# Expected IP VS Actual IP

**URL:** <https://forum.inductiveautomation.com/t/expected-ip-vs-actual-ip/77590>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [August 8, 2023, 9:54pm UTC](https://forum.inductiveautomation.com/t/expected-ip-vs-actual-ip/77590 "2023-08-08T21:54:44Z")\
**Posts on this page:** 1\
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**Author:** ![ryan.white](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/ryan.white/32/73193_2.png) [@ryan.white](https://forum.inductiveautomation.com/u/ryan.white)\
**Post date:** [August 8, 2023, 9:57pm UTC](https://forum.inductiveautomation.com/t/expected-ip-vs-actual-ip/77590/2 "2023-08-08T21:57:01Z")

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> [@Mobile Client MAC Address](https://forum.inductiveautomation.com/t/mobile-client-mac-address/23037/9):
>
> In answer to both questions, the answers are to be found in the following abbreviations: A.R.P. and R.A.R.P. This is to say, that routers and such use Address Resolution Protocol and Reverse Address Resolution Protocol to query a given I.P. Address or MAC address if given the other one. Because you are frequently dealing with situations like D.H.C.P. ( Dynamic Host ) where the IP address changes according to what address just happens to be unused in a pool, you could obtain a list of possible MA…

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