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41 Last updated: 28 Oct, 2014 Print Email to friend Views: 114116 About CRC Errors A CRC error indicates that some data in your Zip file (.zip or .zipx) is damaged.
Cyclic Redundancy Check Error
CRC stands for cyclic redundancy check. It is a calculation made from all
Crc Cambridge
the data in a file to insure accuracy. When you add a file to a Zip file, WinZip calculates a crc check CRC value for the file and saves the value in the Zip file. When you later extract the file from the Zip file, WinZip calculates the CRC of the extracted file and https://supportforums.cisco.com/discussion/10806391/crc-error-and-input-error-how-can-fix-these compares it to the value stored when the file was zipped. If these two CRC values do not match, the file that was extracted does not match the original file, and WinZip will display a CRC Error message. When the data in a Zip file is damaged, it may not be possible to extract all of the files from the Zip file correctly. Damaged data can http://kb.winzip.com/kb/entry/41 affect the entire Zip file, multiple files, or just one file. Why CRC Errors Occur There are many possible causes for data damage. Among the most common is a transfer error when downloading a Zip file from the internet. Such an error can introduce invalid data into a Zip file. Some other possible causes include exposure of media to excessive temperatures or magnetic fields, cross linked disk sectors, and mechanical problems with disk drives. What to do if a CRC Error Occurs The best solution to the problem of a damaged Zip file is to try to obtain another copy of the file. For example, use your backup copy of the file or get a new copy from the original source. If you obtained the Zip file by downloading it, then downloading it again will almost always solve the problem. A "Last Resort" for CRC Errors If you cannot download a new copy of the Zip file, obtain a replacement disk, or use a backup copy, you may still be able to recover some of your files, and even save portions of the files that are damaged in the Zip file. Here is the recommended proced
reliable link. This is done by including redundant information in each transmitted frame. Depending on the nature of the link and the data one can either: include just http://www.cs.jhu.edu/~scheideler/courses/600.344_S02/CRC.html enough redundancy to make it possible to detect errors and then arrange for the retransmission of damaged frames, or include enough redundancy to enable the receiver to correct any errors produced https://www.youtube.com/watch?v=ZJH0KT6c0B0 during transmission. Most current networks take the former approach. One widely used parity bit based error detection scheme is the cyclic redundancy check or CRC. The CRC is based on some fairly crc error impressive looking mathematics. It is helpful as you deal with its mathematical description that you recall that it is ultimately just a way to use parity bits. The presentation of the CRC is based on two simple but not quite "everyday" bits of mathematics: polynomial division arithmetic over the field of integers mod 2. Arithmetic over the field of integers mod 2 is crc error fix simply arithmetic on single bit binary numbers with all carries (overflows) ignored. So 1 + 1 = 0 and so does 1 - 1. In fact, addition and subtraction are equivalent in this form of arithmetic. Polynomial division isn't too bad either. There is an algorithm for performing polynomial division that looks a lot like the standard algorithm for integer division. More interestingly from the point of view of understanding the CRC, the definition of division (i.e. the definition of the quotient and remainder) are parallel. When one says "dividing a by b produces quotient q with remainder r" where all the quantities involved are positive integers one really means that a = q b + r and that 0 <=r < b When one says "dividing a by b produces quotient q with remainder r" where all the quantities are polynomials, one really means the same thing as when working with integers except that the meaning of "less than" is a bit different. For polynomials, less than means of lesser degree. So, the remainder of a polynomial division must be a polynomial of degree less
Du siehst YouTube auf Deutsch. Du kannst diese Einstellung unten ändern. Learn more You're viewing YouTube in German. You can change this preference below. Schließen Ja, ich möchte sie behalten Rückgängig machen Schließen Dieses Video ist nicht verfügbar. WiedergabelisteWarteschlangeWiedergabelisteWarteschlange Alle entfernenBeenden Wird geladen... Wiedergabeliste Warteschlange __count__/__total__ Cyclic Redundancy Check(CRC) example The BootStrappers AbonnierenAbonniertAbo beenden3.6543 Tsd. Wird geladen... Wird geladen... Wird verarbeitet... Hinzufügen Möchtest du dieses Video später noch einmal ansehen? Wenn du bei YouTube angemeldet bist, kannst du dieses Video zu einer Playlist hinzufügen. Anmelden Teilen Mehr Melden Möchtest du dieses Video melden? Melde dich an, um unangemessene Inhalte zu melden. Anmelden Transkript Statistik 59.904 Aufrufe 602 Dieses Video gefällt dir? Melde dich bei YouTube an, damit dein Feedback gezählt wird. Anmelden 603 46 Dieses Video gefällt dir nicht? Melde dich bei YouTube an, damit dein Feedback gezählt wird. Anmelden 47 Wird geladen... Wird geladen... Transkript Das interaktive Transkript konnte nicht geladen werden. Wird geladen... Wird geladen... Die Bewertungsfunktion ist nach Ausleihen des Videos verfügbar. Diese Funktion ist zurzeit nicht verfügbar. Bitte versuche es später erneut. Veröffentlicht am 12.05.2015This video shows that basic concept of Cyclic Redundancy Check(CRC) which it explains with the help of an exampleThank you guys for watching. If you liked it please leave a comment below it really helps to keep m going!:) Kategorie Bildung Lizenz Standard-YouTube-Lizenz Mehr anzeigen Weniger anzeigen Wird geladen... Anzeige Autoplay Wenn Autoplay aktiviert ist, wird die Wiedergabe automatisch mit einem der aktuellen Videovorschläge fortgesetzt. Nächstes Video CRC Calculation Example, Cyclic Redundancy Check Division, Error Control, Detection Correction, Data - Dauer: 10:04 Techno Bandhu 14.804 Aufrufe 10:04 Cyclic Redundancy Check (CRC) - Dauer: 14:37 Natarajan Meghanathan 157.231 Aufrufe 14:37 Cyclic Redundancy Check ( incl. Examples and Step-By-Step Guide) - Computer Networks - Dauer: 20:22 MisterCode 3