IPv4 Addressing Basics

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Questions and Answers

What is the primary characteristic of private IP addresses?

They are intended for internal networks. (correct)

They are routable on the Internet.

They are assigned exclusively by ICANN.

They are used for Internet data traffic.

What is the structure of an IPv4 address?

A 24-bit address divided into three parts.

A 32-bit address divided into four octets. (correct)

A 32-bit address divided into eight segments.

A 16-bit address divided into four octets.

Which class of IPv4 addresses has 8 bits for network and 24 bits for host?

Class C

Class D

Class B

Class A (correct)

What happens to private addresses in terms of routing on the Internet?

They are ignored by routers. Signup and view all the answers

Who is responsible for assigning IP addresses in North America?

ARIN Signup and view all the answers

Which of the following best describes the requirements for an end user to receive a block of IP addresses from ARIN?

They must be large enough to merit a block. Signup and view all the answers

Which class of IPv4 addresses is characterized by having 16 bits for network and 16 bits for hosts?

Class B Signup and view all the answers

How do Internet Service Providers (ISPs) obtain their block of IP addresses?

They must apply and qualify through ARIN. Signup and view all the answers

What is the main purpose of private addresses in an internal network?

To handle data traffic within Intranets. Signup and view all the answers

Which of the following correctly describes the function of private IP addresses?

They are designed for internal network use only. Signup and view all the answers

What is the primary differentiator between classes A, B, and C in IPv4 addressing?

The bit allocation for network and host segments. Signup and view all the answers

Which class of IPv4 addresses allows for the largest number of hosts?

Class A addresses with 24 bits for hosts. Signup and view all the answers

How does ARIN typically assign IP addresses to ISPs?

Only if they meet specific qualification criteria. Signup and view all the answers

Which of the following best describes non-routable IP addresses?

They are exclusively for use within private networks. Signup and view all the answers

In the context of IP address classes, what does the 'host bits' represent?

Bits that determine the number of unique devices on the network. Signup and view all the answers

Which statement is true regarding the allocation of blocks of IP addresses to end users by ARIN?

Only large organizations typically qualify for these blocks. Signup and view all the answers

Which of the following classes of IPv4 addresses is primarily used for smaller networks?

Class C Signup and view all the answers

What are the bits reserved for 'network' in Class B addresses?

16 bits Signup and view all the answers

What role does ARIN play in the context of IP addressing?

They allocate IP address space to qualifying organizations. Signup and view all the answers

Study Notes

IPv4 Addressing

IPv4 addresses are 32 bits long
Each address is divided into four octets (groups of 8 bits)
Each octet is represented in decimal form
Example: 10.10.20.1
The binary equivalent is: 00001010.00001010.00010100.00000001
Breakdown of Classes A, B, C, D, and E in Tables
- Class A addresses have a range from 0.0.0.0 to 126.255.255.255
- Class B addresses have a range from 128.0.0.0 to 191.255.255.255
- Class C addresses have a range from 192.0.0.0 to 223.255.255.255
Each class has varying Network and Host Bits
- Class A - 8 Network Bits, 24 Host Bits
- Class B - 16 Network Bits, 16 Host Bits
- Class C - 24 Network Bits, 8 Host Bits
Class D addresses are used for multicast
Class E addresses are unused (reserved)
The number of possible hosts varies by class
- Class A: 16,777,214
- Class B: 65,534
- Class C: 254
Private IP addresses are not routed on the internet. -They are used for internal networks (Intranets)
Private IP ranges:
Class A: 10.0.0.0 to 10.255.255.255
Class B: 172.16.0.0 to 172.31.255.255
Class C: 192.168.0.0 to 192.168.255.255
ARIN (American Registry for Internet Numbers) assigns IP address space to ISPs and end users
End users must meet certain qualifications to receive IP address blocks from ARIN
Larger organizations (universities, businesses) typically receive blocks of addresses from ARIN.
Individual users usually get their IP addresses from an ISP.

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Description

Explore the fundamentals of IPv4 addressing in this quiz. Learn about the structure of IPv4 addresses, including their division into octets and the classifications of different address types. Test your knowledge on the range and use of Class A, B, C, D, and E addresses, as well as private IP addresses.