DNS entry is "::1"

I was looking at a prospect's SBS 2008 server and the DNS entries (IPCONFIG /ALL) wer the following:

I have never seen the entry: ":1" as a DNS entry. Nor have I seen the loopback address as an entry.  The last entry is the router address.

Can someone please enlighten me on the logic behind these entries?

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jessc7Connect With a Mentor Commented:
::1 is the IPv6 loopback address. It is the IPv6 equivalent of

Don JohnstonConnect With a Mentor InstructorCommented:
Looks like you missed a ":".

In an IPv6 address contiguous 0's can be represented by ::. So an address of FC80:0000:0000:0000:0000:000:0000:0001 can be expressed as FC80::1.

The address of ::1 (or 0000:0000:0000:0000:0000:0000:0000:0001) is the IPv6 loopback address.
beyondtAuthor Commented:
So is it acceptable to have the DNS point to the Loopback addresses and the Router address?  Are there advantages to this as opposed to having it point to the SBS machince address?
Andrew OakeleyConnect With a Mentor ConsultantCommented:
The router address should not be in there. It should only point to itself.
beyondtAuthor Commented:
Thanks for all three of the answers.  They cleared this up for me.
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