 | Copyright © 2009, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |
On a link that uses CRCs for frame checking, the data source uses a predefined polynomial algorithm to calculate a CRC number from the data it is transmitting. The result is included in the FCS field of the frame and transmitted with the data. On the receiving end, the destination host performs the same calculation on the data it receives.
If the result of the second calculation matches the contents of the FCS field, the packet was sent and received without bit errors. If the values do not match, an FCS error is generated, the frame is discarded and the originating host is notified of the error.
Checksums function similarly to CRCs, but use a different algorithm.
| Copyright © 2009, Juniper Networks, Inc. All rights reserved. Trademark Notice. | |