When contiguous 1s are added to the default mask, making the all-1s field in the mask longer, the definition of the network part of an IP address is extended to include subnets.
Adding bits to the network part of an address decreases the number of bits in the host part.
***The number of subnetworks created is calculated by the formula 2s, where s is the number of bits by which the default mask was extended.
NAT or PAT can be used to translate the following:
? One private address to one public address: Used in cases when servers on the internal network with private IP addresses must be visible from the public network. The translation from the server’s private IP address to the public IP address is defined statically.
? Many private addresses to one public address: Used for end systems that require access to the public network but do not have to be visible to the outside world.
? Combination: It is common to see a combination of the previous two techniques deployed throughout networks.
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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