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Redes de Computadoras

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12.3. La suma <strong>de</strong> comprobación (checksum)<br />

RFC 1071.<br />

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

Forma simple <strong>de</strong> control <strong>de</strong> errores.<br />

Consiste en calcular la suma aritmética módulo 16 <strong>de</strong> todas las palabras<br />

<strong>de</strong>l datagrama UDP y <strong>de</strong> la pseudo-cabecera, y calcular su<br />

complemento a 1 (negativo).<br />

Se pue<strong>de</strong> ignorar, permitiendo así la recepción <strong>de</strong> un datagrama con<br />

errores [14].<br />

12.3 La suma <strong>de</strong> comprobación (checksum) 220

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