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Cisco Meraki Solutions Specialist
500-220
Engineering Cisco Meraki Solutions (ECMS) v2.2 Questions and Answers

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Questions # 1:

Question # 1

Refer to the exhibit. What Is the ratio of internet-bound flows that route via WAN 1 compared with WAN 2?

Options:

All flows alternate in a 5:1 ratio.

All flows alternate in a 2:1 ratio.

All flows agrees via WAN 1:1 ratio.

All flows egress via WAN1.

Answer

Explanation

https://documentation.meraki.com/MX/Firewall_and_Traffic_Shaping/MX_Load_Balancing_and_Flow_Preferences#Load_Balancing

Questions # 2:

One thousand concurrent users stream video to their laptops. A 30/70 split between 2.4 GHz and 5 GHz is used.

Based on client count, how many APs (rounded to the nearest whole number) are needed?

Options:

Answer

Explanation

https://documentation.meraki.com/Architectures_and_Best_Practices/Cisco_Meraki_Best_Practice_Design/Best_Practice_Design_-_MR_Wireless/High_Density_Wi-Fi_Deployments

Questions # 3:

When an SSID is configured with Sign-On Splash page enabled, which two settings must be configured for unauthenticated clients to have full network access and not be allow listed? (Choose two.)

Options:

Controller disconnection behavior

Captive Portal strength

Simultaneous logins

Firewall & traffic shaping

RADIUS for splash page settings

Answer

A, B

Explanation

To clarify, when an SSID is configured with Sign-On Splash page enabled, the two settings that must be configured for unauthenticated clients to have full network access and not be allow listed are:

Controller disconnection behavior: This setting determines how the clients are treated when the Meraki cloud controller is unreachable. The options are Restricted or Unrestricted. The former option blocks all traffic from unauthenticated clients until the controller is reachable again. The latter option allows unauthenticated clients to access the network without signing on until the controller is reachable again1.

Captive Portal strength: This setting determines how often the clients are redirected to the splash page for authentication. The options are Block all access until sign-on is complete or Allow non-HTTP traffic prior to sign-on. The latter option allows unauthenticated clients to access other protocols such as DNS, DHCP, ICMP, etc., but blocks HTTP and HTTPS traffic until they sign on. This option is recommended for compatibility with devices that do not support web-based authentication1.

[Reference: https://documentation.meraki.com/MR/Access_Control, ]

Questions # 4:

Refer to the exhibit.

Question # 4

Which design recommendation should be considered?

Options:

A 25-percent throughput loss occurs for every hop. Cisco Meraki best practice recommends a 1-hop maximum.

A 25-percent throughput loss occurs for every hop. Cisco Meraki best practice recommends a 2-hop maximum.

A 50-percent throughput loss occurs for every hop. Cisco Meraki best practice recommends a 1-hop maximum.

A 50-percent throughput loss occurs for every hop. Cisco Meraki best practice recommends a 2-hop maximum.

Answer

Explanation

https://documentation.meraki.com/MR/Deployment_Guides/Mesh_Deployment_Guide

There will be a throughput reduction (~50% reduction) with each “hop” in a mesh. It is recommended that a mesh network be designed for no more than one mesh hop from the gateway to client device.

Questions # 5:

Refer to the exhibit.

Question # 5

Which condition or conditions will cause the "All Databases & cloud services" SD-WAN traffic to be routed via a VPN2 tunnel on WAN2?

Options:

WAN1 tunnel latency is 20 ms or less, irrespective of WAN2 tunnel performance.

WAN1 tunnel latency is 20 ms or more, and WAN2 tunnel meets the configured performance criteria.

WAN1 tunnel latency is 20 ms or less, and WAN2 tunnel meets the configured performance criteria.

WAN1 tunnel latency is 20 ms or more, irrespective of WAN2 tunnel performance.

Answer

Explanation

This is because the SD-WAN policy for “All Databases & cloud services” has the following settings:

Uplink selection policy: Prefer WAN1, Fail over if down

Traffic filters: Custom performance classes

Custom performance classes: Database

Database performance criteria: Maximum latency 200 ms, Maximum jitter 20 ms, Maximum loss 1%

This means that the SD-WAN traffic will be routed via WAN1 by default, unless WAN1 is down or fails to meet the database performance criteria. In that case, the traffic will be routed via WAN2, if WAN2 meets the database performance criteria. Therefore, the condition that will cause the traffic to be routed via WAN2 is when WAN1 tunnel latency is 20 ms or more (which exceeds the maximum jitter of 20 ms), and WAN2 tunnel meets the configured performance criteria (maximum latency 200 ms, maximum jitter 20 ms, maximum loss 1%).

Questions # 6:

Which type of authentication protocol is used when using OSPF on an MX appliance?