What are two attributes of a VLAN?

What are two attributes of a VLAN? (Choose two.)

A.
A VLAN defines a collision domain.

B.
A VLAN defines a broadcast domain.

C.
Broadcasts are flooded to all VLANs.

D.
Collisions are flooded to all VLANs.

E.
A Layer 3 device is required to route packets between VLANs.

F.
A Layer 2 device is required to route packets between VLANs.

Explanation:
“In computer networking, a single layer-2 network may be partitioned to create multiple distinct

broadcast domains, which are mutually isolated so that packets can only pass between them via
one or more routers; such a domain is referred to as a virtual local area network, virtual LAN or
VLAN.”
“A router (Layer 3 device) serves as the backbone for network traffic going across different
VLANs.”
http://en.wikipedia.org/wiki/Virtual_LAN