5.3. Run Basic Diagnostic Commands and Interpret the Results. 100-150 Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   A user can access a website by IP address (203.0.113.10) but cannot access it by its hostname (www.example.com). You run `nslookup www.example.com` and receive the response: 'Server: dns.company.local, Address: 10.0.0.1, *** dns.company.local can't find www.example.com: Non-existent domain'. What is the MOST likely cause?

   • AThe DNS server at 10.0.0.1 cannot resolve the hostname.
   • BThe website's web server is down.
   • CThe user's workstation has a misconfigured subnet mask.
   • DThe user's workstation has a firewall blocking DNS queries.
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   In the output of a ping command, what does the 'TTL' value primarily indicate?

   • AThe number of hops the packet can still traverse before being discarded
   • BThe priority level of the ICMP packet in the network
   • CThe time in milliseconds for the packet to reach the destination
   • DThe total number of bytes in the ICMP packet
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   A ping test to a host shows 0% packet loss but an average round-trip time of 250 ms. What does this result indicate?

   • AThe host is unreachable
   • BThe DNS resolution is slow
   • CThe network path has high latency
   • DThe host's IP address is invalid
   Reveal Solution Discussion Select an answer first
5. 9expert · hard

   A technician is troubleshooting a Windows workstation that cannot connect to the network. They run `ipconfig /all` and see: IPv4 Address: 192.168.1.100, Subnet Mask: 255.255.255.0, Default Gateway: 192.168.1.1, DHCP Enabled: No. The workstation cannot ping the default gateway. What is the MOST likely cause?

   • AThe workstation's default gateway is misconfigured.
   • BThe workstation's subnet mask is incorrect.
   • CThe workstation's IP address is a duplicate of another device.
   • DThe workstation's network cable is faulty or unplugged.
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is the primary purpose of the tracert (Windows) or traceroute (Linux/macOS) command?

   • ATo resolve a hostname to an IP address using DNS
   • BTo test the reachability of a host by sending ICMP echo requests
   • CTo display the IP configuration of the local machine
   • DTo trace the path packets take to a destination and list each router hop
   Reveal Solution Discussion Select an answer first