Web Science/Part1: Foundations of the web/Internet Protocol/IP forwarding algorithm/quiz

{Read the following article on Classless Inter-Domain Routing. Which are valid entries in a routing table? ++ 11.0.0.0 +- 12.3.1.1 ++ 192.162.2.0 ++ 192.162.0.0 +- 14.31.0.0 +- 14.31.0.1
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 * with CIDR | without CIDR

{CIDR is backward compatible + yes - no - it depends on the size of the routing table - Only for entries in the routing table that go through class A and B networks
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{A network device from a class A network receives an IP package with the destination IP address in a class B network. Which of the following is true? - The package will be send back to the source since no routing from class A to class B networks is possible - The package will be dropped since no routing from class A to class B networks is possible + If a route to the network of the destination adress exists the package will be routed. + If no route to the destination network exists the package will be send to the default route. + If the package cannot be routed there will be a forwarding error message send to the source.
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{An IP package is sent from host A to Z. It is being routed via B, C and D. Now network D cannot forward the package. Which of the following is true? - There will be an error send back to A. The route will be exactly via C and B. + There will be an error send back to A. The route is not quite clear. - A will certainly receive an error message that the package could not be forwarded.
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