The UDP checksum is performed over the entire payload, and the other fields in the header, and some fields from the IP header. A pseudo-header is constructed from the IP header in order to perform the calculation (which is done over this pseudo-header, the UDP header and the payload). The reason the pseudo-header is included is to catch packets that have been routed to the wrong IP address ...
My understanding is that a hash code and checksum are similar things - a numeric value, computed for a block of data, that is relatively unique. i.e. The probability of two blocks of data yielding...
This also works with the new analytic function’s OVER clause in SQL Server 2005. BINARY_CHECKSUM: As the name states, this returns the binary checksum value computed over a row or a list of expressions. The difference between CHECKSUM and BINARY_CHECKSUM is in the value generated for the string data-types.
Em poucas palavras, o checksum serve para verificar, por exemplo, se um arquivo é exatamente o mesmo arquivo depois de uma transferência. Para verificar se não foi alterado por terceiros ou se não está corrompido. A ideia é, por exemplo, pegar nos bytes todos de um arquivo e somá-los, um a um, e obter um valor, o checksum. Depois de uma transferência, esse valor do checksum deve ser o ...
O que é e para que serve um checksum? - Stack Overflow em Português
CRC (Cyclic Redundancy Check) is a type of checksum, specifically a position dependent checksum algorithm (among others, such as Fletcher's checksum, Adler-32). As their name suggest, these detect positional changes as well, which makes them more robust - thus more widely used - than other checksum methods.