Transaction validation process

[sourav6251]

Suppose you have 10 devices on the same network. At some point, 8 devices (C, D, E, F, G, H, I, J) go offline, and the remaining 2 devices (A, B) make a payment. After validating this payment, all 10 devices (A, B, C, D, E, F, G, H, I, J) go offline. Later, the 8 devices (C, D, E, F, G, H, I, J), which went offline before A and B made their transaction, come back online while A and B remain offline. During this time, the 8 devices (C, D, E, F, G, H, I, J) make some transactions. Finally, devices A and B come back online. How are all these transactions validated?