Pub/Sub and P2P question

[Gurumurthy Ramamurthy]

Which statements describe Publish-Subscribe Messaging and which describe Point To Point Messaging?

APublish-Subscribe Messaging is a message queue system.
BPublish-Subscribe Messaging = One sender and one receiver.
CPoint To Point Messaging = N senders and one receiver.
DPublish-Subscribe Messaging = 1 sender and n receivers.
EPoint To Point Messaging is a message queue system.
FPoint To Point Messaging = One sender and one receiver.


Choices D and F are correct.

But, Guys, why option �E� is wring? Because P2P is based on a virtual channel called Queue. So, isn�t a message queue system???

Thanks,
Guru