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GIAC GSEC Exam - Topic 9 Question 25 Discussion
Topic #: 9
On which of the following OSI model layers does IPSec operate?
Internet Protocol Security (IPSec) is a standard-based protocol that provides the highest level of VPN security. It is used for VPN connections
that use the L2TP protocol. It secures both data and passwords. IPSec operates at the network layer of the Open Systems Interconnect (OSI)
model.
Answer option A is incorrect. The physical layer is responsible for packaging and transmitting data on the physical media. This layer conveys
the bit stream through the network at the electrical and mechanical level.
Answer option C is incorrect. The data-link layer is responsible for error free transfer of data frames. This layer provides synchronization for
the physical level.
Answer option D is incorrect. The session layer establishes a communication session between processes running on different communication
entities in a network and can support a message-mode data transfer.
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