CompTIA A+ Core 1 (220-1201)Hardware and Network TroubleshootingMedium
A technician is troubleshooting a network printer that is accessible from some workstations but not others. The technician has confirmed that all workstations are on the same subnet and can ping the printer's IP address. Which of the following is the MOST likely cause of this issue?
- AFirewall blocking print services on affected workstations
- BThe printer has run out of toner or ink
- CIP address conflict on the network
- DIncorrect print driver installed on the affected workstations
Show answer & explanationAnswer & explanation
Correct answer: A. Firewall blocking print services on affected workstations
If some workstations can access the printer and others cannot, despite being on the same subnet and able to ping, it suggests a local issue on the affected workstations. A firewall blocking the necessary print ports (e.g., TCP 9100, UDP 161/162) is a common cause.
Why the other options are wrong
- B. Running out of toner/ink would prevent printing for all users, but wouldn't stop workstations from accessing the printer's network interface.
- C. An IP address conflict would cause general network connectivity issues for the conflicting devices, not selective printer access.
- D. An incorrect print driver would cause print jobs to fail or print incorrectly, but the workstations would still be able to 'see' and connect to the printer.
Network Printer Access Issues
When some devices can access a network printer and others cannot, despite basic network connectivity, local firewall rules or incorrect printer configuration on the affected devices are common culprits.
- Ping success indicates basic network connectivity
- Partial access points to local client-side issues
- Firewalls often block specific service ports
Memory trick: Firewalls Fight to Isolate Resources.