I am reading the book practical packet analysis and I have just learned the fundamentals of the ARP protocol. They also added something about the arp -a cmd command. I'm curious about some of the extra addresses, and I can't find much information about them on the web. I understand that FF:FF:FF:FF:FF:FF means broadcast to all. I'm also aware of the network address and host address combination of the IP address in dottedquad notation and understand the subnet mask.
Although I am still furiously curious about this ARP table. When I enter the commands arp -a This is the output of my CMD:
Interface: 192.168.1.4 --- 0xd
Internet Address Physical Address Type
192.168.1.1 a0-21-b7-b0-da-2f dynamic
192.168.1.255 ff-ff-ff-ff-ff-ff static
188.8.131.52 01-00-5e-00-00-16 static
184.108.40.206 01-00-5e-00-00-fb static
220.127.116.11 01-00-5e-00-00-fc static
255.255.255.255 ff-ff-ff-ff-ff-ff static
I am just curious about the last four connections of class D networks. Should these be here normally? Is my computer connecting to something other than the router with the ARP normally? I understand that ARP broadcasts itself to every computer on a network. I'm just curious about this ARP table because the book is lacking an explanation on this. I would love to understand the purpose behind the standard listing of these addresses in my ARP table.
As always please and thank you.