ICP versus Cache Digests

ICP incurs a latency and network traffic overhead per request/response transaction, and since it's a UDP based protocol there's no congestion control.

By contrast, Cache Digests summarise the details of the objects in a Cache as a single binary object which can be downloaded by (for example) other caches.

We can populate a 'fake' Cache Digest for our server by combining the various URL prefixes for the mirrored resources with the URL suffixes obtained from a traversal of (say) the canonical site, e.g.

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