The value in the cookie can be used for authentication.

The value in the cookie can be used for authentication purposes.

A cookie can't hurt, though.

But a cookie doesn't matter.

So SYN Cookie can resist SYN Flood attack effectively.

Thereby effectively resisting SYN Flood attacks.

The cookie can be used to identify a particular tenant or user from a tenant.

Cookie can be used to identify a specific tenant or tenant's user.

Cookie can greatly extend the function of application based on client/ server, and now cookie is used on the internet widely.

Cookies can greatly expand the capabilities of Web-based client/server applications. At present, Cookie technology has been widely used in Internet.