Test on IT Troubleshooting and Technical Documentation

Question 1: When applying a fix during troubleshooting, it is generally recommended to change multiple settings simultaneously to speed up the process.

A. Ano

B. Ne

Explanation: The study materials state that 'Changing multiple things at once' is a common mistake because 'If the problem disappears, you do not know what fixed it' and you may have introduced new problems. It explicitly advises to 'Change only one thing at a time'.

Question 2: According to the study materials, when a 'ping' command fails, which two distinct reasons are given for this failure?

A. The host is temporarily busy and cannot respond.

B. The host is physically down or unreachable.

C. A firewall is actively blocking ICMP traffic to the host.

D. The network cable is unplugged.

Explanation: The study materials explicitly state: 'ping can fail for two completely different reasons: the host is down, or a firewall blocks ICMP.' Option 1 and 3 are not mentioned as distinct reasons for ping failure in the provided text.

Question 3: A firewall blocking ICMP is explicitly identified in the study materials as a cause of packet loss above 1% during a ping test.

A. Ano

B. Ne

Explanation: The study materials state that 'Loss above 1% suggests congestion or a broken link'. While a firewall blocking ICMP can cause a 'Request timeout', it is not explicitly listed as a direct cause of 'packet loss above 1%' in the provided text.

Question 4: Based on the `ipconfig /all` output provided in the study materials, which of the following statements about your computer's network configuration or potential issues are correct?

A. If the IPv4 Address is 169.254.x.x, it means DHCP failed and the computer has no internet access.

B. The Default Gateway shows the router that forwards traffic outside your local network, and if it's empty or incorrect, no traffic leaves your LAN.

C. The DNS Servers listed indicate the servers your computer uses for name resolution queries.

D. The 'Lease Expires' field indicates the maximum number of hops a packet can take before being discarded.

Explanation: The study materials state that if the IPv4 Address shows 169.254.x.x, DHCP failed and no internet access is possible. It also explains that the Default Gateway shows the router that forwards traffic outside your local network, and if it's empty or wrong, no traffic leaves your LAN. Furthermore, the DNS Servers field indicates which DNS server your computer sends name resolution queries to. The 'Lease Expires' field, however, indicates when DHCP will issue a new address assignment, not the number of hops a packet can take (which is related to TTL in ping/traceroute).

Question 5: When monitoring the Windows Task Manager Performance tab, a sustained RAM usage of 90% or more indicates the system is likely using virtual memory, which dramatically slows down performance.

A. Ano

B. Ne

Explanation: The study materials state that 'RAM 90%+ — The system is likely using "virtual memory" (the disk as RAM), which is dramatically slower.' This clearly supports that high RAM usage on the Performance tab suggests virtual memory usage and slower performance.