What is sticky session load balancing, and how does this relate to the concept of session affinity?

This is a complex question since it asks you about one technology and then requests that you compare it to another similar one. You can frame your response by first defining sticky session load balancing and then briefly defining session affinity. You can follow this by pointing out how these two concepts relate to each other and their differences.

"A sticky session is a popular load balancing technique that requires a user session to be served by an allocated server. Normally, a load-balanced server stores user information in a session. It makes the session data available to all servers. Sticky sessions avoid this by always serving a particular user session request from a single server. The server becomes associated with a session as soon as it is created. All the requests in a particular session are always redirected to the designated server. This is typically accomplished using the sessionId cookie. The cookie is sent to a client on the first request. Every ensuing request by the same client must contain the same cookie."