IPv4 Addressing Fundamentals

What is the primary difference between public IP addresses and private IP addresses?

Which class of IPv4 address has the highest number of host bits available?

Who assigns blocks of IP addresses to Internet Service Providers (ISPs)?

What is the primary requirement for an end user to receive an IP address block from ARIN?

Which of the following statements about Class C IP addresses is true?

What is one characteristic of non-routable IP addresses?

What is the purpose of the American Registry for Internet Numbers (ARIN)?

Which of the following types of addresses is not routed on the Internet?

Which is true about the breakdown of bits among classes of IPv4 addresses?

What does a local ISP require to obtain a block of IP addresses from ARIN?

IPv4 Addressing

IPv4 addresses are 32 bits long, divided into four octets (8-bit groups).
Each octet is represented in decimal format from 0 to 255.
IPv4 addresses are categorized into classes (A, B, C, D, E) based on their numerical range.
- Class A ranges from 0.0.0.0 to 126.255.255.255.
- Class B ranges from 128.0.0.0 to 191.255.255.255.
- Class C ranges from 192.0.0.0 to 223.255.255.255.
- Class D ranges from 224.0.0.0 to 239.255.255.255.
- Class E ranges from 240.0.0.0 to 254.255.255.255.
The network and host portions of an IPv4 address are defined by the class. The class determines how many bits are dedicated to the network and how many are dedicated to the host.
- Class A: 8 bits for network, 24 bits for host
- Class B: 16 bits for network, 16 bits for host
- Class C: 24 bits for network, 8 bits for host

Private IP Addresses

Addresses within specific ranges (10.0.0.0 to 10.255.255.255, 172.16.0.0 to 172.31.255.255, 192.168.0.0 to 192.168.255.255) are reserved for private use within internal networks (Intranets).
Private addresses are not routable on the public Internet.
Internet Service Providers (ISPs) typically block private IP addresses.

ARIN (American Registry for Internet Numbers)

ARIN is responsible for assigning IP address space to Internet Service Providers (ISPs) and end-users.
End-users must meet specific criteria to receive IP address blocks from ARIN (must be large).
Typically, smaller users obtain IP addresses from an ISP.
ISPs receive IP addresses blocks from ARIN, and then assign IP addresses to their customers.

Explore the essentials of IPv4 addressing in this quiz. You'll learn about the structure of IPv4 addresses, their class distinctions, and the specific ranges allocated for each class. Test your knowledge on private IP addresses and their significance in networking.