Why does an 8-bit field have endianness?

Question

See the definition of TCP header in /netinet/tcp.h:

struct tcphdr
  {
    u_int16_t th_sport;         /* source port */
    u_int16_t th_dport;         /* destin         


        

Answer 1

Its possible that in this machine the endianess also refers to the bit order as well as the byte order. This wikipedia article mentions that this is sometimes the case.