A service name resolves correctly but connections time out. How would you investigate?
Interactive Practice Mode
Formulate your thoughts or take notes before revealing the model solution.
Saved automatically
Model Answer & Deep-Dive Explanation
Confirm the resolved address and port, then test reachability from the affected client environment. Inspect routing, security groups or firewall rules, service binding, load-balancer health, and whether the server is listening. A successful DNS lookup establishes name resolution, not that a transport connection can be made. Separate connection timeout from TLS handshake timeout and application response timeout using traces and logs. Compare working and failing clients and check IPv4 versus IPv6 behavior. Do not rely on ping alone because ICMP and application traffic may follow different policies.
Related Questions in Computer Networks & OS
Why can adding more threads make a CPU-bound service slower?
Medium level • 5 views
What is a Process vs a Thread, and what are the causes and conditions of a Deadlock?
Intermediate level • 4 views
What is the architectural difference between Docker Containers and Virtual Machines (VMs)?
Beginner level • 4 views
What happens step-by-step during a DNS Lookup when typing a URL into the browser?
Intermediate level • 4 views
How does a TCP connection differ from an application-level session?
Medium level • 4 views