Exam MS-720 topic 2 question 3 discussion

Definetely A. Forget marking, QoS and DSCP... it's Microsoft Exam about a CLOUD solution. QoS won't help you a bit if you're using the Internet... you're doing too many assumption guys, stick to facts. A new network region for a new site, which has 1.5Mb connection. Nothing is said about topology! No MPLS, nothing... QoS would have helped there but that's not the case. It's safe to assume that this capacity is the Internet connection, and how do you preserve bandwidth there? By disabling video. It's that simple.

Tagging all traffic with a Differentiated Services Code Point (DSCP) value of 46 is a common practice to prioritize voice traffic over other forms of traffic on a network. By tagging voice traffic with a DSCP value of 46, it is given priority in routing and ensures that it has adequate bandwidth and low latency to provide a good voice experience. The other options are not directly related to improving the voice experience at a site with a 1.5 Mbps connection

sorry i take back my last comment, this is the most brilliant and tricky question. The keyword here is "site" bandwidth is 1.5 Mbps not user's bandwidth, video requires a minimum of 150 kbps per user's call so the bandwidth can't handle even 10 video calls concurrently. Disabling video would be the only solution to ensure audio calls can go on (atleast 25 audio calls can go on in recommended 58kbps per user)

C is the only diplomatically correct "ensure" option here. Microsoft should be penalized for stupid options seriously.

Going with B on this one!

In this exact case, the correct answer is A. If there is a meeting policy applied, then users will have the video restriction everywhere, not only in that single office.

I'd say B: https://learn.microsoft.com/en-us/microsoftteams/prepare-network

B- Correct bc the instructions talk about 1.5-Mb internet connection which is 1,500 Kbps. A- Even if it makes sense to disable video to preserve audio is NOT part of the requirements so don't assume stick to facts C- Test tool informational only D- All traffic cannot use the same tag otherwise whats the point of QOS? , MS Teams suggests 46 Audio, 34 Video, 18 Sharing Question 30 has the same answer

This is a very tricky question, both A and B can potentially be the correct answer depending on how you interpret the question. It asks "You need to ensure that ALL USERS AT THE SITE have a good voice experience". I would say A is the correct answer, cause it asks for ALL USERS, the roaming policy will basically ensure everyone not just the site user but also users visiting the site will have good Audio as the roaming policy will override any media bit rate settings done on the meeting policy. While 'B' refers only to users assigned with that policy, if you have other users coming into the site that is not assigned with the same policy they can potentially have bad audio quality due to the site bandwidth limitation.

Correct answer is A why? The question stated that the site must have a good "voice" not "meeting" experience so Video is irrelevant in this context. MSFT desc "The Teams NetworkRoamingPolicy cmdlets enable administrators to provide specific settings from the TeamsMeetingPolicy to be rendered dynamically based upon the location of the Teams client." so if you answer "B" - you're restricting the bandwidth for users at ALL locations and not only at this site and you cannot manage it dynamically, you as you need to change the policy manually as users change location and all Admins know that this is not feasible for large organizations.

B nothing about video

A is the correct answer

Teams will dynamically throttle video bitrate since it knows the connection speed.

Min bandwidth for MS video is 150/150 kB, Recommnded is 1500kB. 1500 is more than suitable for a video call.

B- Correct as you are telling the software the amount of bandwidth available A- Why would you disable video, Let the software dynamically adjust the bitrate. C- Test tool is informational only D- 46 is reserved for voice. If you ad video to 46 it will destroy the audio in the call also. Video should be 34

It should be B Microsoft Teams will dynamically optimize for the best experience it can give based on the bandwidth available. If the Teams client detects packet loss or other network issues, it will ramp down audio and video quality. If the network is uncontested, it will optimize for quality and use more bandwidth. Microsoft Teams does have an option to limit the average bit rate of calls and meetings, this is called the Media bit rate (MBR). https://docs.microsoft.com/en-us/learn/modules/plan-optimize-network-performance-for-teams-phone-system/3-design-network-media-optimization

Maybe controversial, but I'd vote B here. I don't know why you would want to limit or remove video completely when you can reduce the bandwidth limits. By limiting the site to the recommended one-to-one 1.5Mbps, they could at least do some video and screen sharing, but would also ensure voice should work too. Might be wrong, but seems plausible. See https://docs.microsoft.com/en-us/microsoftteams/prepare-network#bandwidth-requirements . This specifically talks about 1.5Mbps "Teams is always conservative on bandwidth utilization and can deliver HD video quality in under 1.5Mbps."