Objective 1.8
N10-009Summarize evolving use cases for modern network environments.
Objective 1.8 sits in Networking Concepts, which carries 23% of the Network+ exam. The questions below are original, written from the official objective title above, and each explanation cites the CompTIA page it rests on.
Objective title verbatim from the official objectives. CompTIA exam page ↗
A worked example
Shown solved, with the whole explanation open: this is what every question here carries.
Which protocol allows IPv6 nodes on the same link to discover each other's presence, resolve link-layer addresses, locate routers, and confirm reachability?
Correct.
Checked against datatracker.ietf.org, July 2026Concept
Before a host can put a frame onto a shared segment it has to settle three things: who else is present, which hardware address stands behind a given network address, and whether that peer is still answering. Every address family assigns those jobs somewhere, and knowing where they live tells you what to inspect when a host has an address but no reachability.
Why B
RFC 4861 defines Neighbor Discovery as the protocol IPv6 nodes use for presence discovery, address resolution, router finding, and reachability confirmation on a shared link.
Source
RFC 4861: Neighbor Discovery for IPv6, checked July 2026This document specifies the Neighbor Discovery protocol for IP Version 6. IPv6 nodes on the same link use Neighbor Discovery to discover each other's presence, to determine each other's link-layer addresses, to find routers, and to maintain reachability information about the paths to active neighbors.
Now you: objective 1.8 questions
No account needed. The explanation opens when you answer.
Sample question 1 of 3
A network engineer troubleshoots an IPv6 host that cannot find the link-layer address of a directly connected neighbor before sending unicast traffic. Which message should the host send to resolve this address?
Sample question 2 of 3
A carrier gives new subscribers IPv6-only service, and a client on that service has to reach a legacy IPv4-only web server. Which pair of mechanisms carries that session?
Sample question 3 of 3
An engineer brings up an IPv6-in-IPv4 configured tunnel and leaves the static tunnel MTU at the value the specification recommends. What should the tunnel interface report?
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Read the sources
These are the official pages the questions above cite. Reading them is studying the objective from the primary source, which is what the explanations point you toward anyway.
More objectives in Networking Concepts
- 1.1 Explain concepts related to the Open Systems Interconnection (OSI) reference model.
- 1.2 Compare and contrast networking appliances, applications, and functions.
- 1.3 Summarize cloud concepts and connectivity options.
- 1.4 Explain common networking ports, protocols, services, and traffic types.
- 1.5 Compare and contrast transmission media and transceivers.
- 1.6 Compare and contrast network topologies, architectures, and types.
- 1.7 Given a scenario, use appropriate IPv4 network addressing.