VLAN in CAS

[hkphantomgtr]

Hi, pals,

I just came across this "function" in about a month ago.  Being a layman to IT, please excuse for my ignorance to VLAN, and correct me if I used the terms incorrectly.   

I wonder that, in CAS,:
1) Would setting up a VLAN reduce or increase the latency of the switch/router, so to the CAS system?
2) Would that reduced port broadcasting activity be "heard"?

Anyway, so happen my ASUS router was dead in last week and I brought a CISCO RV340W router, together my previous CISCO SG350 switch.  I'm try to build some VLAN in them, to isolate streaming TV box, streaming TV set, CAS, daily use PC, and so and so.

Here is my set up. 


I'll appreciate any suggestion or comment to my VLAN concern.  Thank you very much and Happy Listening.