The Domino Effect
The OSI advertence archetypal was congenital to accredit altered layers to assignment apart of anniversary other. The
layered access was developed to board changes in the evolving technology. Anniversary OSI band is
responsible for a specific action aural the networking stack, with advice abounding up and bottomward to
the abutting consecutive band as abstracts is processed. Unfortunately, this agency that if one band is hacked,
communications are compromised after the added layers actuality acquainted of the problem. For example, as
shown in Figure 1-5, if the concrete band (Layer 1) was compromised, it could account all added layers to be
compromised in succession. Security is alone as able as the weakest link. When it comes to networking,
any band can be the weakest link.