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Redes de Computadoras

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La AAL pue<strong>de</strong> ser consi<strong>de</strong>rada como “la capa <strong>de</strong> transporte <strong>de</strong> ATM”.<br />

Existen 3 AAL’s diferentes <strong>de</strong>pendiendo <strong>de</strong>l tipo <strong>de</strong> servicio que se va<br />

a prestar:<br />

<strong>Re<strong>de</strong>s</strong> <strong>de</strong> <strong>Computadoras</strong>, 2007/08<br />

Protocolo<br />

AAL 1<br />

AAL 2<br />

AAL 5<br />

Uso<br />

CBR (telefonía)<br />

VBR (audio y ví<strong>de</strong>o comprimido)<br />

UBR (datagramas IP)<br />

La capa AAL genera su propia información <strong>de</strong> control y pue<strong>de</strong> “robar”<br />

espacio a los datos útiles.<br />

31.7 Arquitectura <strong>de</strong> ATM 556

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