Author: Sysadmin and Ne Administrators Journals
Publisher: Independently Published
ISBN: 9781653823574
Category :
Languages : en
Pages : 124
Book Description
I'D TELL YOU A JOKE ABOUT UDP BUT YOU MIGHT NOT GET IT is a perfect journal to take notes, ideas and thoughts in the Office, Datacenter, School or College. Funny notebook for every Sysadmin, IT Administrator, Network Engineer, Security Engineer or DBA who loves IT Infrastructure, Information Systems, Software and Databases. Fill this notebook with all your ideas and memories and working notes as a planer. Use it to motivate yourself. Features of this journal: 6 x 9" inches Softcover Journal Book 120 matte pages (Grid / Graph Paper) Useful size for all purposes, can be taken in your purse, handbag, carrying case, backpack Great for taking notes, thoughts and ideas while being at work, at home or sitting in the bus or train
I'd Tell You A Joke About UDP But You Might Not Get It
Author: Sysadmin and Ne Administrators Journals
Publisher: Independently Published
ISBN: 9781653823574
Category :
Languages : en
Pages : 124
Book Description
I'D TELL YOU A JOKE ABOUT UDP BUT YOU MIGHT NOT GET IT is a perfect journal to take notes, ideas and thoughts in the Office, Datacenter, School or College. Funny notebook for every Sysadmin, IT Administrator, Network Engineer, Security Engineer or DBA who loves IT Infrastructure, Information Systems, Software and Databases. Fill this notebook with all your ideas and memories and working notes as a planer. Use it to motivate yourself. Features of this journal: 6 x 9" inches Softcover Journal Book 120 matte pages (Grid / Graph Paper) Useful size for all purposes, can be taken in your purse, handbag, carrying case, backpack Great for taking notes, thoughts and ideas while being at work, at home or sitting in the bus or train
Publisher: Independently Published
ISBN: 9781653823574
Category :
Languages : en
Pages : 124
Book Description
I'D TELL YOU A JOKE ABOUT UDP BUT YOU MIGHT NOT GET IT is a perfect journal to take notes, ideas and thoughts in the Office, Datacenter, School or College. Funny notebook for every Sysadmin, IT Administrator, Network Engineer, Security Engineer or DBA who loves IT Infrastructure, Information Systems, Software and Databases. Fill this notebook with all your ideas and memories and working notes as a planer. Use it to motivate yourself. Features of this journal: 6 x 9" inches Softcover Journal Book 120 matte pages (Grid / Graph Paper) Useful size for all purposes, can be taken in your purse, handbag, carrying case, backpack Great for taking notes, thoughts and ideas while being at work, at home or sitting in the bus or train
High Performance Browser Networking
Author: Ilya Grigorik
Publisher: "O'Reilly Media, Inc."
ISBN: 1449344720
Category :
Languages : en
Pages : 420
Book Description
How prepared are you to build fast and efficient web applications? This eloquent book provides what every web developer should know about the network, from fundamental limitations that affect performance to major innovations for building even more powerful browser applications—including HTTP 2.0 and XHR improvements, Server-Sent Events (SSE), WebSocket, and WebRTC. Author Ilya Grigorik, a web performance engineer at Google, demonstrates performance optimization best practices for TCP, UDP, and TLS protocols, and explains unique wireless and mobile network optimization requirements. You’ll then dive into performance characteristics of technologies such as HTTP 2.0, client-side network scripting with XHR, real-time streaming with SSE and WebSocket, and P2P communication with WebRTC. Deliver superlative TCP, UDP, and TLS performance Speed up network performance over 3G/4G mobile networks Develop fast and energy-efficient mobile applications Address bottlenecks in HTTP 1.x and other browser protocols Plan for and deliver the best HTTP 2.0 performance Enable efficient real-time streaming in the browser Create efficient peer-to-peer videoconferencing and low-latency applications with real-time WebRTC transports
Publisher: "O'Reilly Media, Inc."
ISBN: 1449344720
Category :
Languages : en
Pages : 420
Book Description
How prepared are you to build fast and efficient web applications? This eloquent book provides what every web developer should know about the network, from fundamental limitations that affect performance to major innovations for building even more powerful browser applications—including HTTP 2.0 and XHR improvements, Server-Sent Events (SSE), WebSocket, and WebRTC. Author Ilya Grigorik, a web performance engineer at Google, demonstrates performance optimization best practices for TCP, UDP, and TLS protocols, and explains unique wireless and mobile network optimization requirements. You’ll then dive into performance characteristics of technologies such as HTTP 2.0, client-side network scripting with XHR, real-time streaming with SSE and WebSocket, and P2P communication with WebRTC. Deliver superlative TCP, UDP, and TLS performance Speed up network performance over 3G/4G mobile networks Develop fast and energy-efficient mobile applications Address bottlenecks in HTTP 1.x and other browser protocols Plan for and deliver the best HTTP 2.0 performance Enable efficient real-time streaming in the browser Create efficient peer-to-peer videoconferencing and low-latency applications with real-time WebRTC transports
CompTIA Network+ N10-005 Exam Cram
Author: Emmett Dulaney
Publisher: Pearson Education
ISBN: 0132883619
Category : Computers
Languages : en
Pages : 718
Book Description
Prepare for CompTIA Network+ N10-005 exam success with this CompTIA Authorized Exam Cram from Pearson IT Certification, a leader in IT Certification learning and a CompTIA Authorized Platinum Partner. This is the eBook version of the print title. Note that the eBook does not provide access to the practice test software that accompanies the print book. Limited Time Offer: Buy CompTIA Network+ N10-005 Authorized Exam Cram and receive a 10% off discount code for the CompTIA Network+ N10-005 exam. To receive your 10% off discount code: Register your product at pearsonITcertification.com/register When prompted, enter ISBN number 9780789748218 Go to your Account page and click on “Access Bonus Content” CompTIA® Network+ N10-005 Authorized Exam Cram, Fourth Edition is the perfect study guide to help you pass CompTIA’s new Network+ N10-005 exam. It provides coverage and practice questions for every exam topic, including substantial new coverage of security, wireless, and voice networking. Covers the critical information you’ll need to know to score higher on your Network+ (N10-005) exam! Understand modern network topologies, protocols, and models Work effectively with DNS and DHCP Monitor and analyze network traffic Understand IP addressing, routing, and switching Perform basic router/switch installation and configuration Manage networks and utilize basic optimization techniques Plan and implement a small office/home office network Master essential LAN, WAN, and wireless technologies Install, configure, secure, and troubleshoot wireless networks Safeguard networks with VPNs, authentication, firewalls, and security appliances Troubleshoot common problems with routers, switches, and physical connectivity EMMETT DULANEY (Network+, A+, Security+) is a columnist for CertCites, an associate professor at Anderson University, and the author of numerous certification guides including CompTIA A+ Complete Study Guide and CompTIA Security+ Study Guide. MICHAEL HARWOOD (MCSE, A+, Network+, Server+, Linux+) has more than 14 years of IT experience in roles including network administrator, instructor, technical writer, website designer, consultant, and online marketing strategist. He regularly discusses technology topics on Canada’s CBC Radio.
Publisher: Pearson Education
ISBN: 0132883619
Category : Computers
Languages : en
Pages : 718
Book Description
Prepare for CompTIA Network+ N10-005 exam success with this CompTIA Authorized Exam Cram from Pearson IT Certification, a leader in IT Certification learning and a CompTIA Authorized Platinum Partner. This is the eBook version of the print title. Note that the eBook does not provide access to the practice test software that accompanies the print book. Limited Time Offer: Buy CompTIA Network+ N10-005 Authorized Exam Cram and receive a 10% off discount code for the CompTIA Network+ N10-005 exam. To receive your 10% off discount code: Register your product at pearsonITcertification.com/register When prompted, enter ISBN number 9780789748218 Go to your Account page and click on “Access Bonus Content” CompTIA® Network+ N10-005 Authorized Exam Cram, Fourth Edition is the perfect study guide to help you pass CompTIA’s new Network+ N10-005 exam. It provides coverage and practice questions for every exam topic, including substantial new coverage of security, wireless, and voice networking. Covers the critical information you’ll need to know to score higher on your Network+ (N10-005) exam! Understand modern network topologies, protocols, and models Work effectively with DNS and DHCP Monitor and analyze network traffic Understand IP addressing, routing, and switching Perform basic router/switch installation and configuration Manage networks and utilize basic optimization techniques Plan and implement a small office/home office network Master essential LAN, WAN, and wireless technologies Install, configure, secure, and troubleshoot wireless networks Safeguard networks with VPNs, authentication, firewalls, and security appliances Troubleshoot common problems with routers, switches, and physical connectivity EMMETT DULANEY (Network+, A+, Security+) is a columnist for CertCites, an associate professor at Anderson University, and the author of numerous certification guides including CompTIA A+ Complete Study Guide and CompTIA Security+ Study Guide. MICHAEL HARWOOD (MCSE, A+, Network+, Server+, Linux+) has more than 14 years of IT experience in roles including network administrator, instructor, technical writer, website designer, consultant, and online marketing strategist. He regularly discusses technology topics on Canada’s CBC Radio.
Computer and Information Security Handbook
Author: John R. Vacca
Publisher: Newnes
ISBN: 0123946123
Category : Computers
Languages : en
Pages : 1200
Book Description
The second edition of this comprehensive handbook of computer and information security provides the most complete view of computer security and privacy available. It offers in-depth coverage of security theory, technology, and practice as they relate to established technologies as well as recent advances. It explores practical solutions to many security issues. Individual chapters are authored by leading experts in the field and address the immediate and long-term challenges in the authors' respective areas of expertise. The book is organized into 10 parts comprised of 70 contributed chapters by leading experts in the areas of networking and systems security, information management, cyber warfare and security, encryption technology, privacy, data storage, physical security, and a host of advanced security topics. New to this edition are chapters on intrusion detection, securing the cloud, securing web apps, ethical hacking, cyber forensics, physical security, disaster recovery, cyber attack deterrence, and more. - Chapters by leaders in the field on theory and practice of computer and information security technology, allowing the reader to develop a new level of technical expertise - Comprehensive and up-to-date coverage of security issues allows the reader to remain current and fully informed from multiple viewpoints - Presents methods of analysis and problem-solving techniques, enhancing the reader's grasp of the material and ability to implement practical solutions
Publisher: Newnes
ISBN: 0123946123
Category : Computers
Languages : en
Pages : 1200
Book Description
The second edition of this comprehensive handbook of computer and information security provides the most complete view of computer security and privacy available. It offers in-depth coverage of security theory, technology, and practice as they relate to established technologies as well as recent advances. It explores practical solutions to many security issues. Individual chapters are authored by leading experts in the field and address the immediate and long-term challenges in the authors' respective areas of expertise. The book is organized into 10 parts comprised of 70 contributed chapters by leading experts in the areas of networking and systems security, information management, cyber warfare and security, encryption technology, privacy, data storage, physical security, and a host of advanced security topics. New to this edition are chapters on intrusion detection, securing the cloud, securing web apps, ethical hacking, cyber forensics, physical security, disaster recovery, cyber attack deterrence, and more. - Chapters by leaders in the field on theory and practice of computer and information security technology, allowing the reader to develop a new level of technical expertise - Comprehensive and up-to-date coverage of security issues allows the reader to remain current and fully informed from multiple viewpoints - Presents methods of analysis and problem-solving techniques, enhancing the reader's grasp of the material and ability to implement practical solutions
Cisco NAC Appliance
Author: Jamey Heary
Publisher: Pearson Education
ISBN: 0132796791
Category : Computers
Languages : en
Pages : 698
Book Description
Cisco NAC Appliance Enforcing Host Security with Clean Access Authenticate, inspect, remediate, and authorize end-point devices using Cisco NAC Appliance Jamey Heary, CCIE® No. 7680 Contributing authors: Jerry Lin, CCIE No. 6469, Chad Sullivan, CCIE No. 6493, and Alok Agrawal With today's security challenges and threats growing more sophisticated, perimeter defense alone is no longer sufficient. Few organizations are closed entities with well-defined security perimeters, which has led to the creation of perimeterless networks with ubiquitous access. Organizations need to have internal security systems that are more comprehensive, pervasive, and tightly integrated than in the past. Cisco® Network Admission Control (NAC) Appliance, formerly known as Cisco Clean Access, provides a powerful host security policy inspection, enforcement, and remediation solution that is designed to meet these new challenges. Cisco NAC Appliance allows you to enforce host security policies on all hosts (managed and unmanaged) as they enter the interior of the network, regardless of their access method, ownership, device type, application set, or operating system. Cisco NAC Appliance provides proactive protection at the network entry point. Cisco NAC Appliance provides you with all the information needed to understand, design, configure, deploy, and troubleshoot the Cisco NAC Appliance solution. You will learn about all aspects of the NAC Appliance solution including configuration and best practices for design, implementation, troubleshooting, and creating a host security policy. Jamey Heary, CCIE® No. 7680, is a security consulting systems engineer at Cisco, where he works with its largest customers in the northwest United States. Jamey joined Cisco in 2000 and currently leads its Western Security Asset team and is a field advisor for its U.S. Security Virtual team. His areas of expertise include network and host security design and implementation, security regulatory compliance, and routing and switching. His other certifications include CISSP, CCSP®, and Microsoft MCSE. He is also a Certified HIPAA Security Professional. He has been working in the IT field for 13 years and in IT security for 9 years. Understand why network attacks and intellectual property losses can originate from internal network hosts Examine different NAC Appliance design options Build host security policies and assign the appropriate network access privileges for various user roles Streamline the enforcement of existing security policies with the concrete measures NAC Appliance can provide Set up and configure the NAC Appliance solution Learn best practices for the deployment of NAC Appliance Monitor, maintain, and troubleshoot the Cisco NAC Appliance solution This security book is part of the Cisco Press® Networking Technology Series. Security titles from Cisco Press help networking professionals secure critical data and resources, prevent and mitigate network attacks, and build end-to-end self-defending networks. Category: Cisco Press–Security Covers: End-Point Security
Publisher: Pearson Education
ISBN: 0132796791
Category : Computers
Languages : en
Pages : 698
Book Description
Cisco NAC Appliance Enforcing Host Security with Clean Access Authenticate, inspect, remediate, and authorize end-point devices using Cisco NAC Appliance Jamey Heary, CCIE® No. 7680 Contributing authors: Jerry Lin, CCIE No. 6469, Chad Sullivan, CCIE No. 6493, and Alok Agrawal With today's security challenges and threats growing more sophisticated, perimeter defense alone is no longer sufficient. Few organizations are closed entities with well-defined security perimeters, which has led to the creation of perimeterless networks with ubiquitous access. Organizations need to have internal security systems that are more comprehensive, pervasive, and tightly integrated than in the past. Cisco® Network Admission Control (NAC) Appliance, formerly known as Cisco Clean Access, provides a powerful host security policy inspection, enforcement, and remediation solution that is designed to meet these new challenges. Cisco NAC Appliance allows you to enforce host security policies on all hosts (managed and unmanaged) as they enter the interior of the network, regardless of their access method, ownership, device type, application set, or operating system. Cisco NAC Appliance provides proactive protection at the network entry point. Cisco NAC Appliance provides you with all the information needed to understand, design, configure, deploy, and troubleshoot the Cisco NAC Appliance solution. You will learn about all aspects of the NAC Appliance solution including configuration and best practices for design, implementation, troubleshooting, and creating a host security policy. Jamey Heary, CCIE® No. 7680, is a security consulting systems engineer at Cisco, where he works with its largest customers in the northwest United States. Jamey joined Cisco in 2000 and currently leads its Western Security Asset team and is a field advisor for its U.S. Security Virtual team. His areas of expertise include network and host security design and implementation, security regulatory compliance, and routing and switching. His other certifications include CISSP, CCSP®, and Microsoft MCSE. He is also a Certified HIPAA Security Professional. He has been working in the IT field for 13 years and in IT security for 9 years. Understand why network attacks and intellectual property losses can originate from internal network hosts Examine different NAC Appliance design options Build host security policies and assign the appropriate network access privileges for various user roles Streamline the enforcement of existing security policies with the concrete measures NAC Appliance can provide Set up and configure the NAC Appliance solution Learn best practices for the deployment of NAC Appliance Monitor, maintain, and troubleshoot the Cisco NAC Appliance solution This security book is part of the Cisco Press® Networking Technology Series. Security titles from Cisco Press help networking professionals secure critical data and resources, prevent and mitigate network attacks, and build end-to-end self-defending networks. Category: Cisco Press–Security Covers: End-Point Security
Learning Kali Linux
Author: Ric Messier
Publisher: "O'Reilly Media, Inc."
ISBN: 1492028657
Category : Computers
Languages : en
Pages : 392
Book Description
With more than 600 security tools in its arsenal, the Kali Linux distribution can be overwhelming. Experienced and aspiring security professionals alike may find it challenging to select the most appropriate tool for conducting a given test. This practical book covers Kaliâ??s expansive security capabilities and helps you identify the tools you need to conduct a wide range of security tests and penetration tests. Youâ??ll also explore the vulnerabilities that make those tests necessary. Author Ric Messier takes you through the foundations of Kali Linux and explains methods for conducting tests on networks, web applications, wireless security, password vulnerability, and more. Youâ??ll discover different techniques for extending Kali tools and creating your own toolset. Learn tools for stress testing network stacks and applications Perform network reconnaissance to determine whatâ??s available to attackers Execute penetration tests using automated exploit tools such as Metasploit Use cracking tools to see if passwords meet complexity requirements Test wireless capabilities by injecting frames and cracking passwords Assess web application vulnerabilities with automated or proxy-based tools Create advanced attack techniques by extending Kali tools or developing your own Use Kali Linux to generate reports once testing is complete
Publisher: "O'Reilly Media, Inc."
ISBN: 1492028657
Category : Computers
Languages : en
Pages : 392
Book Description
With more than 600 security tools in its arsenal, the Kali Linux distribution can be overwhelming. Experienced and aspiring security professionals alike may find it challenging to select the most appropriate tool for conducting a given test. This practical book covers Kaliâ??s expansive security capabilities and helps you identify the tools you need to conduct a wide range of security tests and penetration tests. Youâ??ll also explore the vulnerabilities that make those tests necessary. Author Ric Messier takes you through the foundations of Kali Linux and explains methods for conducting tests on networks, web applications, wireless security, password vulnerability, and more. Youâ??ll discover different techniques for extending Kali tools and creating your own toolset. Learn tools for stress testing network stacks and applications Perform network reconnaissance to determine whatâ??s available to attackers Execute penetration tests using automated exploit tools such as Metasploit Use cracking tools to see if passwords meet complexity requirements Test wireless capabilities by injecting frames and cracking passwords Assess web application vulnerabilities with automated or proxy-based tools Create advanced attack techniques by extending Kali tools or developing your own Use Kali Linux to generate reports once testing is complete
Professional C# 4.0 and .NET 4
Author: Christian Nagel
Publisher: John Wiley & Sons
ISBN: 0470632534
Category : Computers
Languages : en
Pages : 1852
Book Description
This is the ultimate guide to C# 4 and the .NET 4 framework. Updated with more coverage of intermediate and advanced features, new examples, and detailed discussions of recent language and framework additions, this book covers everything you will need to know about C# and putting it to work. You will also find in-depth reviews of various topics including traditional Windows programming, working in Visual Studio 2010 with C#, base Class Libraries, and communication with Enterprise Services among others.
Publisher: John Wiley & Sons
ISBN: 0470632534
Category : Computers
Languages : en
Pages : 1852
Book Description
This is the ultimate guide to C# 4 and the .NET 4 framework. Updated with more coverage of intermediate and advanced features, new examples, and detailed discussions of recent language and framework additions, this book covers everything you will need to know about C# and putting it to work. You will also find in-depth reviews of various topics including traditional Windows programming, working in Visual Studio 2010 with C#, base Class Libraries, and communication with Enterprise Services among others.
Network Flow Analysis
Author: Michael W. Lucas
Publisher: No Starch Press
ISBN: 1593273002
Category : Computers
Languages : en
Pages : 228
Book Description
You know that servers have log files and performance measuring tools and that traditional network devices have LEDs that blink when a port does something. You may have tools that tell you how busy an interface is, but mostly a network device is a black box. Network Flow Analysis opens that black box, demonstrating how to use industry-standard software and your existing hardware to assess, analyze, and debug your network. Unlike packet sniffers that require you to reproduce network problems in order to analyze them, flow analysis lets you turn back time as you analyze your network. You'll learn how to use open source software to build a flow-based network awareness system and how to use network analysis and auditing to address problems and improve network reliability. You'll also learn how to use a flow analysis system; collect flow records; view, filter, and report flows; present flow records graphically; and use flow records to proactively improve your network. Network Flow Analysis will show you how to: –Identify network, server, router, and firewall problems before they become critical –Find defective and misconfigured software –Quickly find virus-spewing machines, even if they’re on a different continent –Determine whether your problem stems from the network or a server –Automatically graph the most useful data And much more. Stop asking your users to reproduce problems. Network Flow Analysis gives you the tools and real-world examples you need to effectively analyze your network flow data. Now you can determine what the network problem is long before your customers report it, and you can make that silly phone stop ringing.
Publisher: No Starch Press
ISBN: 1593273002
Category : Computers
Languages : en
Pages : 228
Book Description
You know that servers have log files and performance measuring tools and that traditional network devices have LEDs that blink when a port does something. You may have tools that tell you how busy an interface is, but mostly a network device is a black box. Network Flow Analysis opens that black box, demonstrating how to use industry-standard software and your existing hardware to assess, analyze, and debug your network. Unlike packet sniffers that require you to reproduce network problems in order to analyze them, flow analysis lets you turn back time as you analyze your network. You'll learn how to use open source software to build a flow-based network awareness system and how to use network analysis and auditing to address problems and improve network reliability. You'll also learn how to use a flow analysis system; collect flow records; view, filter, and report flows; present flow records graphically; and use flow records to proactively improve your network. Network Flow Analysis will show you how to: –Identify network, server, router, and firewall problems before they become critical –Find defective and misconfigured software –Quickly find virus-spewing machines, even if they’re on a different continent –Determine whether your problem stems from the network or a server –Automatically graph the most useful data And much more. Stop asking your users to reproduce problems. Network Flow Analysis gives you the tools and real-world examples you need to effectively analyze your network flow data. Now you can determine what the network problem is long before your customers report it, and you can make that silly phone stop ringing.
CCNP Complete Study Guide
Author: Wade Edwards
Publisher: John Wiley & Sons
ISBN: 0782150667
Category : Computers
Languages : en
Pages : 1422
Book Description
The Most Comprehensive and Current CCNP Self-Study Solution on the Market! Here's the comprehensive and economical self-study solution that will provide you with the knowledge and skills needed to approach the CCNP exams with confidence. This Study Guide was developed to meet the exacting requirements of today's certification candidates. In addition to the consistent and accessible instructional approach that has earned Sybex the reputation as the leading publisher for certification study guides, this book provides: Clear and concise information on configuring and managing Cisco internetworks Practical examples and insights drawn from real-world experience Leading-edge exam preparation software, including a testing engine and electronic flashcards And of course, you'll find in-depth coverage of all official objectives for all four exams required for the CCNP: 642-801: Building Scalable Cisco Internetworks 642-811: Building Cisco Multilayer Switched Networks 642-821: Building Cisco Remote Access Networks 642-831: Cisco Internetwork Troubleshooting Support
Publisher: John Wiley & Sons
ISBN: 0782150667
Category : Computers
Languages : en
Pages : 1422
Book Description
The Most Comprehensive and Current CCNP Self-Study Solution on the Market! Here's the comprehensive and economical self-study solution that will provide you with the knowledge and skills needed to approach the CCNP exams with confidence. This Study Guide was developed to meet the exacting requirements of today's certification candidates. In addition to the consistent and accessible instructional approach that has earned Sybex the reputation as the leading publisher for certification study guides, this book provides: Clear and concise information on configuring and managing Cisco internetworks Practical examples and insights drawn from real-world experience Leading-edge exam preparation software, including a testing engine and electronic flashcards And of course, you'll find in-depth coverage of all official objectives for all four exams required for the CCNP: 642-801: Building Scalable Cisco Internetworks 642-811: Building Cisco Multilayer Switched Networks 642-821: Building Cisco Remote Access Networks 642-831: Cisco Internetwork Troubleshooting Support
Network World
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 60
Book Description
For more than 20 years, Network World has been the premier provider of information, intelligence and insight for network and IT executives responsible for the digital nervous systems of large organizations. Readers are responsible for designing, implementing and managing the voice, data and video systems their companies use to support everything from business critical applications to employee collaboration and electronic commerce.
Publisher:
ISBN:
Category :
Languages : en
Pages : 60
Book Description
For more than 20 years, Network World has been the premier provider of information, intelligence and insight for network and IT executives responsible for the digital nervous systems of large organizations. Readers are responsible for designing, implementing and managing the voice, data and video systems their companies use to support everything from business critical applications to employee collaboration and electronic commerce.