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Welcome to the lecture on the security of computer networks this time we will look at the issues associated

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with the administration of computer networks in particular.

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We will examine the methods of real time monitoring of packets sent over local networks and other networks

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to where we use one of the most popular network monitoring tools Wireshark.

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We will explore why automatic intrusion detection systems are not going to replace manual ways of network

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traffic analysis and this module will answer the question how to control access to the network with

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firewalls.

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We'll get to know basic information about firewalls and their division.

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We will also say a few words on network intrusion detection and the limitations of both technologies.

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Then we will examine wireshark more closely and discuss its usefulness in detecting suspicious situations

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that take place on computer networks.

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Let's start.