# Proxy ARP Explained **URL:** https://forum.networklessons.com/t/proxy-arp-explained/1099 **Category:** Lessons Discussion **Created:** [December 26, 2016, 10:49pm UTC](https://forum.networklessons.com/t/proxy-arp-explained/1099 "2016-12-26T22:49:27Z") **Posts on this page:** 1 **Showing post:** 17
### Author: ![ananth.gmk](https://cdn-forum.networklessons.com/letter_avatar_proxy/v4/letter/a/6a8cbe/32.png) [@ananth.gmk](https://forum.networklessons.com/u/ananth.gmk) #### Post date: [October 11, 2016, 8:16am UTC](https://forum.networklessons.com/t/proxy-arp-explained/1099/17 "2016-10-11T08:16:12Z")
Hi Rene, i have a question. Do each interface in router has different mac addresses ? If the router has 5 interfaces , whether it will have 5 mac addresses ( one for each port) along with router base mac address. In the above example I see 10.1.1.254 and 10.2.2.254 has different mac address. what is the advantage of having a router base mac address. Also for layer 2 switches , how the mac address will be. If it is a 24 port switch , how many mac addresses it will have in addition to the base mac address. i am asking this because when we see how switches learn mac address , the mac address of the host machine alone is described and not the mac address of the port. Can you pls clarify? --- _[View the full topic](https://forum.networklessons.com/t/proxy-arp-explained/1099)._