‫So let's talk a little bit about the network and data link layer security.
‫Why is it important and how can we classify the network layer attacks, et cetera?
‫When Osai model was introduced, there is no thinking of any type of security.
‫Security just wasn't part of the design of either the OSAI or TCP IP models.
‫Further, while there may be osai layers, there are not necessarily protocols that correspond to them.
‫See, OCI was built to allow different layers to work without knowledge of each other, so any compromise
‫in lower levels directly affects the higher level.
‫As a result, a system is as secure as its weakest link.
‫In other words, security is as strong as the weakest link, right?
‫So when it comes to networking, layer two is one of the weakest links.
‫The protocols developed in the early years of the internet did not require a quality of service que
‫os, for example, short delays in the protocols could be ignored.
‫So the key principles of information security, CIA triad, confidentiality, integrity and availability
‫were not integrated into the protocols or they are really weak so we can classify the network and data
‫link layer attacks according to the effects of the attacks.
‫Right.
‫So these classes are denying the traffic between two hosts sniffing or listening to the traffic, compromising
‫the transferred data and spoofing.