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
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