Dante Level 2 Test Questions and answers

How does precision time protocol (PTP) work in dante devices? The clock leader dstributes a very accurate date-time reference. Each follower derives the required sample rate or frame rate from this leader. What is the golden rule for commissioning redundant networks? Work on one network at a time, verify that devices are not set to switched mode How much switching capacity is needed for a switch with 10 1 Gbps ports? 20 Gbps-10 Gbps both ways on each port When would be a good time to consider engaging QoS? Whenever 100 Mbps dante devices are on the network When ports begin to approach saturation, around 60-80%. When we have traffic on a converged network, so there is something to de-prioritize How many switches should be IGMP querier? Only one DSCP values range from 0-63. What is that used for in QoS? When configuring the switch, you can determine which DSCP values will lead to which queue. How can you monitor Dante traffic performance? Dante controller latency screen-shows packet arrival times. Counts as a late packet if it doesn't make it within the latency window. When should IGMP snooping or any multicast management be considered for a dante network? When the estimated multicast bandwidth may approach a network ports saturation point, impacting performance. TCP vs UDP TCP: A connection with delivery verification. Good for general internet traffic where dropped packets are likely. UDP: One way transmission with no delivery verification. Suitable for LANS where traffic is under your control and interruptions are unlikely. Preferred for real time networks for lower overhead and lower latency. What happens when a multicast packet is sent on an unmanaged network? The multicast packet will propagate to every port on the network-will behave similarly to broadcast. What is a converged network? A network that carries multiple and possibly unrelated data types (such as internet, VoIP, dante, etc.). Describe a broadcast network transmission A broadcast message transmits from one to device to everyone on the network. Is queue number priority low to high or high to low? High to low number (higher numbers have highest priority) multicast vs broadcast vs unicast multicast: on to many, with IGMP snooping unicast: one to one Broadcast: one to all What setting in dante controller must be check off if a device is chasing an external clock? external clock checkbox Which is the most influential factor when deciding which device you want to be clock leader (if not following automatic process)? Preferred leader checked Is unicast or multicast the default behavior for dante? unicast When a dante preset is saved, where is the information kept? In an XML formatted text file. Cam be shared to other users. Describe how primary and redundants are set up relative to each other Primary is coming from primary port on dante devices, secondary on secondary port or redundant port. Both are in their own separate subnet AND broadcast domain. What advantage does unicast have over multicast? unicast is simpler to deliver, reducing strain on the switch Unicast can achieve lower latency than multicast (minimum latency for multicast is 1msec). Unicast can cross a router, multicast can not How much bandwidth does a unicast audio flow use? 6 Mbps 4ch, 24 bit, 48kHz, 1msec latency If a transmitting device runs out of flows, what should you do to enable all subscriptions to be made? Flip streams to multicast so it only takes one flow for multiple destinations. Can dante controller apply information in a dante preset to a different device? Yes whats the total latency if a unicast subscription is made between two dante devices, transmitter latency of .25 msec and receiver of .5 msec, whats the total latency? .5 msec-if the transmitting device and the receiving device have different latencies, the higher latency setting will be used. Minimum latency for multicast 1msec