Assuming that two computers within the same local area network (LAN), a set to 192.168. No. 1, mask 255.255.255.0, another set to 192.168. No. 129, mask for 255.255.255.128, two are not set gateway, use ping to test connectivity between each other, what is the output? Why is that? (experiment can have a try, under observation results, and think about the reason