How many types of cookies are there?

There are two type of cookeies.
a) single valued eg request.cookies(”UserName”).value=”Vinod”
b)Multivalued cookies. These are used in the way collections are used.
e.g.
request.cookies(”CookiName”)(”UserName”)=”Vinod”
request.cookies(”CookiName”)(”UserID”)=”786?

Note:No value method in multivalued cooki