What proximity card style offers advantages such as lower cost and on-board memory?

The correct choice highlights the strengths of a 13.56 MHz contactless proximity card, which indeed offers several advantages, including lower manufacturing costs and embedded memory capacity. This type of card operates using high-frequency radio waves, enabling it to communicate with a reader without requiring physical contact.

The lower cost associated with these cards comes from the relatively inexpensive production process when compared to more advanced card types. Furthermore, the inclusion of on-board memory allows these cards to store various types of data directly on the card itself, such as user credentials or access permissions. This feature enhances security and functionality because it permits the card to perform tasks without needing constant communication with a central database.

In contrast, other options like the 125 kHz contactless cards typically have more limited memory and do not integrate advanced features as well. Magnetic strip cards, while inexpensive, lack the robustness and durability of contactless options and require physical swiping, which is less convenient. Smart cards do carry onboard memory but are usually more costly and complex than the 13.56 MHz contactless cards, which positions high-frequency proximity cards as a particularly versatile and cost-effective solution in access control systems.