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New scenarios with Wireshark in communication technologies
Šíma, Jan ; Dvořák, Jan (referee) ; Jeřábek, Jan (advisor)
The aim of this thesis is to design and create scenarios that will be used by students as a basis for laboratory exercises in a course that focuses on communication technologies. These scenarios also need to be accompanied by a theoretical introduction that will introduce the topic under discussion to the students. The created scenarios contain additional tasks that are intended for individual work of students. For the teachers there are prepared separate files summarising the correct solution of these tasks. This thesis starts with a theoretical description of used network protocols. First the TCP/IP model is described and then the protocols that belong to this model. The main ones are those that occur in multiple created scenarios, such as TCP, UDP or DNS. The programs and applications that are used in the scenarios are also described. The main program is Wireshark and also the application called Klient DNS. This is followed by a chapter that deals with the drafting of each scenario. The drafts outline what the scenarios goals are. The drafts also list the protocols, programs, and utilities that are used in the exercise. The first scenario contains tasks based on Network Address Translation and its interaction with other protocols, such as the previously mentioned TCP, UDP, and also ICMP and FTP protocols. The second created scenario is dealing and analyzing protocols that try to secure the translation of domain names. Specifically, the DNSSEC extension and also the DoH protocol. The third scenario is focusing more in detail at the function of recursive servers in DNS and DNSSEC communication. The last created scenario explains the planning and allocation of the address space, where again the NAT topic is encountered and the function of routing tables is also explained here.
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New scenarios with Wireshark in communication technologies
Šíma, Jan ; Dvořák, Jan (referee) ; Jeřábek, Jan (advisor)
The aim of this thesis is to design and create scenarios that will be used by students as a basis for laboratory exercises in a course that focuses on communication technologies. These scenarios also need to be accompanied by a theoretical introduction that will introduce the topic under discussion to the students. The created scenarios contain additional tasks that are intended for individual work of students. For the teachers there are prepared separate files summarising the correct solution of these tasks. This thesis starts with a theoretical description of used network protocols. First the TCP/IP model is described and then the protocols that belong to this model. The main ones are those that occur in multiple created scenarios, such as TCP, UDP or DNS. The programs and applications that are used in the scenarios are also described. The main program is Wireshark and also the application called Klient DNS. This is followed by a chapter that deals with the drafting of each scenario. The drafts outline what the scenarios goals are. The drafts also list the protocols, programs, and utilities that are used in the exercise. The first scenario contains tasks based on Network Address Translation and its interaction with other protocols, such as the previously mentioned TCP, UDP, and also ICMP and FTP protocols. The second created scenario is dealing and analyzing protocols that try to secure the translation of domain names. Specifically, the DNSSEC extension and also the DoH protocol. The third scenario is focusing more in detail at the function of recursive servers in DNS and DNSSEC communication. The last created scenario explains the planning and allocation of the address space, where again the NAT topic is encountered and the function of routing tables is also explained here.
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