Which of the following layers supervises the control rate of packet transfers in an Open Systems
Interconnections (OSI) implementation?

A.
Physical

B.
Session

C.
Transport

D.
Network

Explanation:
The transport layer defines how to address the physical locations and /or devices on
the network, how to make connections between nodes, and how to handle the networking of
messages. It is responsible for maintaining the end-to-end integrity and control of the session.

Services located in the transport layer both segment and reassemble the data from upper-layer
applications and unite it onto the same data stream, which provides end-to-end data transport
services and establishes a logical connection between the sending host and destination host on a
network. The transport layer is also responsible for providing mechanisms for multiplexing upperlayer applications, session establishment, and the teardown of virtual circuits. -Ronald Krutz The
CISSP PREP Guide (gold edition) pg 275-276
“Transport Layer The agreement on these issues before transferring data helps provide more
reliable data transfer, error detection and correction, and flow control and it optimizes network
services needed to perform these tasks.” Pg. 318 – 319 Shon Harris: All-In-One CISSP
Certification Guide.