WGU D325 Lesson 4.6.11 Lesson Review
& Module 4 2025/2026 Exam Questions
and Answers | 100% Solved
In a subnet with a /28 mask, why can't you rely solely on the first three
octets to determine if an IP address is within the same subnet? -
🧠ANSWER ✔✔Because the network prefix boundary lies within the last
octet
What is the first step in troubleshooting IP configuration issues if you have
ruled out problems at the Physical and Data Link layers? - 🧠ANSWER
✔✔Use ipconfig or ifconfig to verify the host configuration.
What issue arises when a host has an incorrect subnet mask that is longer
than it should be? - 🧠ANSWER ✔✔The host misroutes its replies, thinking
communicating hosts are on a different subnet.
, How can you identify machines with duplicate IP addresses? - 🧠ANSWER
✔✔Using ping and then arp -a to examine the ARP cache table
What is a likely cause of duplicate MAC addresses on a network? -
🧠ANSWER ✔✔Use of locally administered addressing
You are monitoring network traffic and notice that ARP requests for a
specific IP address are receiving responses from two different MAC
addresses.
What is the MOST likely cause of this issue, and how should you proceed
to troubleshoot it? - 🧠ANSWER ✔✔The IP address is configured on a
virtual machine and its host; reassign the IP address to only one device.
What should you suspect if you cannot ping a local host and the error is
"destination unreachable"? - 🧠ANSWER ✔✔Incorrect IP address or
netmask in the IP configuration
What is the first step in the general ping sequence for identifying
connectivity issues? - 🧠ANSWER ✔✔Ping the loopback address.
Why might pinging remote hosts fail even if the network configuration is
correct? - 🧠ANSWER ✔✔ICMP is blocked by a firewall or other security
software.
& Module 4 2025/2026 Exam Questions
and Answers | 100% Solved
In a subnet with a /28 mask, why can't you rely solely on the first three
octets to determine if an IP address is within the same subnet? -
🧠ANSWER ✔✔Because the network prefix boundary lies within the last
octet
What is the first step in troubleshooting IP configuration issues if you have
ruled out problems at the Physical and Data Link layers? - 🧠ANSWER
✔✔Use ipconfig or ifconfig to verify the host configuration.
What issue arises when a host has an incorrect subnet mask that is longer
than it should be? - 🧠ANSWER ✔✔The host misroutes its replies, thinking
communicating hosts are on a different subnet.
, How can you identify machines with duplicate IP addresses? - 🧠ANSWER
✔✔Using ping and then arp -a to examine the ARP cache table
What is a likely cause of duplicate MAC addresses on a network? -
🧠ANSWER ✔✔Use of locally administered addressing
You are monitoring network traffic and notice that ARP requests for a
specific IP address are receiving responses from two different MAC
addresses.
What is the MOST likely cause of this issue, and how should you proceed
to troubleshoot it? - 🧠ANSWER ✔✔The IP address is configured on a
virtual machine and its host; reassign the IP address to only one device.
What should you suspect if you cannot ping a local host and the error is
"destination unreachable"? - 🧠ANSWER ✔✔Incorrect IP address or
netmask in the IP configuration
What is the first step in the general ping sequence for identifying
connectivity issues? - 🧠ANSWER ✔✔Ping the loopback address.
Why might pinging remote hosts fail even if the network configuration is
correct? - 🧠ANSWER ✔✔ICMP is blocked by a firewall or other security
software.
