220-1102 · Question #346
A user is unable to access a web-based application. A technician verifies the computer cannot access any web pages at all. The computer obtains an IP address from the DHCP server. Then, the…
The correct answer is A. A firewall is blocking the application. If a user can ping internet IP addresses but cannot access any web pages or applications, the most likely issue is a firewall blocking web traffic.
Question
A user is unable to access a web-based application. A technician verifies the computer cannot access any web pages at all. The computer obtains an IP address from the DHCP server. Then, the technician verifies the user can ping localhost, the gateway, and known IP addresses on the internet and receive a response. Which of the following is the MOST likely reason for the issue?
Options
- AA firewall is blocking the application.
- BThe wrong VLAN was assigned.
- CThe incorrect DNS address was assigned.
- DThe browser cache needs to be cleared.
How the community answered
(41 responses)- A80% (33)
- B12% (5)
- C2% (1)
- D5% (2)
Why each option
If a user can ping internet IP addresses but cannot access any web pages or applications, the most likely issue is a firewall blocking web traffic.
If a computer can ping IP addresses on the internet but cannot access any web pages or web-based applications, it strongly suggests that a firewall (either software or network-based) is blocking HTTP/S traffic (ports 80 and 443), preventing web content from loading.
If the wrong VLAN was assigned, the user would likely not be able to ping the gateway or internet IP addresses successfully.
If the incorrect DNS address was assigned, the user would typically be unable to ping domain names on the internet, but would still be able to ping IP addresses, which contradicts the given information that pings to known internet IP addresses work.
Clearing the browser cache might resolve issues with a specific web page or application, but it would not cause an inability to access any web pages or web-based applications, especially if it's a network-wide issue.
Concept tested: Network troubleshooting - internet access
Source: https://learn.microsoft.com/en-us/windows/security/threat-protection/windows-defender-firewall/windows-defender-firewall-with-advanced-security-overview
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