技術者がローカル企業ポータルにログインしようとしています。技術者がアドレス バーに URL を入力すると、ブラウザは Web ページを解決して表示できません。技術者は別のワークステーションで試しますが、結果は同じです。他の Web ページには問題はありません。技術者が最初に確認すべきことは次のうちどれですか?
正解:D
Explanation
The technician is unable to access the company portal website, but other websites work fine. This suggests an issue with resolving the specific URL of the company portal, which is a function of DNS.
Here's why other options are not the most likely cause:
DHCP reservations: This is not relevant as the issue persists even when the technician tries a different workstation, indicating a problem beyond individual device configuration.
Static IP addresses: Similar to DHCP reservations, static IPs are not likely the cause as both affected workstations are experiencing the issue.
Default gateway: While the default gateway is necessary for internet access, other websites are working, making it less likely to be the root cause.
References:
CompTIA A+ Certification Core 1 220-1101 Study Guide, Chapter 4: Networking, Section 4.2 Addressing and Naming