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IP Address Basics (IPv4 & IPv6)

Introduction

AnIP address network से जुड़े devices को दिया गया एक unique identifier होता है। IPv4 और IPv6 पर questions banking, SSC, और technical awareness exams में बहुत common होते हैं क्योंकि ये basic networking knowledge और factual clarity को test करते हैं।

Pattern: IP Address Basics (IPv4 & IPv6)

Pattern

IP address network पर किसी device को uniquely identify करता है, और यह mainly दो versions में पाया जाता है: IPv4 और IPv6, जो length, format, और capacity में एक-दूसरे से अलग होते हैं।

Step-by-Step Example

Question

निम्न में से कौन सा IPv4 address को सही रूप से describe करता है?

Options:
A. 32-bit numeric address
B. 64-bit hexadecimal address
C. 128-bit numeric address
D. Alphabet-only address

Solution

  1. Step 1: IPv4 की characteristics याद करें

    IPv4 IP addressing का पहला widely used version था।

  2. Step 2: Bit length और format को match करें

    IPv4 एक 32-bit numeric address का use करता है जो dotted decimal format में लिखा जाता है।

  3. Final Answer:

    32-bit numeric address → Option A

  4. Quick Check:

    Example 192.168.1.1 IPv4 format को confirm करता है ✅

Quick Variations

• Dots से separated चार numbers में लिखा address → IPv4

• Colons के साथ hexadecimal में लिखा address → IPv6

• IP address shortage को solve करने के लिए introduce किया गया → IPv6

Trick to Always Use

  • Step 1 → Dots और numbers → IPv4
  • Step 2 → Colons और hexadecimal → IPv6
  • Step 3 → Larger address space → IPv6

Summary

Summary

  • IP address network पर device को uniquely identify करता है।
  • IPv4 32-bit addressing system का use करता है।
  • IPv6 128-bit addressing system का use करता है।
  • IPv6 को IPv4 address exhaustion को overcome करने के लिए introduce किया गया।

याद रखने का example:
192.168.1.1 → IPv4, 2001:db8::1 → IPv6

Practice

(1/5)
1. Which IP version uses dotted decimal notation such as 10.0.0.1?
easy
A. IPv4
B. IPv6
C. Both IPv4 and IPv6
D. Neither IPv4 nor IPv6

Solution

  1. Step 1: Identify the notation style

    Dotted decimal notation uses numbers separated by dots.

  2. Step 2: Match with IP version

    IPv4 addresses are written in dotted decimal format.

  3. Final Answer:

    IPv4 → Option A

  4. Quick Check:

    10.0.0.1 is a standard IPv4 address ✅
Hint: Dots with numbers always indicate IPv4.
Common Mistakes: Assuming IPv6 also uses dots.
2. Which IP version was introduced mainly to overcome the shortage of available IP addresses?
easy
A. IPv6
B. IPv4
C. ARP
D. MAC addressing

Solution

  1. Step 1: Identify the problem

    The question refers to exhaustion of IP addresses.

  2. Step 2: Match with the solution

    IPv6 was introduced to provide a much larger address space.

  3. Final Answer:

    IPv6 → Option A

  4. Quick Check:

    128-bit addressing solves IPv4 shortage ✅
Hint: Address shortage problem = IPv6.
Common Mistakes: Thinking IPv4 was upgraded to solve the issue.
3. Which of the following formats represents an IPv6 address?
easy
A. 172.16.0.1
B. 2001:0db8:85a3::8a2e:0370:7334
C. 255.255.255.0
D. 192.168.10.5

Solution

  1. Step 1: Observe the address format

    The address uses hexadecimal values separated by colons.

  2. Step 2: Match with IP version

    IPv6 addresses are written in hexadecimal with colon separators.

  3. Final Answer:

    2001:0db8:85a3::8a2e:0370:7334 → Option B

  4. Quick Check:

    Colon-separated hexadecimal confirms IPv6 ✅
Hint: Colons + hex digits = IPv6.
Common Mistakes: Mistaking subnet masks for IPv6.
4. How many bits are used in an IPv6 address?
medium
A. 32 bits
B. 64 bits
C. 128 bits
D. 256 bits

Solution

  1. Step 1: Recall IPv6 specification

    IPv6 was designed with a much larger address size.

  2. Step 2: Identify correct bit length

    IPv6 uses a 128-bit addressing system.

  3. Final Answer:

    128 bits → Option C

  4. Quick Check:

    Large address space confirms 128-bit IPv6 ✅
Hint: IPv6 always means 128 bits.
Common Mistakes: Confusing IPv6 with 64-bit architecture.
5. Which IP version supports a much larger number of devices due to its address capacity?
medium
A. IPv4 only
B. Both IPv4 and IPv6 equally
C. IPv4 with subnetting
D. IPv6

Solution

  1. Step 1: Compare address capacities

    The question focuses on the number of supported devices.

  2. Step 2: Match with IP version

    IPv6 provides an extremely large address pool.

  3. Final Answer:

    IPv6 → Option D

  4. Quick Check:

    128-bit addressing supports massive device growth ✅
Hint: More devices needed = IPv6.
Common Mistakes: Assuming subnetting fully solves IPv4 limits.

Mock Test

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