What is the difference between deep packet inspection and stateful inspection?

Question

Options

• ADeep packet inspection gives insights up to Layer 7, and stateful inspection gives insights only up
• BDeep packet inspection is more secure due to its complex signatures, and stateful inspection
• CStateful inspection is more secure due to its complex signatures, and deep packet inspection
• DStateful inspection verifies data at the transport layer and deep packet inspection verifies data at

• A
  86% (25)
• B
  3% (1)
• C
  7% (2)
• D
  3% (1)

Explanation

Deep Packet Inspection (DPI): DPI involves analyzing the contents of packets at a granular level, examining up to the application layer (Layer 7) of the OSI model. It looks beyond header information to inspect the actual data payload, allowing detailed analysis of packet content. DPI can inspect and understand the specific application-layer protocols and data, enabling better identification and control of traffic based on application-specific characteristics or signatures. Stateful Inspection: Stateful inspection operates at the network and transport layers (Layers 3 and 4) of the OSI model. It monitors the state of active connections by keeping track of the state of network connections (such as TCP handshakes) and the context of the traffic. It evaluates packets based on predetermined rules and session information to determine whether incoming packets belong to an existing established connection (using a state table). It focuses on the context and state of the traffic rather than inspecting the content of individual packets.

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