Within the Encrypted Security payload (ESP) extension header, which of the following identifies
the encryption association?
Security Parameters Index (SPI)
By combining the SPI with the destination address and the Security Protocol (ESP) identifies the
security association of the packet. The SPI is an unsigned 32-bit integer.
B: The ESP header does not have a field called the payload type. There is payload data and
payload length, for the length of the payload. The type of payload is actually stored in the next
C: Padding are the characters added after the data payload. The number of padding characters is
determined by a pad length. Padding is used to control the size and alignment of the message.
The Pad Length indicates the number of 8-bit passing bytes to be added after the data. The
padding ensures the message ends on a 64-bit boundary.
D: The sequence number is used for anti-replay.