I agree, but a little nitpick: A sequence of bytes does not have a defined endianness. Only groups of more than one bytes (i.e. half words, words, double words or whatever you want to call them) have an endianness.

In practice, most projects (e.g. the Linux kernel or the socket interface) differentiate between host (indeterminate) byte order and a specific byte order (e.g. network byte order/big endian).