1. The "P" at the front indicates separate shielding, while the "P" at the back indicates overall shielding.
2. 2x1.0 cables are twisted first and then shielded. After shielding, they are cabled into 7 pairs of 2x1.0 cables. After cabling, the overall shielding is applied. This is exactly what you described.
3. For computer cables, separate shielding means shielding after twisting. Overall shielding means unshielding after twisting. A layer of tape (usually polyester tape) is wrapped around the cables and tied tightly before cabling. Shielding is applied after cabling. If the "P" in the model number is in the middle, it indicates separate shielding, such as DJYPVR. If it is at the end, it indicates overall shielding, such as DJYVP. If it is in the middle and at the end, it indicates separate and overall shielding, such as DYJPVP.
