N10-009 Network Implementation Practice Question

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

• ✓

  ipv6 nd prefix

  Why this is correct

  This command is applied on a router interface to specify the IPv6 prefix(es) that the router should include in its Router Advertisement (RA) messages. By advertising a prefix with the "on-link" and "autonomous" flags set (which are default for SLAAC), it instructs IPv6 hosts on that segment to use this prefix to automatically generate their own unique IPv6 addresses, thereby enabling Stateless Address Autoconfiguration (SLAAC). This is the fundamental mechanism for a router to provide IPv6 addressing via SLAAC.

• ✗

  ipv6 address autoconfig

  Why it's wrong here

  The "ipv6 address autoconfig" command is typically applied to an interface on an IPv6 host (or a router acting as a host on a segment) to instruct it to automatically generate its own IPv6 address using SLAAC. This command enables the client functionality to receive and process Router Advertisements, not the server functionality for a router to advertise prefixes to other devices. It's a client-side configuration for address acquisition.

  When this WOULD be correct

  This command would be correct in a scenario where a router interface needs to obtain an IPv6 address automatically via SLAAC from a neighboring router's router advertisements, such as on a downstream router in a hierarchical network where the upstream router provides prefix delegation.

• ✗

  ipv6 unicast-routing

  Why it's wrong here

  While "ipv6 unicast-routing" is a global configuration command essential for a router to forward IPv6 packets between different networks, it merely enables the IPv6 routing process itself. It does not, however, configure or advertise any specific IPv6 prefixes to local hosts for address autoconfiguration. Without an advertised prefix, hosts cannot use SLAAC to generate their addresses, even if IPv6 routing is enabled.

  When this WOULD be correct

  This command would be correct in a scenario where a router is not forwarding IPv6 packets, and the question asks which global configuration command enables IPv6 routing. For example: 'A network engineer needs to enable IPv6 routing on a router. Which command must be configured?'

• ✗

  ipv6 dhcp server

  Why it's wrong here

  The "ipv6 dhcp server" command configures the router to act as a DHCPv6 server, providing IPv6 addresses and other configuration parameters to clients. DHCPv6 is a stateful address assignment mechanism, or can be used in a stateless mode (DHCPv6 Lite) for options like DNS servers. However, Stateless Address Autoconfiguration (SLAAC) is inherently stateless and does not rely on a DHCPv6 server for address assignment; it uses Router Advertisements for prefix information.

  When this WOULD be correct

  This command would be correct in a scenario where the network engineer needs to provide IPv6 addresses and other configuration parameters (like DNS servers) to hosts using stateful DHCPv6, rather than relying on SLAAC for address assignment. For example, when the network requires central management of IP addresses or needs to deliver additional options beyond prefix information.

Option-by-option analysis

Why each answer is right or wrong

Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The N10-009 exam frequently reuses these exact scenarios with slightly different constraints.

Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”

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