Basic Networking

Here are some fundamental networking questions Basic Networking that are commonly asked in interviews or exams to test basic understanding:

Basic Networking Concepts:
1. What is a computer network?
2. What are the different types of networks? (LAN, WAN, MAN, PAN)
3. What is the difference between the Internet and an Intranet?
4. What is an IP address?
5. What is the difference between IPv4 and IPv6?

OSI & TCP/IP Models:
6. What is the OSI model? Name its 7 layers.
7. How is the TCP/IP model different from the OSI model?
8. Which layer is responsible for routing?
9. What protocols work at the Transport layer?

IP Addressing and Subnetting:
10. What is subnetting and why is it used?
11. What is a private IP address? Give examples.
12. What is the default subnet mask for a Class C IP?
13. What is CIDR notation?

Routing & Switching:
14. What is the difference between a router and a switch?
15. What is a default gateway?
16. What is static vs dynamic routing?
17. What are routing protocols? Name a few. (RIP, OSPF, BGP)

Common Protocols and Ports:
18. What does DNS do?
19. What is DHCP and how does it work?
20. What is the purpose of HTTP/HTTPS?
21. What are some common TCP/UDP port numbers? (e.g., 80, 443, 53, 22)

Network Security:
22. What is a firewall?
23. What is NAT (Network Address Translation)?
24. What is a VPN?
25. What are the differences between symmetric and asymmetric encryption?

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