Dante Level 3 Exam Solved 100% Correct!!

Dante Level 3 Exam Solved 100% Correct!! SCENARIO: You have a Dante system that seems to be functioning correctly, there are no external word clocks configured, no preferred master configured, but there are still a number of devices that report they are losing sync occasionally. What steps would you take to find the root cause of the problem? -You suspect that multicast traffic is not able to traverse the network in both directions (i.e. from master to all slaves, and from all slaves to the master). To check if this is the case you enable unicast delay requests on the slaves, then monitor the clock status histogram for evidence of disruption in PTP. When this resolves the problem you suspect that ACLs blocking multicast on UDP ports 319 and 320 in a direction from the slave to the master is to blame. -If IGMP Snooping is enabled, you test the system with no audio and IGMP Snooping turned off. When this resolves the problem you suspect that IGMP snooping has been interfering with the distribution of multicast traffic between the slaves and the master. You enable unicast delay requests on all slaves to reduce the amount of multicast traffic that the switches need to track via IGMP. Switches look at ________ Destination MAC addresses to forward frames Things to consider when building a network from scratch: Sizing links for worst case traffic loads Dante automatically changes a unicast flow to a multicast flow when necessary. False Dante uses ______ DSCP tags. 4 Apart from separate cabling, a ________ can be used to separate broadcast domains. VLAN In a [________] transaction bandwidth is only consumed on the [________] path between a receiver and a transmitter. unicast, shortest A session is ________ an instance when a connection between two devices is created to transfer data A Dante device can have an unlimited number of receive flows. False How do you find out how many transmit flows you are using? Tx tab in Dante controller An ARP whohas message is ________ Broadcast Giving an external word-clock to a Dante device replaces its internal clock. False IGMP snooping listens for reports to [________] messages in order to restrict [________] traffic. IGMP query, multicast ARP tables are held in nodes True Match these layer numbers to the corresponding layer names in the OSI model: Layer 7 - Application Layer 6 - Presentation Layer 5 - Session Layer 4 - Transport Layer 3 - Network Layer 2 - Datalink Layer 1 - Physical Dante devices have a set number of flows. True A Dante receiving device has a latency setting of 1ms. A Dante transmitting device has a latency setting of 250µs. If a subscription is created between these units, when will the audio playout of the receiving device? 1 milli seconds Sync traffic is the most time critical traffic in a Dante network and is tagged with DSCP ______. 56 How many channels are contained in a Multicast Flow? Up to 8 The BEST way to bring up a redundant network online is: Bring the primary network online first, ensure all devices appear functional, check that devices are configured to operate in redundant mode, then bring the secondary network online. What steps need to be taken in order to segment a broadcast domain? (select all that apply) -Put the same type of devices into a VLAN -Define VLAN as an IP subnet SCENARIO: You notice that audio on your Dante network is not working as it should, but only when multicast transmission is configured for audio. Your audio network is on a converged enterprise network. After testing your Dante network, you conclude that a firewall is dropping your multicast packets. What port would you ask the IT administrator to unblock? UDP 4321 A unicast flow is created by a transmitter alone. False Switches can have multiple MAC addresses mapped to an interface in their MAC address table True An application has a port/socket address which pertains to a transport protocol , which in turn is encapsulated into a packet, which has a/an [________] , which is then encapsulated into an address frame which has a/an [________] . IP address, MAC address Requirements of Dante are completely satisfied by a COTS infrastructure True What is the result of the following situation: Music is playing through a Dante system that is using an external word clock. The word clock is connected to a single Dante device, which has "Enable Sync to External" and "Preferred Master" checked in the Dante Controller Clock Status tab, and is also correctly configured in the hardware settings of the device. The word clock gets disconnected and... ...the sound of silence becomes readily apparent because the Dante devices mute due to the loss of sync. (Clock master trying to chase the disconnected word clock) A switch connects its interfaces together by referencing its [________] . MAC address table? You have purchased a Dante-enabled device with a Brooklyn2 inside. How many unicast flows are needed to transport 64 audio channels? 16 flows QoS protects against too much bandwidth being used on a link. False A reply to ARP whohas message is Unicast It is recommended for the backplane of a switch to be able to accommodate full bandwidth use of all ports in both directions. True Dante uses ______ for clocking. PTP SCENARIO: Your Dante network is live. When you power up Dante controller on your laptop, you notice that only device names seem to show, and you are unable to see channel names. What is the likely cause of this? Anti-virus firewall or other security software Collision domains are a practical concern on a switched network False What is the key aim of a network? Interoperability A [________] can either permit or block a/an [________] or a port on a particular transport protocol. firewall, IP address A network is a group of devices that connect and can interoperate together. True The CPU in a switch can slow down multicast traffic when IGMP snooping is enabled True Switches can [________] data if there is contention on an interface. queue OSI model is a __________. Conceptual model When a Dante enabled device is plugged into a network, how does the Dante Controller discover it? By listening to the device's announcement using mDNS QoS protects against unexpected temporary peaks in bandwidth that may affect time critical services. True A Dante receiving device has a latency setting of 1ms. A Dante transmitting device has a latency setting of 2ms. If a subscription is created between these units, when will the audio playout of the receiving device? 2 milli seconds ARP stands for Address Resolution Protocol The amount of bandwidth used by a multicast flow vary based on number of channels. True All managed switches come from the factory with all of their configuration settings disabled. False Traffic on the public internet is unicast True How much bandwidth does a unicast flow at 48KHz/24-bit sample rate use? 6mbps Dante requires strict priority queuing when QoS is used. True Dante is best used on switches with at least_______ queues. 4 SCENARIO: You have a Dante system installed in which you can see more than one device reported as clock master in the clock status tab of Dante Controller. There are no layer 2 tunnels, or any other 'advanced' configuration in the network. You also notice that devices are reporting that they lose sync occasionally. What steps would you take to find the root cause of the problem? (SELECT ALL THAT APPLY) -Check switch configurations for any evidence of ACLs being configured. Check that all PTP traffic can traverse the network in both directions to all switches - specifically UDP ports 319 and 320 on 224.0.0.129 -If IGMP snooping is enabled, you test the system with no audio and IGMP snooping turned off. When this resolves the problem you carefully examine the IGMP snooping configuration in each switch and ensure that they follow the guidelines. From a link bandwidth use perspective, Unmanaged multicast domain behaves like: Broadcast Dante is an example of ________________ network service Real-time Detailed understanding of the OSI model is required to design a Dante network. False You have a four-channel Dante to analog output device which uses the Ultimo chip. Which of the following subscriptions are valid? (select all that apply) -Subscribing four channels from a single transmitting device. -Subscribing two channels each from two different transmitting devices. -Subscribing three channels from a single transmitting device and a one channel from another.