Addressing Scheme
netwicked
Member Posts: 17 ■□□□□□□□□□
in CCNA & CCENT
Hey everyone,
I'm sitting here on campus and just connected to my school network.
I'm studying for my ICND1 so I decided to check what IP Address was assigned to me.
I noticed it was a Class B Public Address with a /23 mask. From everything I have learned so far, I know that NAT Overload is helping us temporarily fix the IP Address depletion problem. So businesses and organizations are using Private IPs within the organization and NAT Overload when they want to get out to the Internet.
Seeing as how my school just assigned me a Class B Public Address, and seeing the hundreds and thousands of other kids around here on the Internet, I am wondering if this is a normal practice. Why is the school assigning everyone Public IPs instead of giving us Private IPs and implementing NAT Overload?
I went to www dot whatismyip dot com to verify that the outside world is seeing this Class B Public IP. The website confirmed me with the same Class B address assigned by school.
By assigning us all Public IPs, isn't that wasting addresses?
I'm sitting here on campus and just connected to my school network.
I'm studying for my ICND1 so I decided to check what IP Address was assigned to me.
I noticed it was a Class B Public Address with a /23 mask. From everything I have learned so far, I know that NAT Overload is helping us temporarily fix the IP Address depletion problem. So businesses and organizations are using Private IPs within the organization and NAT Overload when they want to get out to the Internet.
Seeing as how my school just assigned me a Class B Public Address, and seeing the hundreds and thousands of other kids around here on the Internet, I am wondering if this is a normal practice. Why is the school assigning everyone Public IPs instead of giving us Private IPs and implementing NAT Overload?
I went to www dot whatismyip dot com to verify that the outside world is seeing this Class B Public IP. The website confirmed me with the same Class B address assigned by school.
By assigning us all Public IPs, isn't that wasting addresses?
Comments
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networker050184
Mod Posts: 11,962 Mod
Funny me and coworker were just having this discussion.
Schools and other large organizations were allocated huge IP blocks before the whole "address shortage" so a lot of these organizations have plenty of public IP addresses to assign to all their hosts. Is it wasting addresses? Well, what else are they going to do with them if they are assigned to them and nobody else can use them? I guess they could sell them back or something, but I'm not sure of how the politics of that works.An expert is a man who has made all the mistakes which can be made. -
kalebksp
Member Posts: 1,033 ■■■■■□□□□□
Universities and government offices were some of the first organizations to connect to the internet. Many of them requested and received large blocks of addresses. Since they own those IP addresses they have no need to use NAT.
I've heard that there are companies that own class A blocks and don't use them at all, but since they're a rare commodity they're not just going to give them back. -
netwicked
Member Posts: 17 ■□□□□□□□□□
Oh I get it. I thought it was quite strange that they'd do this. Especially when IPv4 addresses are depleting.