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So let's talk a little bit about the network and data link layer security, why is it important and

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how can we classify the network layer attacks, et cetera?

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When the OSI model was introduced, there is no thinking of any type of security, security just wasn't

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part of the design of either the USA or TCP IP models.

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Further, while there may be ozone layers, there are not necessarily protocols that correspond to them.

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Oh, yes, I was built to allow different layers to work without knowledge of each other, so any compromise

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in lower levels directly affects the higher level.

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As a result, a system is as secure as its weakest link.

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In other words, security is as strong as the weakest link right to when it comes to networking, layer

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two is one of the weakest links.

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The protocols developed in the early years of the Internet did not require a quality of service kiosk,

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for example, sure, delays in the protocols could be ignored.

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So the key principles of information security, CIA triad, confidentiality, integrity and availability

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were not integrated into the protocols or they are really weak.

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So we can classify the network and data link layer attacks according to the effects of the attacks.

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Right.

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So these classes are denying the traffic between two hosts, sniffing or listening to the traffic,

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compromising the transfer data and spoofing.