I manage a network with about 65 users, and we have recently setup a BYOD (Bring Your Own Device) network...in addition to our primary, private network (DS3/MPLS). Our BYOD network is growing in size...and while I keep it locked with a WPA2 password, I also use a mac filter to only allow in authorized devices. This filter IS NOT my primary means to keep this secure...so I really don't need a lesson on why I should or shouldn't implement a mac filter. This is simply a deterrent against avg. every day users from keeping their 'unregistered' devices off our network. So please....I don't need to hear about how easy it is to bypass a mac filter. Quite frankly...if someone that works for my company has enough know how to spoof a mac address...then all the power to them...they can get on that network What I need to know is, is there a limit on the number of addresses you can add. Many routers have a limit on this. D-Link is 25...Linksys, 30 or 35. I'm using a Netgear N-600 right now, which has no limit at all...and there are 42 registered devices on that ACL/filter. The other question I have is...does the latest Airport Extreme router have a 'guest' network (I believe I read it does....as do most home-based routers)...however, what I need to know is, is there a way to put a cap on the bandwidth for that built-in guest network. So, for example...we're using a 50Mbps business cable modem for this BYOD network. I'd like to be able to setup an additional guest network for the occasional visitor to our office...and not have to worry about adding them to the ACL. But I'd also like to set the maximum download speed for those users to, say 1 or 2 Mbps. Thus, keeping those who are using the BYOD network off the real 'guest' network, due to the slower speeds. So...that's what I need to know...from someone who has one of these latest model routers. 1) Maximum number of addresses that can be added to the ACL/mac address filter - yes or now/how many if yes....and 2) can you setup bandwidth limit (using QOS maybe?) for the built-in guest network. My current router does support the unlimited mac address filter...but does not support a bandwidth management utility for the guest network. Thanks in advance for your replies.