https://mary2point5.tumblr.com/

oh wait a minute...this might be a better one, dazzlenation....see previous post....go figure:

https://www.researchgate.net/profile/Lin_Xiang4/publication/284219579/figure/fig4/AS:668708309594132@1536443893873/System-model-Caching-and-buffering-at-the-relay-nodes.png