MEF SDWAN Mock Exam

A new Subscriber is concerned about the performance of their service.  They have several Audio/Visual Applications that are sensitive to Delay and Delay Variation. The Subscriber makes the following requests:

·      Immediate notification if any Performance metric EXCEEDS its threshold value for half or more of any 6 periods.

·      All Performance metrics should be calculated over a period of 50 ms.

 

How should the Service Provider respond?

• • Set up Stateless Threshold Crossing Alerts (TCA)

  • Configure the TCA Window Size = 6

  • Configure the PM Metric Calculation Interval for 50 ms

• • Set up Stateful Threshold Crossing Alerts (TCA)

  • Configure the SET-TCA Windows Threshold = 3

  • Configure the TCA Window Size = 6

  • Set the PM Metric Calculation Interval = 50 ms

• • Set up Stateless Threshold Crossing Alerts (TCA)

  • Configure the SET-TCA Dampening Factor = 6

  • Configure the PM Metric Calculation Interval for 50 ms

• • 
    Set up Stateful Threshold Crossing Alerts (TCA)

  • Configure the SET-TCA Windows Threshold = 3

  • Configure the TCA Window Size = 6

  • Set the PM Metric Calculation Interval = 100 ms

You need to size Underlay Connectivity Services for 2 remote sites and a Headquarters laid out in a hub and spoke design.  The customer requires: 

• All traffic flows between remote sites and headquarters only. 

• 100 Mbps of traffic each way between each remote site and the headquarters. 

• One Public and one Private Underlay will be configured at each site, with 80% of the traffic on the Public and 20% on the Private at each location. 

• Both Underlays are available to all traffic in case of failure. 

Which is the best choice for sizing?

• • Provision 50 Mbps for the Public Underlay and 50 Mbps for the Private Underlay at each remote site.

  • Provision 200 Mbps for the Public Underlay and 200 Mbps for the Private Underlay at headquarters.

  • Set PUBLIC-PRIVATE service attribute to Either in SWVC policies.

• • Provision 100 Mbps for the Public Underlay and 100 Mbps for the Private Underlay at each remote site. 

  • Provision 200 Mbps for the Public Underlay and 200 Mbps for the Private Underlay at headquarters.

• • Provision 100 Mbps for the Public Underlay and 100 Mbps for the Private Underlay at each remote site.

  • Provision 160 Mbps for the Public Underlay and 40 Mbps for the Private Underlay at headquarters.

• • Provision 80 Mbps for the Public Underlay and 20 Mbps for the Private Underlay at each remote site.

  • Provision 160 Mbps for the Public Underlay and 40 Mbps for the Private Underlay at headquarters.

  • Set the BACKUP service attribute to Enabled in SWVC policies.

A legal firm is upgrading from a legacy network of IP VPN MPLS to SD-WAN to improve availability.  They wish to implement it over only Internet UCSs.  Each location of the firm is rented and has a copper line provided.  The leases do not allow additional physical installations. 

 

What do you recommend for UCS access links?

• A DSL link and a PON link from different providers

• Two PON links from a single provider

• A DSL link and a LTE access from the same company

• Two PON links from different providers

Which of the following can filter Application Flows down to the application component level?

• SD-WAN Controllers

• SD-WAN Orchestrator

• IDS Systems

• DPI Firewalls

What is an advantage of SD-WAN versus traditional WAN?

• Increased bandwidth

• Highly Available WAN

• Greater application performance

• Higher WAN utilization

What is responsible for the bigger picture, ensuring that policies are implemented throughout the infrastructure?

• Service Orchestrator

• SD-WAN Gateway

• SD-WAN Edge

• SD-WAN Controller

A Subscriber has an SD-WAN Service connecting its offices.  They have a strict requirement that Application Flows are forwarded over Paths that do NOT exceed a given One-Way Mean Packet Delay as defined in PERFORMANCE Policy Criterion in the associated Policies.  How should an SDCP advise their Service Provider to monitor the TVCs’ performance to ensure this?

• • Use an Ingress Service Readiness Measurement Point that is located after where the Policy is enforced.

  • Use an Egress TVC Measurement Point that is located after where the Policy is enforced.

• • Use an Ingress Service Readiness Measurement Point that is located before where the Policy is enforced.

  • Use an Egress TVC Measurement Point that is located before where the Policy is enforced.

• • Use an Ingress TVC Measurement Point that is located before where the Policy is enforced.

  • Use an Egress TVC Measurement Point that is located after where the Policy is enforced.

• • 
    Use an Ingress TVC Measurement Point that is located after where the Policy is enforced.

  • Use an Egress TVC Measurement Point that is located before where the Policy is enforced.

A bank encrypts SD-WAN Application traffic using TLS encryption. They wish to block restricted Social Media sites.

 

What security function should be used?

• MD+R using IPPF (Malware Detection and Removal using IP, Port, and Protocol Filtering)

• MD+R using DNF (Malware Detection and Removal using Domain Name Filtering)

• MBF using IPPF (Middle-Box Function using IP, Port, and Protocol Filtering)

• MBF using URLF (Middle-Box Function using URL Filtering)

The OSS/BSS Applications and Service Orchestrator communicate via which LSO interface?

• Adagio

• Presto

• Legato

• Cantata

What is a requirement of Service Readiness Criteria (SRC) in determining if a Service Readiness Test (SRT) passes or fails?

• Subscribers take precedence over the Service Provider whenever a mismatched SRC occurs.

• SRCs are used only by the Service Provider and are not utilized at the Subscriber.

• The Service Provider take precedence over the Subscriber whenever a mismatched SRC occurs.

• The SRC MUST be agreed to by the Subscriber and Service Provider.