Free riders is a problem of P2P.
In BT, peer list are unstructured and random, nothing to do for new
arrival or departure of peers.
The size of the active swarms is proportional to square root of
upload capacity.
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Bram Cohen (2003) Incentives Build Robustness in BitTorrent (IPTPS'03)
Problems of P2P download: Peers usually connects only for a few minutes and the fairness (i.e. upload rate proportional to download rate).
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Estan & Varghese (2002) New Directions in Traffic Measurement and Accounting (SIGCOMM and UCSD CD TR 699)
Generalised flow: Identified by a function of the header field values, so that it is not constrained to 5-tuples.
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Floyd and Paxson (2001) Difficulties in Simulating the Internet (TON)
Difficulties of simulation: Heterogenity of topology, protocol, link properties. Also the changing nature of the internet, e.g. routes changing all the time, trend of applications, topology, router features.
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Kim, Lau, Chuah, Chao (2004) PacketScore: Statistics-based Overload Control against DDoS Attacks (INFOCOM)
DDD: Detect for the victim, Differentiate traffic into attack and legitimate, Discard suspicious packets according to legitimate score and congestion level
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