How TCP and UDP influence NATs
Assume that new transport layer protocols, not together from TCP and UDP, are invented and implemented. Describe how would that influence the existing NATs and why?
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When any new transport layer protocol is designed it has to take care of certain things to pass through NAT clearly.
NAT implementations use timers to guess the end of sessions. In case of TCP/UDP appropriate care is taken to mark the beginning and end of sessions, NATs should have proper mechanism to identify the same in the newly designed protocol.
The protocol which do not pass any additional addressing information in the payloads of the packets are easier to support in NAT environment. If the newly designed protocol carries this information NAT will not be able to pass it clearly.
If some applications are designed using this new protocol it has to take care of many issues like resource utilization on NAT gateway, security considerations etc.
Search Strategies in model checking: Model checkers such as JPF and SPIN support a number of search strategies used to explore the state space of the program. Two of these strategies are the most well-known—Depth-First Search an
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Greedy Best-First Search: It uses a heuristic that attempts to predict how close the end of a path is to the goal state, so that paths which are judged to be closer to the state are explored first.
What is the work of postfield tag?
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