There are a few drawbacks of multilayer protocols:
- Covert channels are allowed.
- Filters can be bypassed.
- Logically imposed network segment boundaries can be overstepped.
- Chapter 11 Secure Network Architecture and Securing Network Components
- from (ISC)2 CISSP Certified Information Systems Security Professional Official Study Guide, 8th Edition
- Publisher: Sybex
- Released: May 2018
Filters - HTTP over ICMP
Logically implemation - Eg: VLAN hopping for stepping the boundaries
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