Cisco's Cisco CCIE Fundamentals Network Design and Case Studies PDF

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By Cisco

ISBN-10: 1578701678

ISBN-13: 9781578701674

This book presents internetworking layout and implementation details and is helping you establish and enforce sensible internetworking concepts which are either versatile and scalable. This booklet used to be constructed to aid execs getting ready for Cisco qualified Internetwork specialist (CCIE) candidacy, even though it's a invaluable source for all internetworking execs. it truly is designed to be used together with different Cisco manuals or as a standalone reference. you'll locate it important to consult the Cisco CCIE basics: Case experiences, which gives case reports and examples of the community layout thoughts defined during this publication.

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Sample text

As shown in Figure 2-21, redundancy can be employed to help minimize media failures. Each station in this figure is attached to two different media segments. NICs, hub ports, and interface cables are all redundant. This approach doubles the cost of network connectivity for each end station as well as the port usage on all internetworking devices, and is therefore only recommended in situations where complete redundancy is required. It also assumes that end station software, including both the network and the application subsystems, can handle and effectively use the redundant components.

IPSO support on routers addresses both the basic and extended security options described in a draft of the IPSO circulated by the Defense Communications Agency. This draft document is an early version of Request for Comments (RFC) 1108. IPSO defines security levels (for example, TOP SECRET, SECRET, and others) on a per-interface basis and accepts or rejects messages based on whether they include adequate authorization. Some security systems are designed to keep remote users from accessing the network unless they have adequate authorization.

To minimize already excessive internal traffic, another department might want to exclude all backbone traffic except electronic mail and one key custom application from entering its network segment. These examples reflect policies specific to a single department. However, policies can reflect overall organizational goals. For example, an organization might want to regulate backbone traffic to a maximum of 10 percent average bandwidth during the work day and 1-minute peaks of 30 percent utilization.

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Cisco CCIE Fundamentals Network Design and Case Studies by Cisco

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