Practice Quiz

CompTIA Network+

Category - Management

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You have a device that cannot browse the Internet, but can ping individual IP addresses on the Internet. The other workstations on the network seem to browse the Internet just fine. What is the most likely cause of this problem?
  1. The DHCP server is down
  2. The DNS server is down
  3. The workstation has incorrect DNS settings
  4. The router is blocking port 53 on both UDP and TCP
Explanation
Answer: C - The workstation has the DNS settings configured improperly.

Key Takeaway: DNS lets us translate from human friendly names to the IP addresses computers use. We can tell it is a DNS problem because the traffic still goes out to the Internet by IP address. We know that the server is not down and that the router is not blocking port 53, because the other workstations can get out to the Internet. That leaves us with the fact that the DNS is configured improperly on the individual client.
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