Both pictures are the same.
2ohm resistors are parrellel to each other. 6 ohm resisters are
parrellel to each other. The 2ohm resistors (both 2 of them) are in
series with the 6 ohm resistors (both of them).
A way to distinguish if they r series or parrellel is to look
the the flow of current. Assuming current coming from the LEFT
side, it split into 2 at the first T-junction, so current if equal
in both the 2 ohm resistors. Current then rejoin back together at
the next T-junction. Because of this split, both the 2 ohm
resistors are in parellel.
Total resistance in the curcuit will be:
[2ohm] R = 1/(1/2 + 1/2)
[6ohm] R = 1/(1/6 + 1/6)
[Total] R = 1/(1/2 + 1/2)+ 1/(1/6 + 1/6)
