The lab’s `nslookup` tests are intended to prove that hosts at `10.10.10.20` and `10.10.10.30` are online.
Answer
false
Explanation
The lab explicitly notes that the example names and IP addresses are not pingable because no devices have those addresses assigned. The purpose of `nslookup` is to verify the lookup process and the records configured in DNS, not to test whether a host is powered on or reachable. A DNS response can be correct even when no device is using the returned address. **Key takeaway:** `nslookup` verifies name-service data, not endpoint availability.\n\n**Glossary:** **DNS record**: Data stored in DNS for a name or address. **Reachability**: The ability to contact a network endpoint. **Ping**: A separate network diagnostic that tests IP reachability.
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