Lab 3‐2: Exploring Broadcast Domains - sthompson2752/Network-Fundamentals GitHub Wiki

This lab involved pinging IP addresses to understand how a LAN functions on layer 2 of the OSI model.

Useful Commands: 8.8.8.8: IP of Google's Public DNS Server

Address Resolution Protocol, or ARP, occurs when a device tries to find another device's MAC address via an IPv4 address that it has. A device will broadcast its message to every device in the LAN (its broadcast domain) asking who has the IP it is sending. A device with that IP will reply saying that the IP is at a certain MAC address. ARP requests for IPs outside of networks request for the default gateway.

Network traffic can be looked through in several ways. One of the most useful ways is to filter for what is needed. If an ARP or ICMP packet is needed, just type it into the display filter bar at the top of Wireshark to filter results. To capture a packet, stop the Wireshark capture and select the necessary packet.

My partner and I had trouble pinging each other at first. We realized that we were using the wrong IP addresses and had to use the addresses related to our VMs instead.