What type of data is AES designed to encrypt?

AES, or Advanced Encryption Standard, is designed to encrypt information in fixed-size blocks of 128 bits. This block cipher operates by dividing data into blocks of this size for encryption, ensuring that data confidentiality is maintained. AES can securely handle data regardless of its original format, but its mechanism specifically revolves around the 128-bit block size, which is fundamental to how the algorithm functions.

While other types of data like audio, video, text, images, or large databases can indeed be encrypted using AES by segmenting them into blocks, the essence of AES encryption lies in its processing of data in these specific 128-bit sizes. Therefore, the focus of AES encryption being on the block structure clarifies why this is the correct aspect when identifying what type of data AES is designed to encrypt.