Christina Hattingh's Books

SIP Trunking

By: Christina Hattingh,Darryl Sladden,ATM Zakaria Swapan

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SIP Trunking

By: Christina Hattingh,Darryl Sladden,ATM Zakaria Swapan

The first complete guide to planning, evaluating, and implementing high-value SIP trunking solutions Most large enterprises have switched to IP telephony, and service provider backbone networks have largely converted to VoIP transport. But there’s a key missing link: most businesses still connect to their service providers via old-fashioned, inflexible TDM trunks. Now, three Cisco® experts show how to use Session Initiation Protocol (SIP) trunking to eliminate legacy interconnects and gain the full benefits of end-to-end VoIP. Written for enterprise decision-makers, network architects, consultants, and service providers, this book demystifies SIP trunking technology and trends and brings unprecedented clarity to the transition from TDM to SIP interconnects. The authors separate the true benefits of SIP trunking from the myths and help you systematically evaluate and compare service provider offerings. You will find detailed cost analyses, including guidance on identifying realistic, achievable savings. SIP Trunking also introduces essential techniques for optimizing network design and security, introduces proven best practices for implementation, and shows how to apply them through a start-to-finish case study. Discover the advanced Unified Communications solutions that SIP trunking facilitates Systematically plan and prepare your network for SIP trunking Generate effective RFPs for SIP trunking Ask service providers the right questions—and make sense of their answers Compare SIP deployment models and assess their tradeoffs Address key network design issues, including security, call admission control, and call flows Manage SIP/TDM interworking throughout the transition This IP communications book is part of the Cisco Press® Networking Technology Series. IP communications titles from Cisco Press help networking professionals understand voice and IP telephony technologies, plan and design converged networks, and implement network solutions for increased productivity.

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Page Count

639

Publisher

Pearson Education

Published Date

ISBN 10

1587059479

ISBN 13

9781587059476

End-to-end Qos Network Design

By: Tim Szigeti,Christina Hattingh

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End-to-end Qos Network Design

By: Tim Szigeti,Christina Hattingh

Best-practice QoS designs for protecting voice, video, and critical data while mitigating network denial-of-service attacks Understand the service-level requirements of voice, video, and data applications Examine strategic QoS best practices, including Scavenger-class QoS tactics for DoS/worm mitigation Learn about QoS tools and the various interdependencies and caveats of these tools that can impact design considerations Learn how to protect voice, video, and data traffic using various QoS mechanisms Evaluate design recommendations for protecting voice, video, and multiple classes of data while mitigating DoS/worm attacks for the following network infrastructure architectures: campus LAN, private WAN, MPLS VPN, and IPSec VPN Quality of Service (QoS) has already proven itself as the enabling technology for the convergence of voice, video, and data networks. As business needs evolve, so do the demands for QoS. The need to protect critical applications via QoS mechanisms in business networks has escalated over the past few years, primarily due to the increased frequency and sophistication of denial-of-service (DoS) and worm attacks. End-to-End QoS Network Design is a detailed handbook for planning and deploying QoS solutions to address current business needs. This book goes beyond discussing available QoS technologies and considers detailed design examples that illustrate where, when, and how to deploy various QoS features to provide validated and tested solutions for voice, video, and critical data over the LAN, WAN, and VPN. The book starts with a brief background of network infrastructure evolution and the subsequent need for QoS. It then goes on to cover the various QoS features and tools currently available and comments on their evolution and direction. The QoS requirements of voice, interactive and streaming video, and multiple classes of data applications are presented, along with an overview of the nature and effects of various types of DoS and worm attacks. QoS best-practice design principles are introduced to show how QoS mechanisms can be strategically deployed end-to-end to address application requirements while mitigating network attacks. The next section focuses on how these strategic design principles are applied to campus LAN QoS design. Considerations and detailed design recommendations specific to the access, distribution, and core layers of an enterprise campus network are presented. Private WAN QoS design is discussed in the following section, where WAN-specific considerations and detailed QoS designs are presented for leased-lines, Frame Relay, ATM, ATM-to-FR Service Interworking, and ISDN networks. Branch-specific designs include Cisco® SAFE recommendations for using Network-Based Application Recognition (NBAR) for known-worm identification and policing. The final section covers Layer 3 VPN QoS design-for both MPLS and IPSec VPNs. As businesses are migrating to VPNs to meet their wide-area networking needs at lower costs, considerations specific to these topologies are required to be reflected in their customer-edge QoS designs. MPLS VPN QoS design is examined from both the enterprise and service provider's perspectives. Additionally, IPSec VPN QoS designs cover site-to-site and teleworker contexts. Whether you are looking for an introduction to QoS principles and practices or a QoS planning and deployment guide, this book provides you with the expert advice you need to design and implement comprehensive QoS solutions.

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Page Count

776

Publisher

Cisco Press

Published Date

ISBN 10

1587051761

ISBN 13

9781587051760

Access to Treaty Benefits

Series on International Tax Law, Volume 125

By: Desiree Auer,Christina Dimitropoulou

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Access to Treaty Benefits

Series on International Tax Law, Volume 125

By: Desiree Auer,Christina Dimitropoulou

A rigorous analysis of various aspects related to treaty access Tax treaty access is an ongoing challenge for both taxpayers and tax authorities. This volume provides a rigorous analysis of various aspects related to treaty access. Schematically, the volume is divided into four parts. The first part deals with general interpretative issues and principles; the second and third parts cover a wide range of sub-aspects relating to the subjective and objective scope of tax treaties and the recent challenges posed to tax treaty access, while the fourth part focuses on the knotty issues of treaty shopping and abuse. The structure of the volume reflects the necessity to approach access to treaty benefits in a holistic way and view the recent trends through a wide lens. All chapters contain a complete examination of the relevant topics, starting from a historical perspective and continuing with tax treaty law principles and tax practice analysis. Where appropriate, a domestic law and domestic courts’ jurisprudence perspective was added as well as a comparative analysis of several jurisdictions thus complementing the examination of each topic. Finally, special attention is given to treaty abuse and the new GAAR introduced in the 2017 OECD Model together with its interrelation with other treaty and domestic anti-abuse provisions and the impact of these provisions on tax treaty access and tax policy in general.

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Page Count

496

Publisher

Linde Verlag GmbH

Published Date

ISBN 10

3709411602

ISBN 13

9783709411605

End-to-end QoS Network Design

Quality of Service for Rich-Media and Cloud Networks

By: Tim Szigeti,Christina Hattingh,Robert Barton,Kenneth Briley

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End-to-end QoS Network Design

Quality of Service for Rich-Media and Cloud Networks

By: Tim Szigeti,Christina Hattingh,Robert Barton,Kenneth Briley

This authoritative guide to deploying, managing, and optimizing QoS with Cisco technologies has been thoroughly revamped to reflect the newest applications, best practices, hardware, software, and tools for modern networks. This new edition focuses on complex traffic mixes with increased usage of mobile devices, wireless network access, advanced communications, and video. It reflects the growing heterogeneity of video traffic, including passive streaming video, interactive video, and immersive videoconferences. It also addresses shifting bandwidth constraints and congestion points; improved hardware, software, and tools; and emerging QoS applications in network security. The authors first introduce QoS technologies in high-to-mid-level technical detail, including protocols, tools, and relevant standards. They examine new QoS demands and requirements, identify reasons to re-evaluate current QoS designs, and present new strategic design recommendations. Next, drawing on extensive experience, they offer deep technical detail on campus wired and wireless QoS design; next-generation wiring closets; QoS design for data centers, Internet edge, WAN edge, and branches; QoS for IPsec VPNs, and more.

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Page Count

1089

Publisher

Pearson Education

Published Date

ISBN 10

1587143690

ISBN 13

9781587143694

SIP Trunking

By: Christina Hattingh,Darryl Sladden,ATM Zakaria Swapan

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SIP Trunking

By: Christina Hattingh,Darryl Sladden,ATM Zakaria Swapan

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Page Count

639

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Pearson Education

Published Date

ISBN 10

1587059479

ISBN 13

9781587059476

When Life Unravels

By: Christine Christina

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When Life Unravels

By: Christine Christina

We all have an UN story to tell... UNLoved UNDeserving UNWorthy UNLikeable UNQualified UNAcceptable These are the words that described how Author Christine Cristina felt about herself for the majority of her life. Have you ever felt that way too? Do these words describe the lies you have accepted about yourself because of life experiences, or perhaps you have heard people say negative, hurtful things about you and it caused you to feel this way. Words are powerful. They can build you up or tear you down. It might be something someone has said about you or how you were treated, but oftentimes, we are too quick to accept the negative words spoken over us and we accept them as truth instead of dismissing them for the lies they really are. How can we put an end to it and see ourselves the way that God sees us? In this compelling new book, Author Christine Cristina shares her personal and sometimes painful journey of how her life UNRaveled in order for her to see herself the way God intended. As Christine turned to God and His Word, she began to get a glimpse of who she really is. UNStoppable UNSinkable UNLimited UNCommon UN Forgettable UN Shakable

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Page Count

156

Publisher

Emerge Publishing Group, LLC

Published Date

ISBN 10

1949758052

ISBN 13

9781949758054

Book's by Christina Hattingh

SIP Trunking

SIP Trunking

End-to-end Qos Network Design

End-to-end Qos Network Design

Access to Treaty Benefits

Access to Treaty Benefits

End-to-end QoS Network Design

End-to-end QoS Network Design

SIP Trunking

SIP Trunking

When Life Unravels

When Life Unravels

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