APPLICATION LAYER
PEER TO PEER PARADIGM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Rarest Piece First
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Strict Priority
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Random First Piece
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End Game Mode
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Detailed explanation-1: -The BitTorrent protocol selects pieces by using the following four simple policies: Policy #1: Strict Policy: Until a piece is assembled, only download sub-pieces for that piece. Policy #2: Rarest First: Determine the pieces that are most rare among your peers and download those first.
Detailed explanation-2: -Typically, BitTorrent uses TCP as its transport protocol for exchanging pieces, and it uses HTTP for tracker comms. The well known TCP port for BitTorrent traffic is 6881-6889 (and 6969 for the tracker port). The DHT extension (peer-to-peer tracker) uses various UDP ports negotiated by the peers.
Detailed explanation-3: -The rarest first algorithm is a piece selection strategy that consists of selecting the rarest pieces first. This simple strat-egy used by BitTorrent performs better than random piece selection strategies [5, 9].