问题：

[多选] Which of the following correctly describe steps in the OSI data encapsulation process?（）

A . The transport layer divides a data stream into segments and may add reliability and flow control information.
B . The data link layer adds physical source and destination addresses and an FCS to the segment.
C . Packets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.
D . Packets are created when the network layer adds Layer 3 addresses and control information to a segment.
E . The presentation layer translates bits into voltages for transmission across the physical link.