From 9abda0778aa32541096c36aa2aed934eb7863189 Mon Sep 17 00:00:00 2001 From: Austin Songer Date: Sun, 26 Jan 2020 01:22:39 +0000 Subject: [PATCH] ANSWERED: What is ARP? How it works? --- README.md | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/README.md b/README.md index 07be36e..b362c8c 100644 --- a/README.md +++ b/README.md @@ -1009,6 +1009,12 @@ A default gateway serves as an access point or IP router that a networked comput
What is ARP? How it works?
+ +ARP stands for Address Resolution Protocol. When you try to ping an IP address on your local network, say 192.168.1.1, your system has to turn the IP address 192.168.1.1 into a MAC address. This involves using ARP to resolve the address, hence its name. + +Systems keep an ARP look-up table where they store information about what IP addresses are associated with what MAC addresses. When trying to send a packet to an IP address, the system will first consult this table to see if it already knows the MAC address. If there is a value cached, ARP is not used. + +