IT | IP Addressing (IPv4 & IPv6) 🚀
IP Addressing (IPv4 & IPv6) – 50 One-Liner Q&A
Basics of IP Addressing
Q.1. What does IP stand for?
Ans. Internet Protocol.
Q.2. What is an IP address?
Ans. A unique numerical identifier assigned to each device on a network.
Q.3. How many bits are there in IPv4 address?
Ans. 32 bits.
Q.4. How many bits are there in IPv6 address?
Ans. 128 bits.
Q.5. How many bytes are in an IPv4 address?
Ans. 4 Bytes.
IPv4 Addressing
Q.6. How is an IPv4 address written?
Ans. In dotted decimal notation (e.g., 192.168.1.1).
Q.7. How many classes are in IPv4 addressing?
Ans. Five classes (A, B, C, D, E).
Q.8. What is the range of Class A addresses?
Ans. 1.0.0.0 to 126.0.0.0.
Q.9. What is the range of Class B addresses?
Ans. 128.0.0.0 to 191.255.0.0.
Q.10. What is the range of Class C addresses?
Ans. 192.0.0.0 to 223.255.255.0.
Q.11. What is the range of Class D addresses?
Ans. 224.0.0.0 to 239.255.255.255 (Multicast).
Q.12. What is the range of Class E addresses?
Ans. 240.0.0.0 to 255.255.255.255 (Experimental).
Q.13. What is the loopback IP address?
Ans. 127.0.0.1.
Q.14. What is the default subnet mask of Class A?
Ans. 255.0.0.0.
Q.15. What is the default subnet mask of Class B?
Ans. 255.255.0.0.
Q.16. What is the default subnet mask of Class C?
Ans. 255.255.255.0.
Q.17. What is private IP range of Class A?
Ans. 10.0.0.0 – 10.255.255.255.
Q.18. What is private IP range of Class B?
Ans. 172.16.0.0 – 172.31.255.255.
Q.19. What is private IP range of Class C?
Ans. 192.168.0.0 – 192.168.255.255.
Q.20. What is APIPA address range?
Ans. 169.254.0.0 – 169.254.255.255.
IPv6 Addressing
Q.21. How is an IPv6 address written?
Ans. In hexadecimal, separated by colons (e.g., 2001:0db8::1).
Q.22. How many groups are in IPv6 address?
Ans. 8 groups of 16 bits each.
Q.23. What is the loopback address in IPv6?
Ans. ::1.
Q.24. What is the unspecified IPv6 address?
Ans. :: (all zeros).
Q.25. What is the IPv6 equivalent of IPv4 private address?
Ans. Unique Local Address (fc00::/7).
Q.26. What is IPv6 link-local address range?
Ans. fe80::/10.
Q.27. What is IPv6 multicast range?
Ans. ff00::/8.
Q.28. What is IPv6 global unicast range?
Ans. 2000::/3.
Q.29. What is IPv6 anycast address?
Ans. An address assigned to multiple interfaces for nearest delivery.
Q.30. Does IPv6 use broadcast addresses?
Ans. No, IPv6 replaces broadcast with multicast.
Comparison: IPv4 vs IPv6
Q.31. Number of addresses in IPv4?
Ans. About 4.3 billion (2³²).
Q.32. Number of addresses in IPv6?
Ans. About 340 undecillion (2¹²⁸).
Q.33. Address length of IPv4?
Ans. 32-bit.
Q.34. Address length of IPv6?
Ans. 128-bit.
Q.35. IPv4 uses which configuration method?
Ans. Manual (static) and DHCP.
Q.36. IPv6 uses which configuration method?
Ans. Auto-configuration + DHCPv6.
Q.37. Which protocol does IPv4 use for ARP?
Ans. Address Resolution Protocol (ARP).
Q.38. Which protocol does IPv6 use instead of ARP?
Ans. Neighbor Discovery Protocol (NDP).
Q.39. Does IPv4 support IPsec by default?
Ans. No, it is optional.
Q.40. Does IPv6 support IPsec by default?
Ans. Yes, mandatory.
Miscellaneous
Q.41. What is subnetting?
Ans. Dividing an IP network into smaller sub-networks.
Q.42. What is CIDR in IP addressing?
Ans. Classless Inter-Domain Routing (e.g., /24).
Q.43. What is NAT?
Ans. Network Address Translation (converts private to public IPs).
Q.44. Which IP version eliminates NAT?
Ans. IPv6.
Q.45. What is dual stack in networking?
Ans. Running IPv4 and IPv6 together.
Q.46. What is tunneling in IPv6?
Ans. Encapsulating IPv6 packets inside IPv4.
Q.47. What is Teredo in IPv6?
Ans. A tunneling protocol for IPv6 over IPv4.
Q.48. What is DHCPv6?
Ans. DHCP protocol designed for IPv6 networks.
Q.49. What is SLAAC in IPv6?
Ans. Stateless Address Auto Configuration.
Q.50. Which version of IP is currently dominant on the Internet?
Ans. IPv4 (but IPv6 adoption is growing).
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