Solution

The correct answer is E, D, A, C, B

Key Points

To understand the sequence of fields in an IP datagram header, let's break down each component:

• Service Type (E)
  • This field specifies the quality of service desired for the datagram.
• Identification (D)
  • This field is used for uniquely identifying the fragments of an original IP datagram.
• Flags (A)
  • The flags field is used to control or identify fragments.
• Protocol (C)
  • This field indicates the protocol used in the data portion of the IP datagram.
• Options (B)
  • This field is optional and used for network testing, debugging, security, and more.

So, the correct order is: E, D, A, C, B