I have only just started contrtibuting here so forgive me if you think I'm speaking out of turn, but I noticed that this question was put on hold https://networkengineering.stackexchange.com/questions/34958/https-relay-vs-https-proxy-pros-and-cons and then wondered whether this restriction was really in the best interests of the community.
I also refer to these:
The problem with this policy is illustrated by the proxies and loadbalancers questions. These elements are normally within the network discipline, if you remove network design from a load-balancer configuration then it will simply not work. What about application-aware firewalls and IPS? Are these networking devices?
Higher-layer protocols are part of networking in OSI. We see an increasing tendency to place session-layer functionality into what are traditionally seen as application layer protocols such as HTTP and SMB. Lets not forget that in OSI terms encryption is above layer-4, and we see this in the current prevalence of SSL over IPSec.
I guess that the real question for all networking professionals contributing to this forum is: For all these devices/disciplines in your own enterprise, do you want to be responsible for the design and implementation, or do you want to leave it to the server guys?