Layers and protocols
Basically a distinction is made between three port areas:
• System ports / standardized ports
Ports 0 to 1023 (0
hex
to 3FF
hex
)
These ports are reserved for services, if they have not already been assigned as "reserved
ports" of the IANA itself (e.g. for future expansions).
• Registered ports
1024 to 49151 (400
hex
to BFFF
hex
)
These ports are intended for registered services, but can also be used for client programs.
• Dynamic ports
Ports 49152 to 65535 (C000
hex
to FFFF
hex
)
These ports are assigned dynamically from the operating system to client programs.
Connecting
8.2 Communication services and used port numbers
NCU 1740
56
Equipment Manual, 10/2021, A5E51087503B AA
