A receiving host computes the checksum on a frame and determines that the frame is
damaged. The frame is then discarded. At which OSI layer did this happen?

A.
session

B.
transport

C.
network

D.
data link

E.
physical

Explanation:
The Data Link layer provides the physical transmission of the data and handles error
notification, network topology, and flow control. The Data Link layer formats the message
into pieces, each called a data frame, and adds a customized header containing the
hardware destination and source address. Protocols Data Unit (PDU) on Datalink layer is
called frame. According to this question the frame is damaged and discarded which will
happen at the Data Link layer.