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70-246 · Question #150

Your company has a main office and 10 branch offices. The network contains an Active Directory forest named contoso.com. Each office contains domain controllers. You have a System Center 2012 R2…

The correct answer is D. An explicit discovery for the network devices by using SNMP. Explicit discovery using SNMP is the best method to monitor all ports on managed switches because SNMP provides port-level data and explicit discovery ensures all target devices are reliably included.

Configuring and Deploying System Center 2012 - Operations Manager

Question

Your company has a main office and 10 branch offices. The network contains an Active Directory forest named contoso.com. Each office contains domain controllers. You have a System Center 2012 R2 infrastructure that has Operations Manager and Service Manager installed. Each office has multiple VLANs. All switches are managed switches. Users in the branch offices occasionally call the help desk to report that they cannot access some of the network resources in the main office. You need to ensure that all of the ports on the switches can be monitored by using Operations Manager. What is the best configuration to achieve the goal? More than one answer choice may achieve the goal. Select the BEST answer.

Options

  • AA recursive discovery for the network devices by using ICMP
  • BAn explicit discovery for the network devices by using ICMP
  • CA recursive discovery for the network devices by using SNMP
  • DAn explicit discovery for the network devices by using SNMP

How the community answered

(30 responses)
  • A
    10% (3)
  • B
    3% (1)
  • C
    7% (2)
  • D
    80% (24)

Why each option

Explicit discovery using SNMP is the best method to monitor all ports on managed switches because SNMP provides port-level data and explicit discovery ensures all target devices are reliably included.

AA recursive discovery for the network devices by using ICMP

Recursive ICMP discovery traverses the network from seed devices but ICMP cannot retrieve switch port metrics, making it unsuitable for port-level monitoring regardless of discovery type.

BAn explicit discovery for the network devices by using ICMP

Explicit ICMP discovery specifies devices directly but still relies on ICMP, which only provides up/down availability data and cannot expose individual switch port statistics.

CA recursive discovery for the network devices by using SNMP

Recursive SNMP discovery starts from seed devices and walks the network via SNMP, but in a multi-VLAN environment it may not reliably reach or enumerate all switches across all VLANs, making explicit discovery the more controlled and thorough choice.

DAn explicit discovery for the network devices by using SNMPCorrect

SNMP (Simple Network Management Protocol) is required to retrieve interface and port-level statistics from managed switches; ICMP only tests reachability and cannot expose per-port data. Explicit discovery in Operations Manager means the administrator directly specifies the IP addresses or hostnames of the network devices to discover, ensuring all switches across every VLAN are included without depending on topology traversal. This combination gives complete, predictable, and port-level monitoring coverage for all managed switches.

Concept tested: SNMP explicit network device discovery for port monitoring in OpsMgr

Source: https://learn.microsoft.com/en-us/system-center/scom/manage-monitoring-network-devices?view=sc-om-2019

Topics

#network device discovery#SNMP#explicit discovery#switch monitoring

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