i have 2 questions:
1)The first and primary questions is:
I work in an organization(lets say one LAN)
and all the users can access the internet - so when several users come to me and say that they cannot connect the internet - how do i start checking whats wrong? is it different procedure when the problem is only with one user? and by the way - how does an organization can access the internet, i mean what enables it in the router/switch configuration?
2)I know subnetting but i always asked myself why do you need a subnet mask? i mean - its not something that you cannot change or surpass, so what is the main reason for having Subnet-Mask?
Thanks in advance!