Chapter 6-4 IPv4 Addressing PDF
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This document provides a technical overview of IPv4 addressing, including the different classes, address ranges, and the role of ARIN in IP address allocation. It's a good resource for students or professionals learning about computer networking.
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Chapter 6-4 IPv4 Addressing The IPv4 classes and address range The structure of the 32-bit IPv4 address Decimal 10 10 20 1 Binary 00001010 00001010 00010100 00000001 Fig. 6-12 The structure of the 32-bit IP address. The octets making up the n...
Chapter 6-4 IPv4 Addressing The IPv4 classes and address range The structure of the 32-bit IPv4 address Decimal 10 10 20 1 Binary 00001010 00001010 00010100 00000001 Fig. 6-12 The structure of the 32-bit IP address. The octets making up the network and host portions of the IPv4 address for classes A, B, and C. Table 6-8 The breakdown of the network and host bits by class. Class Network Bits Host Bits A 8 24 B 16 16 C 24 8 Address ranges in class A,B, and C have been set aside for private use. These addresses, called private addresses, are not used for Internet data traffic but are intended to be used specifically on internal networks called Intranets. Functionally, private addresses work the same as public addresses except private addresses are not routed on the Internet. These are called non-routable IP address and are block by the Internet Service Providers. ARIN IP addresses are assigned by ARIN, the American Registry for Internet Numbers. www.arin.net ARIN assigns IP address space to Internet Service Provides (ISP) and end users. ARIN only assigns IP address space to ISPs and end users if they qualify. This requires that the ISP or end user be large enough to merit a block of addresses. In the case where blocks of addresses are allocated by ARIN to the ISPs, the ISPs issue addresses to their customers. For example, a Telco could be the ISP that has a large block of IP addresses and issues an IP address to a user. A local ISP could also be assigned a block of IP addresses from ARIN, but the local ISP must have a large number of users. ARIN ARIN also assigns end users IP addresses. Once again, the end user must qualify to receive a block of addresses from ARIN. This usually means that the end user must be large. For example, many universities and large businesses can receive a block of IP addresses from ARIN. However, most end users will get their IP addresses from an ISP (e.g. Telco) or have IP addresses assigned dynamically when they connect to the ISP. Section 6-4 Key Terms IPv4 Class A, B, C, D, and E Non-routable IP Addresses ARIN
