Why I get overlap when I add router and on one port I add 10.0.0.10 with subnet mask 255.0.0.0 overlaps with the other port that have on it  10.1.0.11 255.255.0.0 even it is 16 bit subnet mask and that 8 ? The second question is how I can ping on thi...

dear friends it is very strange that in packet tracer i can ping even both default gateway is wrong !!!the first PC have the other router port as default gateway and the second PC also but ping is working from the begin !!! why what is the reason ???...