nerdexam
ExamsN10-005Questions#928
CompTIA

N10-005 · Question #928

N10-005 Question #928: Real Exam Question with Answer & Explanation

The correct answer is D: Subnet mask. The subnet mask 255.255.252.0 (/22) encompasses the range 10.0.0.0 – 10.0.3.255, meaning the host at 10.0.1.x believes 10.0.2.25 is on its own local network. Instead of routing traffic through the default gateway (10.0.1.1), it attempts to reach 10.0.2.25 directly via ARP. If the

Question

Users in several departments are reporting connectivity problems. The technician examines the computer and finds the following settings. The IP address is 10.0.1.0 with a subnet mask of 255.255.252.0. The default gateway is 10.0.1.1 and the DNS server is 10.0.0.15. A user can connect to the internet but not servers on other internal subnets. The technician is not able to connect with a server with an IP of 10.0.2.25. Which of the following is MOST likely the problem?

Options

  • ADefault gateway
  • BDuplicate IP address
  • CWrong DNS
  • DSubnet mask

Explanation

The subnet mask 255.255.252.0 (/22) encompasses the range 10.0.0.0 – 10.0.3.255, meaning the host at 10.0.1.x believes 10.0.2.25 is on its own local network. Instead of routing traffic through the default gateway (10.0.1.1), it attempts to reach 10.0.2.25 directly via ARP. If the actual network design uses /24 subnets (255.255.255.0), no device on 10.0.2.0/24 will respond to that ARP because they are on a different physical segment. The gateway and DNS are plausible values; the subnet mask is the misconfiguration that causes the host to bypass routing for addresses it incorrectly believes are local.

Community Discussion

No community discussion yet for this question.

Sign up to join the discussion
Full N10-005 Practice