Which two are requirements for a device to join a Cisco UC520 created community? (Choose two.)
Select exactly 2 answer(s) from the following:
A.
Cisco Configuration Assistant installed on user PCs
B.
teleworker access routers must be preconfigured with a VPN
C.
telnet disabled on the Cisco CE520
D.
HTTP(s) enabled on the Cisco CE520
E.
no use of IP addresses