Classful IP addressing

In this chapter, you will learn: Understand IPv4 addresses and classes, identify the class of an IP address, find the network address given an IP address, understand masks and how to use them, understand subnets and supernets.

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This chapter compare and contrast classful and classless IP addressing, review VLSM and explain the benefits of classless IP addressing, describe the role of the Classless Inter-Domain Routing (CIDR) standard in making efficient use of scarce IPv4 addresses.

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Chapter 6 introduce VLSM and CIDR. This chapter compare and contrast classful and classless IP addressing, review VLSM and explain the benefits of classless IP addressing, describe the role of the Classless Inter-Domain Routing (CIDR) standard in making efficient use of scarce IPv4 addresses.

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When you’re subnetting an IP address for a network you have two options: classful and classless. Classful subnetting is the simplest method. It tends to be the most wasteful because it uses more addresses than are necessary. In classful subnetting you use the same subnet mask for each subnet, and all the subnets have the same number of addresses in them. Classless addressing allows you to use different subnet masks and create subnets tailored to the number of users in each group. This technique is referred to as VLSM....

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By looking at the addressing structures, you can see that even with a Class C address, there are a large number of hosts per network. Such a structure is an inefficient use of addresses if each end of a routed link requires a different network number. It is unlikely that the smaller office LANs would have that many devices. You can resolve this problem by using a technique known as subnet addressing.

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Co pa e and contrast classful and classless Compare a d co as c ass u a d c ass ess IP addressing. Review VLSM and explain the benefits of classless IP addressing. Describe the role of the Classless Inter-Domain Inter Domain Routing (CIDR) standard in making efficient use of scarce IPv4 addresses In addition to subnetting, it became possible to summarize a large collection of classful networks into an aggregate route, or supernet.

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VLSM and CIDR. Objectives: Compare and contrast classful and classless IP addressing. Review VLSM and explain the benefits of classless IP addressing. Describe the role of the Classless Inter-Domain Inter Domain Routing (CIDR) standard in making efficient use of scarce IPv4 addresses In addition to subnetting, it became possible to summarize a large collection of classful networks into an aggregate route, or supernet.

42p thanhtung_hk 05-11-2010 126 34   Download

Subnet Masks Khi ta chia một Network ra thành nhiều Network nhỏ hơn, các Network nhỏ nầy được gọI là Subnet. Theo quy ước, các địa chỉ IP được chia ra làm ba Class (lớp) như sau: Address Class Class A Class B Class C Subnet mask trong dạng nhị phân 11111111 00000000 00000000 00000000 11111111 11111111 00000000 00000000 11111111 11111111 11111111 00000000 Subnet mask 255.0.0.0 255.255.0.0 255.255.255.0 Subnet Mask của Class A bằng 255.0.0.0 có nghĩa rằng ta dùng 8 bits, tính từ trái qua phải (các bits được set thành 1), của địa chỉ IP để phân biệt các NetworkID...

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Trong phần này chúng ta sẽ tìm hiểu về TCP/IPv4. IPv4 có 32bit chia thành 4 Octet ( mỗi Octet có 8bit, tương đương 1 byte ) cách đếm đều từ trái qua phải bít 1 cho đến bít 32, các Octet tách biệt nhau bằng dấu chấm (.), bao gồm có 3 thành phần chính. - Class Bit: Bit nhận dạng lớp dùng để phân biệt địa chỉ IP thuộc lớp nào. - Network ID: Địa chỉ của mạng - Host ID: Địa chỉ của máy Như vậy với một số IP được viết dưới dạng nhị phân ví dụ...

3p bantoisg 09-12-2009 165 41   Download