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Windows 7: Why are the pre-set static ARP entries?

08 Sep 2012   #1

Windows 7 Home Premium 64 bit
Why are the pre-set static ARP entries?

When viewing my arp table ('arp -a'). There are all the computers on my lan. But there are also a few static entries. I attached a screen shot of it.

Why are there arp table entries for,, etc. and what are they for?

Attached Images
My System SpecsSystem Spec

08 Sep 2012   #2

Windows 7 64 bit SP1

The 224 addresses are multicast addresses - packets sent to those address will be received my multiple hosts (or routers). is the IGMP (Internet group Management protocol). for instance is all routers broadcast. are unassigned and I think are used on the local network for some windows services multicasting (e.g. )

EDIT: I guess I should add that your computer is listening on for multicast packets on that address. That is why it is static.
My System SpecsSystem Spec
09 Sep 2012   #3

Windows 7 Home Premium 64 bit

My System SpecsSystem Spec


 Why are the pre-set static ARP entries?

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