PCNSE · Question #108
YouTube videos are consuming too much bandwidth on the network, causing delays in mission- critical traffic. The administrator wants to throttle YouTube traffic. The following interfaces and zones are
The correct answer is B. Inbound profile with Maximum Egress. To throttle YouTube streaming (primarily download traffic) consumed by internal clients, the correct setting is the Inbound profile with Maximum Egress (B). Here's the logic: YouTube video data flows inbound from the Internet through ethernet 1/1 (Untrust) and then exits outbound
Question
YouTube videos are consuming too much bandwidth on the network, causing delays in mission- critical traffic. The administrator wants to throttle YouTube traffic. The following interfaces and zones are in use on the firewall:
- ethernet 1/1, Zone: Untrust (Internet-facing)
- ethernet 1/2, Zone: Trust (client-facing)
A QoS profile has been created, and QoS has been enabled on both interfaces. A QoS rule exists to put the YouTube application into QoS class 6. Interface Ethernet 1/1 has a QoS profile called Outbound, and interface Ethernet 1/21 has a QoS profile called Inbound. Which setting for Class 6 will throttle YouTube traffic?
Options
- AOutbound profile with Guaranteed Ingress
- BInbound profile with Maximum Egress
- CInbound profile with Guaranteed Egress
- DOutbound profile with Maximum Ingress
How the community answered
(19 responses)- A5% (1)
- B79% (15)
- C5% (1)
- D11% (2)
Explanation
To throttle YouTube streaming (primarily download traffic) consumed by internal clients, the correct setting is the Inbound profile with Maximum Egress (B). Here's the logic: YouTube video data flows inbound from the Internet through ethernet 1/1 (Untrust) and then exits outbound through ethernet 1/2 (Trust) toward clients. The 'Inbound' QoS profile is applied to ethernet 1/2 (the client-facing interface). Setting a Maximum Egress bandwidth on Class 6 in that profile caps how much YouTube traffic can exit toward clients, effectively throttling it. 'Maximum' limits bandwidth (throttling), whereas 'Guaranteed' reserves a minimum. The Outbound profile on 1/1 controls upload traffic going to the Internet, which is not the primary YouTube bandwidth concern.
Topics
Community Discussion
No community discussion yet for this question.