$10\mathrm{.}1$ When the Squirrel peer$-$to$-$peer web caching service was evaluated by simulation, $4\mathrm{.}11$ hops were required on average to route a request for a cache entry when simulating the Redmond traffic, whereas only $1\mathrm{.}8$ were required for the Cambridge traffic. Explain this and show that it supports the theoretical performance claimed for Pastry.