Which of the following does NOT contain additional shielding like meshes or aluminum foil?

In the context of networking cables, unshielded twisted pair (UTP) does not contain additional shielding materials such as meshes or aluminum foil. UTP cables consist of pairs of wires twisted together without any external shielding, which makes them lighter and less expensive to produce than shielded cables. This design is adequate for many applications, especially in environments where electromagnetic interference (EMI) is minimal and the transmission distances are moderate.

In contrast, shielded twisted pair (STP) includes layers of shielding to help protect the signals from interference, making them suitable for more electrically noisy environments. Similarly, options like braided shield and solid shields incorporate their own additional protective layers, enhancing their resistance to interference. Therefore, UTP stands out as the correct answer because it is designed specifically to operate without the benefits of shielding, relying instead on the twisting of the wires to reduce crosstalk and interference.