Hi all,
This is my first post, so if I am asking something too simple/stupid , bear with me.
I have a always on Internet connection, where my ISP provides it by putting a NIC and giving a class B (private) IP. so basically he makes u a part of the LAN which he routes to internet through couple of public IPs.
1. Just for learning, When a do a capture using ethereal, I see lots of ARP broadcast, almost 90% of the traffic is arp broadcast.Is this normal ? how can i tell how much brodcast is normal on a network?
why would my PC keep refreshin its ARP table even when i am not talking to any other IP/comp. on the network?

2. since I can not browse my network( says u dont have permision), is there a way to see what/how many IPs/comp. are there, on the HUB i am directly connected to? MY ISP has also blocked ping and tracert.(I guess he has blocked ICMP protocol.)

thanks in advance!
------------------------------------------