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200-301 · Question #1410
200-301 Question #1410: Real Exam Question with Answer & Explanation
The correct answer is A: Subnet Mask. A PC's inability to connect to the internet, specifically on TCP port 80, can be caused by an incorrect subnet mask which prevents proper communication with the local network and the default gateway.
Submitted by alyssa_d· Mar 5, 2026Network Fundamentals
Question
Refer to the exhibit. A newly configured PC fails to connect to the internet by using TCP port 80 to
Options
- ASubnet Mask
- BDNS Servers
- CDefault Gateway
- DDHCP Servers
Explanation
A PC's inability to connect to the internet, specifically on TCP port 80, can be caused by an incorrect subnet mask which prevents proper communication with the local network and the default gateway.
Common mistakes.
- B. Incorrect DNS servers would prevent name resolution but would still allow direct IP access to internet sites, which does not fully explain a general failure to connect via TCP port 80.
- C. While an incorrect default gateway would prevent all internet access, an incorrect subnet mask is a more fundamental error that can prevent a PC from even attempting to use a correctly configured default gateway.
- D. Issues with DHCP servers would typically result in no IP address configuration or an APIPA address, preventing any network connectivity, which is a broader failure than specifically failing to connect to the internet on TCP port 80.
Concept tested. IP Addressing and Subnet Masking
Topics
#IP Addressing#Subnet Mask#Client Connectivity#Network Troubleshooting
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