Address Resolution Protocol (ARP) and Communication Flow Analysis

Hello guys, You know I used to get stuck thinking about how devices communicate each other, because unlike humans they don't have any senses right. But this concept answered all my questions and i am really excited to share my learning. So the very important Topic is ARP, here it works at layer 2 with MAC addresses and there are different types in ARP requests like reverse ARP, Gratuitous ARP. These are the contents i am going to discuss in this blog: -->ARP Fundamentals -->ARP Operation in Same Subnet Communication -->ARP Operation Across Different Networks (via Router) -->Switch MAC Learning Behavior -->ICMP Communication Flow -->Default Gateway Logic -->Network Addressing Concepts -->NIC, Network ID, Host ID -->CCNA Key Concepts 1]Address Resolution Protocol (ARP) The Address Resolution Protocol (ARP) is defined in RFC 826 and is used to resolve a Layer 3 IPv4 address into a corresponding Layer 2 MAC address within an Ethernet network segment. In Ethernet LAN communication, devices