To accommodate large and small networks, the 32-bit IP addresses are segregated into Classes A through E.
The first few bits of the first octet determine the class of an address; this then determines how many network bits and host bits are in the address.
Each address class allows for a certain number of network addresses and a certain number of host addresses within a network.
Using classes to denote which portion of the address represents the network number and which portion represents the node or host address is called classful addressing
IP address space is divided into public and private spaces.
Private addresses are reserved IP addresses that are to be used only internally within a company’s network, not on the Internet. Private addresses must therefore be mapped to a company’s
external registered address when sending anything on the Internet.
Public IP addresses are provided for external communication.
RFC 1918, Address Allocation for Private Internets, defines the private IP addresses as follows:
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
The remaining addresses are public addresses..
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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