... Spaces

This research was sponsored by DARPA under contract number F30602-99-1-0518, and by NSF under grant numbers Career Award NCR-9624979, ANI-9730105, ITR Award ANI-0085920, and ANI-9814929. Additional support was provided by Intel. Views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of DARPA, NSF, Intel, or the U.S. government.

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... addresses.

Reusable-IP addresses are the network prefixes 10/8, 172.16/12 and 192.168/16 [21]. We use the term ``reusable-IP addresses'' instead of the more conventional ``private-IP addresses'' to distinguish from another use of these addresses to build private IP networks that are intentionally made inaccessible to the public Internet.

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... gateways.

Note that no known solution can provide general bi-directional connectivity without extending the functionality of the NAT gateway. However, since the operator of a NAT gateway has incentives to perform the upgrade, deployment should not be hindered.

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....

Such an IP address is usually obtained through DNS, and since a DNS server's address is known by configuration, we can assume any IP host's address can be known by $B$ without any loss of generality.

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... 2).

Selecting a waypoint based on performance metrics is a topic for future research.

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