Your Company has installed IP phones. Both the phones and the office computers connect to the same device. The phone traffic and the office computer data traffic must be on different networks to ensure maximum throughput for the phone data. Which network device can be best connected to the phones and computers, and which technology will be performed on this device? (Choose two.)
A.
hub
B.
router
C.
switch
D.
stp
E.
subinterfaces
F.
VLAN
Explanation:
You can configure VLANs on the switch to distinguish two types of data traffic.
The question states that the phone traffic and the office computer data “must be on DIFFERENT NETWORKS.” When I think of different networks, I think of layer 3. When I think of layer 2 switching and VLANs, I think of the same NETWORK segment with it’s data types segregated by VLANs. And since they were nice enough to provide a viable layer 3 alternative pairing in the question (Router & Sub-interfaces), this is what I would think they want the answer to be based on the way in which they’ve phrased the question.
That being said, I do agree that switches and VLANs are a better way to segregate phone and computer traffic; But the question should have been worded more clearly. For example: “The phone traffic and computer data traffic must be segregated.” “The phone traffic and computer data traffic must not touch.”
This way, both the layer 2 and layer 3 methods are still viable answers, but the test taker must pick the more efficient one.
I really hate the way they phrase their questions. One moment you’ll get an answer wrong because of a keyword in the phrasing of the question, so you train your brain to look out for subtleties in the phrasing indicating how they want you to answer a question, just to have it not apply sometimes, and apply other times. Not a fair assessment of my abilities.