[Description] Tells the server that it’s sending authentication credentials of a certain type, e.g.: Authorization: Basic BTxhZGRpbjpbcGAuINMlc2FtZC== [Name] 
Authorization
C o o k i e
H o s t
R e f e r e r
A u t h o r i z a t i o n
U s e r - A g e n t
A c c e p t
A c c e p t - E n c o d i n g