IP Question

[Acidman]

I know that either 56ghey users or High Speed users log onto a different IP each time they connect to the internet.

I was just wondering wether it was the High Speed users or the 56Ghey users whos IP changes?


Or am I totally wrong in what I think?

 

[Viper_Maniac]

56k users ip changes each time they log on. At least thats what it did to me when I used 56k. Most high speed users connect using the same ip each time.

 

[Shannon]

All dialup users (56K and ISDN) have a dynamic IP, meaning it changes every time they connect. I've heard that a dynamic IP also changes while you're on the net too...

The majority of broadband users also have a dynamic IP, however, you can opt for a static IP (one that never changes) with most ISP's for about $10 more.

 

[GilesGuthrie]

Dynamic IP addresses come from a DHCP server (Dynamic Host Configuration Protocol). It's more economical for an ISP to use dynamic addressing because then they can contend the addresses, that means they have less IP addresses than subscribers. If each subscriber had a fixed IP address, they would have to have a 1:1 ratio of IP addresses to subscribers.

The IP address can change during a session because addresses are leased to clients by the DHCP server. If your session is longer than the lease, you will request a new lease from the DHCP server. This could be the same address, or it could change, depending upon what addresses are available when you request your address.

It has been noted that DHCP clients and servers can create an 'affinity', tending to pick up the same address each time they get a lease. However, I think this is less common now, and most DHCP servers will issue the lowest address available whenever a client requests a lease.

 

[Shannon]

Originally posted by GilesGuthrie
Dynamic IP addresses come from a DHCP server (Dynamic Host Configuration Protocol). It's more economical for an ISP to use dynamic addressing because then they can contend the addresses, that means they have less IP addresses than subscribers. If each subscriber had a fixed IP address, they would have to have a 1:1 ratio of IP addresses to subscribers.

The IP address can change during a session because addresses are leased to clients by the DHCP server. If your session is longer than the lease, you will request a new lease from the DHCP server. This could be the same address, or it could change, depending upon what addresses are available when you request your address.

It has been noted that DHCP clients and servers can create an 'affinity', tending to pick up the same address each time they get a lease. However, I think this is less common now, and most DHCP servers will issue the lowest address available whenever a client requests a lease.

Trust Giles to come in here and get all technical...