Top Interview Questions & Answers for DevOps, CCNA, CCNP, Linux & Firewall in 2025
Are you preparing for your next IT interview? Whether you're aiming for a DevOps engineer, networking professional, or firewall security expert role, it’s crucial to be ready with the right answers. At UniNets, we’ve compiled the latest and most frequently asked interview questions along with sample answers to help you succeed. ✅ DevOps Interview Questions & Answers What is CI/CD in DevOps? Answer: CI/CD stands for Continuous Integration and Continuous Deployment/Delivery. It automates code integration, testing, and deployment to ensure faster and reliable software releases. Explain the difference between Ansible, Puppet, and Chef. Answer: All three are configuration management tools. Ansible is agentless and uses YAML; Puppet uses its own language and requires an agent; Chef uses Ruby-based DSL and a master-agent setup. What’s a container in DevOps? Answer: A container is a lightweight, standalone, executable package that includes everything needed to run an application, including code, runtime, and dependencies (e.g., Docker containers). Check out DevOps Interview Questions with answers ✅ CCNA Interview Questions & Answers What is the difference between a hub, switch, and router? Answer: A hub broadcasts data to all devices; a switch forwards data to specific devices based on MAC addresses; a router directs data between networks using IP addresses. Explain VLAN. Answer: VLAN (Virtual Local Area Network) logically segments a network into different broadcast domains to improve security and reduce traffic. CCNA Interview Questions with Answers ✅ CCNP Interview Questions & Answers What is OSPF and how does it work? Answer: OSPF (Open Shortest Path First) is a link-state routing protocol that uses Dijkstra’s algorithm to find the shortest path in an IP network. Explain BGP attributes. Answer: Key BGP attributes include AS_PATH, NEXT_HOP, LOCAL_PREF, and MED, used to select optimal routes between autonomous systems. CCNP Interview Questions with Answers ✅ Linux Interview Questions & Answers What is the difference between Hard Link and Soft Link? Answer: Hard link points directly to the inode of a file; soft link (symbolic link) points to the filename. Hard links can’t span across different file systems. How do you check disk usage in Linux? Answer: Use the df -h command to display disk usage in a human-readable format. Linux interview questions with answers ✅ Firewall Interview Questions & Answers What is the difference between Stateful and Stateless Firewalls? Answer: Stateful firewalls track the state of active connections; stateless firewalls filter packets based on static rules without tracking state. Explain NAT in firewall configuration. Answer: NAT (Network Address Translation) maps private IP addresses to public IP addresses, allowing secure communication between internal and external networks. Firewall Interview questions with answers At UniNets, we provide real-time training, certification preparation, and practical lab experience for all these technologies. Stay tuned for more detailed interview guides and tutorials to help you ace your next job interview.
Are you preparing for your next IT interview? Whether you're aiming for a DevOps engineer, networking professional, or firewall security expert role, it’s crucial to be ready with the right answers. At UniNets, we’ve compiled the latest and most frequently asked interview questions along with sample answers to help you succeed.
✅ DevOps Interview Questions & Answers
What is CI/CD in DevOps?
Answer: CI/CD stands for Continuous Integration and Continuous Deployment/Delivery. It automates code integration, testing, and deployment to ensure faster and reliable software releases.
Explain the difference between Ansible, Puppet, and Chef.
Answer: All three are configuration management tools. Ansible is agentless and uses YAML; Puppet uses its own language and requires an agent; Chef uses Ruby-based DSL and a master-agent setup.
What’s a container in DevOps?
Answer: A container is a lightweight, standalone, executable package that includes everything needed to run an application, including code, runtime, and dependencies (e.g., Docker containers).
Check out DevOps Interview Questions with answers
✅ CCNA Interview Questions & Answers
What is the difference between a hub, switch, and router?
Answer: A hub broadcasts data to all devices; a switch forwards data to specific devices based on MAC addresses; a router directs data between networks using IP addresses.
Explain VLAN.
Answer: VLAN (Virtual Local Area Network) logically segments a network into different broadcast domains to improve security and reduce traffic.
CCNA Interview Questions with Answers
✅ CCNP Interview Questions & Answers
What is OSPF and how does it work?
Answer: OSPF (Open Shortest Path First) is a link-state routing protocol that uses Dijkstra’s algorithm to find the shortest path in an IP network.
Explain BGP attributes.
Answer: Key BGP attributes include AS_PATH, NEXT_HOP, LOCAL_PREF, and MED, used to select optimal routes between autonomous systems.
CCNP Interview Questions with Answers
✅ Linux Interview Questions & Answers
What is the difference between Hard Link and Soft Link?
Answer: Hard link points directly to the inode of a file; soft link (symbolic link) points to the filename. Hard links can’t span across different file systems.
How do you check disk usage in Linux?
Answer: Use the df -h command to display disk usage in a human-readable format.
Linux interview questions with answers
✅ Firewall Interview Questions & Answers
What is the difference between Stateful and Stateless Firewalls?
Answer: Stateful firewalls track the state of active connections; stateless firewalls filter packets based on static rules without tracking state.
Explain NAT in firewall configuration.
Answer: NAT (Network Address Translation) maps private IP addresses to public IP addresses, allowing secure communication between internal and external networks.
Firewall Interview questions with answers
At UniNets, we provide real-time training, certification preparation, and practical lab experience for all these technologies. Stay tuned for more detailed interview guides and tutorials to help you ace your next job interview.
