Purpose of Portal cookies

Document ID : KB000115533
Last Modified Date : 25/09/2018
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Would like to know the purpose of each of the cookies used when a user accesses the portal website.
Portal EE 4.2.*
AWSELB - Amazon load balancer cookie. Infrastructure 
JSESSIONID X 2 - Jetty/Adobe AEM session cookies. Portal App 
PD-JSESSIONID - Jetty Session cookie. Portal App 
cq-authoring-mode - Adobe AEM authoring mode flag 
gateaugage - Login token for Portal App 
login-token - Encoded login token for Portal App 

We do not set max age/expiry on the cookies and expect them to be discarded after browser process is terminated.