The answer to which port is used by ARP depends on the specific implementation of ARP being referred to.
Based on the provided reference, Unisys ARP uses port 219 on both TCP and UDP.
ARP and Port Numbers
The Address Resolution Protocol (ARP) generally operates at Layer 2 (Data Link Layer) of the OSI model and doesn't typically use port numbers like TCP or UDP, which operate at Layer 4 (Transport Layer). However, specific implementations of ARP, like Unisys ARP, can use designated port numbers.
Unisys ARP Port Information
- Protocol: Unisys ARP uses both TCP and UDP.
- Port Number: 219
Summary
While standard ARP doesn't use ports, Unisys ARP utilizes port 219 for both TCP and UDP.
