In which format are NetFlow records stored?

Base 10 (decimal) is a human-readable numbering representation, not a data storage format used by NetFlow.

ASCII is a text-based character encoding that is too verbose and inefficient for storing high-volume network flow telemetry.

NetFlow records are stored in binary format because it provides a compact and efficient representation of IP flow data. Binary encoding minimizes record size and enables fast processing by flow collectors and analyzers. This format is defined by Cisco's NetFlow protocol specification and used across all NetFlow versions.

Hexadecimal is a notation used to display binary values in a readable form, not the underlying storage format of NetFlow records.