local Multicast Name Resolution
• NBNS - NetBIOS Name Service
• Bytes Order and Endian