i cannot understand a part of this simple structure!!!!

here is a structure in microchip tcp stack file "StackTsk.h"
typedef struct _MAC_ADDR
{
BYTE v[6];
}MAC_ADDR;

what is the purpose of red area _MAC_ADDR . normally we have to create instance using
MAC_ADDR RemoteMac;
then y author used above red text.
Thanks in Advance.
AB Sami.

The structure type is _MAC_ADDR

the MAC_ADDR is an instance of it.

he could have used


by giving the structure type a name he can create other instances of it as needed elsewhere in the program.