What are private IP addresses and common port numbers?
This networking question tests fundamental knowledge of IP addressing schemes and standard service ports essential for system administration and troubleshooting.
Why Interviewers Ask This
Basic networking knowledge is crucial for support roles to diagnose connectivity issues. It verifies familiarity with internet protocols and standard configurations used in enterprise environments.
How to Answer This Question
Define private IP ranges (e.g., 192.168.x.x, 10.x.x.x). List common ports like 80 (HTTP), 443 (HTTPS), 22 (SSH), 21 (FTP). Explain their purposes briefly.
Key Points to Cover
- Private IP ranges definition
- Common service ports
- Purpose of each port
- Internal vs Public distinction
Sample Answer
Private IP addresses are reserved for internal networks and are not routable on the public internet. Common ranges include 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. Regarding ports, Port 80 is used for HTTP traffic,…
Common Mistakes to Avoid
- Confusing private with public IPs
- Listing obscure ports instead of common ones
- Failing to explain the purpose
Sound confident on this question in 5 minutes
Answer once and get a 30-second AI critique of your structure, content, and delivery. First attempt is free — no signup needed.