Editing Internetwork Packet Exchange (section)

===Socket number===

The socket number serves to select a process or application in the destination node.
The presence of a socket number in the IPX address allows the IPX to act as a [[transport layer]] protocol, comparable with the [[User Datagram Protocol]] (UDP) in the [[Internet protocol suite]].

{|class=wikitable style="text-align:left;"
|-
! Socket number !! Protocol
|-
| 0x0001–0x0BB8 || Registered by [[Xerox]]
|-
| 0x0001 || Routing Information Packet
|-
| 0x0002 || Echo Protocol Packet
|-
| 0x0003 || Error Handling Packet
|-
| 0x0020–0x003F || Experimental
|-
| 0x0BB9–0xFFFF || Dynamically Assigned
|-
| 0x0451 || [[NetWare Core Protocol]] (NCP – used by [[Novell NetWare]] servers)
|-
| 0x0452 || [[Service Advertising Protocol]] (SAP)
|-
| 0x0453 || [[Routing Information Protocol]] (RIP)
|-
| 0x0455 || [[NetBIOS]]
|-
| 0x0456 || Diagnostic Packet
|-
| 0x0457 || Serialization Packet (used for NCP as well)
|-
| 0x4000–0x4FFF || Dynamically Assigned Socket Numbers 
|-
| 0x4003 || Used by [[Novell NetWare]] Client
|-
| 0x8000–0xFFFF || Statically Assigned Socket Numbers
|-
| 0x8060 || [[Logical Link Control|LLC]]<ref name="RFC1132" />
|-
| 0x9091 || [[Transmission Control Protocol|TCP]] over IPXF
|-
| 0x9092 || [[User Datagram Protocol|UDP]] over IPXF
|-
| 0x9093 || IPXF, IPX Fragmentation Protocol
|}