Question

What Ethernet field contains a 4-byte cyclic redundancy check (CRC) value?

A) Frame Check Sequence (FCS)
B) EtherType
C) Source MAC Address
D) Destination MAC Address

Answer 1

The Frame Check Sequence (FCS) is the field in an Ethernet frame that contains a 4-byte cyclic redundancy check (CRC) value, crucial for error detection in Ethernet networking.

Step-by-step explanation:

The field in an Ethernet frame that contains a 4-byte cyclic redundancy check (CRC) value is the Frame Check Sequence (FCS). This field is used to detect any errors that might have been introduced to the frame during its transmission. It is a component of the error detection mechanism in Ethernet networking, where the sender includes this CRC value, which is a result of a polynomial division of the contents of the frame. The receiver then performs the same calculation; if the resulting CRC matches the one received, it is assumed that the frame was transmitted without errors.