Author: Wayne Lawson
Publisher: Elsevier
ISBN: 0080476147
Category : Computers
Languages : en
Pages : 609
Book Description
An increasing number of companies are designing and implementing Remote Access Networks, which allow users who are not physically connected to a Wide Area Network (WAN) or Local Area Network (LAN) to access the network's servers, applications and databases or to participate in video conferencing and conference calls. The ability for a remote user to function as if they were in the next office dramatically improves overall efficiency while reducing total cost of ownership. Cisco Systems, the world's largest internetworking vendor, is the pioneer of the enabling technologies for Remote Access Networks. This book will identify and explain all of the Cisco products necessary for designing and building a remote access network and integrating it with legacy systems.This book is a professional reference detailing all of the strategies, tactics and methods for designing, configuring and maintaining Cisco Remote Access Networks. It will include thorough discussions of all Cisco Access Servers and routers.* Demand for information on remote access networks is growing quickly at corporate and administrator level* Cisco remote access networks appeal to businesses as they provide efficient and secure connectivity at reduced cost* Book includes thorough discussions of all Cisco Access Servers and routers
Building Cisco Remote Access Networks
Author: Wayne Lawson
Publisher: Elsevier
ISBN: 0080476147
Category : Computers
Languages : en
Pages : 609
Book Description
An increasing number of companies are designing and implementing Remote Access Networks, which allow users who are not physically connected to a Wide Area Network (WAN) or Local Area Network (LAN) to access the network's servers, applications and databases or to participate in video conferencing and conference calls. The ability for a remote user to function as if they were in the next office dramatically improves overall efficiency while reducing total cost of ownership. Cisco Systems, the world's largest internetworking vendor, is the pioneer of the enabling technologies for Remote Access Networks. This book will identify and explain all of the Cisco products necessary for designing and building a remote access network and integrating it with legacy systems.This book is a professional reference detailing all of the strategies, tactics and methods for designing, configuring and maintaining Cisco Remote Access Networks. It will include thorough discussions of all Cisco Access Servers and routers.* Demand for information on remote access networks is growing quickly at corporate and administrator level* Cisco remote access networks appeal to businesses as they provide efficient and secure connectivity at reduced cost* Book includes thorough discussions of all Cisco Access Servers and routers
Publisher: Elsevier
ISBN: 0080476147
Category : Computers
Languages : en
Pages : 609
Book Description
An increasing number of companies are designing and implementing Remote Access Networks, which allow users who are not physically connected to a Wide Area Network (WAN) or Local Area Network (LAN) to access the network's servers, applications and databases or to participate in video conferencing and conference calls. The ability for a remote user to function as if they were in the next office dramatically improves overall efficiency while reducing total cost of ownership. Cisco Systems, the world's largest internetworking vendor, is the pioneer of the enabling technologies for Remote Access Networks. This book will identify and explain all of the Cisco products necessary for designing and building a remote access network and integrating it with legacy systems.This book is a professional reference detailing all of the strategies, tactics and methods for designing, configuring and maintaining Cisco Remote Access Networks. It will include thorough discussions of all Cisco Access Servers and routers.* Demand for information on remote access networks is growing quickly at corporate and administrator level* Cisco remote access networks appeal to businesses as they provide efficient and secure connectivity at reduced cost* Book includes thorough discussions of all Cisco Access Servers and routers
Troubleshooting Microsoft Technologies
Author: Chris Wolf
Publisher: Addison-Wesley Professional
ISBN: 9780321133458
Category : Computers
Languages : en
Pages : 740
Book Description
bull; Addresses the topic on which network administrators most need help - troubleshooting. bull; Comprehensive - covers Windows Server 2003, Windows XP, Office, Active Directory, and more. bull; The first book to cover troubleshooting Microsoft networks.
Publisher: Addison-Wesley Professional
ISBN: 9780321133458
Category : Computers
Languages : en
Pages : 740
Book Description
bull; Addresses the topic on which network administrators most need help - troubleshooting. bull; Comprehensive - covers Windows Server 2003, Windows XP, Office, Active Directory, and more. bull; The first book to cover troubleshooting Microsoft networks.
CCNP: Cisco Internetwork Troubleshooting Study Guide
Author: Arthur Pfund
Publisher: John Wiley & Sons
ISBN: 0782150934
Category : Computers
Languages : en
Pages : 557
Book Description
Here's the book you need to prepare the latest Cisco Internetwork Troubleshooting Support (CIT) exam, 642-831. This Study Guide provides: In-depth coverage of key exam topics Practical information on troubleshooting and optimizing Cisco internetworks Hundreds of challenging review questions Leading-edge exam preparation software, including a test engine, sample simulation questions, and electronic flashcards Authoritative coverage of all exam objectives, including: Establishing an optimal system baseline Diagramming and documenting system topology and end system configuration Verifying connectivity at all layers Selecting an optimal troubleshooting approach Planning a network documentation system and baseline monitoring scheme Using Cisco IOS commands and applications to identify and isolate system problems Resolving sub-optimal system performance problems Restoring optimal baseline service Working with external providers and system users to resolve service provision problems Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.
Publisher: John Wiley & Sons
ISBN: 0782150934
Category : Computers
Languages : en
Pages : 557
Book Description
Here's the book you need to prepare the latest Cisco Internetwork Troubleshooting Support (CIT) exam, 642-831. This Study Guide provides: In-depth coverage of key exam topics Practical information on troubleshooting and optimizing Cisco internetworks Hundreds of challenging review questions Leading-edge exam preparation software, including a test engine, sample simulation questions, and electronic flashcards Authoritative coverage of all exam objectives, including: Establishing an optimal system baseline Diagramming and documenting system topology and end system configuration Verifying connectivity at all layers Selecting an optimal troubleshooting approach Planning a network documentation system and baseline monitoring scheme Using Cisco IOS commands and applications to identify and isolate system problems Resolving sub-optimal system performance problems Restoring optimal baseline service Working with external providers and system users to resolve service provision problems Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.
Complete Book of Remote Access
Author: Victor Kasacavage
Publisher: CRC Press
ISBN: 142000042X
Category : Computers
Languages : en
Pages : 390
Book Description
As technology advances, the demand and necessity for seamless connectivity and stable access to servers and networks is increasing exponentially. Unfortunately the few books out there on remote access focus on Cisco certification preparation, one aspect of network connectivity or security. This text covers both-the enabling technology and how to ma
Publisher: CRC Press
ISBN: 142000042X
Category : Computers
Languages : en
Pages : 390
Book Description
As technology advances, the demand and necessity for seamless connectivity and stable access to servers and networks is increasing exponentially. Unfortunately the few books out there on remote access focus on Cisco certification preparation, one aspect of network connectivity or security. This text covers both-the enabling technology and how to ma
CCIE Practical Studies
Author: Karl Solie
Publisher: Cisco Press
ISBN: 9781587050725
Category : Electronic books
Languages : en
Pages : 1076
Book Description
bull; Gain CCIE lab exam experience with volume 2 of the best-selling CCIE Practical Studies. bull; Experience putting concepts into practice with lab scenarios that guide you in applying what you know onto real networks. bull; Learn how to build a practice lab for your CCIE lab exam preparation. bull; Use detailed labs and configuration exercises to learn technologies needed to succeed on the exam.
Publisher: Cisco Press
ISBN: 9781587050725
Category : Electronic books
Languages : en
Pages : 1076
Book Description
bull; Gain CCIE lab exam experience with volume 2 of the best-selling CCIE Practical Studies. bull; Experience putting concepts into practice with lab scenarios that guide you in applying what you know onto real networks. bull; Learn how to build a practice lab for your CCIE lab exam preparation. bull; Use detailed labs and configuration exercises to learn technologies needed to succeed on the exam.
CCSP Cisco Secure VPN Exam Certification Guide
Author: John F. Roland
Publisher: Cisco Press
ISBN: 9781587200700
Category : Business & Economics
Languages : en
Pages : 598
Book Description
The only Cisco authorized exam certification guide for the new CSVPN exam offers pre- and post-chapter quizzes help to assess knowledge and identify areas of weakness. Overviews and foundation summaries present complete and quick review of all CSVPN exam topics.
Publisher: Cisco Press
ISBN: 9781587200700
Category : Business & Economics
Languages : en
Pages : 598
Book Description
The only Cisco authorized exam certification guide for the new CSVPN exam offers pre- and post-chapter quizzes help to assess knowledge and identify areas of weakness. Overviews and foundation summaries present complete and quick review of all CSVPN exam topics.
Network Security Fundamentals
Author: Gert De Laet
Publisher: Cisco Press
ISBN: 1587051672
Category : Computers
Languages : en
Pages : 481
Book Description
An introduction to the world of network security, this work shows readers how to learn the basics, including cryptography, security policies, and secure network design.
Publisher: Cisco Press
ISBN: 1587051672
Category : Computers
Languages : en
Pages : 481
Book Description
An introduction to the world of network security, this work shows readers how to learn the basics, including cryptography, security policies, and secure network design.
MCSE/MCSA Implementing and Administering Security in a Windows 2000 Network (Exam 70-214)
Author: Syngress
Publisher: Elsevier
ISBN: 0080479316
Category : Computers
Languages : en
Pages : 865
Book Description
This book covers Exam 200-14 in great detail, digging into some of the most important details involved in locking down Windows systems and networks and taking a systemic approach to keeping Windows networks and systems secured.Boasting a one-of-a-kind integration of text, DVD-quality instructor-led training, and Web-based exam simulation and remediation, this study guide & DVD training system gives students 100% coverage of official Microsoft MCSA exam objectives plus realistic test prep.The System package consists of:1) MCSE Implementing and Administering Security in a Windows 2000 Network Study Guide: Syngress's 1 million study guide users will find tried-and-true features and exciting new enhancements; included are step-by-step exercises plus end-of-chapter bulleted objectives reviews, FAQs, and realistic test prep questions in the same format as those on the actual exam.2) Security DVD: A full hour of instructor-led training, complete with on-screen configurations and networking schematics, demystifying the toughest exam topics.3) Security from [email protected]. Accompanying Web site provides students with authentic interactive exam-simulation software that grades their results and automatically links to e-book study guide for instant review of answer concepts.Covers Critical Security Exam. This exam was created to meet the demand for a security-based examination which verifies an administrator's ability to implement and maintain secure Windows 2000 network.Fast growing certification gains in popularity. The new MCSE certification launched in March and already there are 17,000 MCSA-certified professionals (data as of May, 31, 2002, Microsoft Corp.). This exam also serves as an elective for MCP status and other certifications.Best selling author with over 150,000 copies in print. Tom Shinder's books have over 150,000 copies in print and he's a regular speaker at the security industry's leading Black Hat Briefings. His Configuring ISA Server 2000, has sold over 45,000 units worldwide in a year.First in-depth security exam from Microsoft. As Microsoft certification guru Ed Tittell points out, "this is the first real, nuts-and-bolts security exam in the MCP line-up. This exam is the first MCP test to really dig into some of the most important details involved in locking down Windows systems and networks in the first place, and to step systematically through the processes involved in keeping Windows networks and systems secured thereafter."$2,000 worth of training wrapped in a $60 book/DVD/Web-enhanced training system. Certification Magazine's 2001 reader survey revealed that the average certification costs nearly $2,000. So our low-priced study package delivers unsurpassed value for cost-conscious IT departments and trainees.
Publisher: Elsevier
ISBN: 0080479316
Category : Computers
Languages : en
Pages : 865
Book Description
This book covers Exam 200-14 in great detail, digging into some of the most important details involved in locking down Windows systems and networks and taking a systemic approach to keeping Windows networks and systems secured.Boasting a one-of-a-kind integration of text, DVD-quality instructor-led training, and Web-based exam simulation and remediation, this study guide & DVD training system gives students 100% coverage of official Microsoft MCSA exam objectives plus realistic test prep.The System package consists of:1) MCSE Implementing and Administering Security in a Windows 2000 Network Study Guide: Syngress's 1 million study guide users will find tried-and-true features and exciting new enhancements; included are step-by-step exercises plus end-of-chapter bulleted objectives reviews, FAQs, and realistic test prep questions in the same format as those on the actual exam.2) Security DVD: A full hour of instructor-led training, complete with on-screen configurations and networking schematics, demystifying the toughest exam topics.3) Security from [email protected]. Accompanying Web site provides students with authentic interactive exam-simulation software that grades their results and automatically links to e-book study guide for instant review of answer concepts.Covers Critical Security Exam. This exam was created to meet the demand for a security-based examination which verifies an administrator's ability to implement and maintain secure Windows 2000 network.Fast growing certification gains in popularity. The new MCSE certification launched in March and already there are 17,000 MCSA-certified professionals (data as of May, 31, 2002, Microsoft Corp.). This exam also serves as an elective for MCP status and other certifications.Best selling author with over 150,000 copies in print. Tom Shinder's books have over 150,000 copies in print and he's a regular speaker at the security industry's leading Black Hat Briefings. His Configuring ISA Server 2000, has sold over 45,000 units worldwide in a year.First in-depth security exam from Microsoft. As Microsoft certification guru Ed Tittell points out, "this is the first real, nuts-and-bolts security exam in the MCP line-up. This exam is the first MCP test to really dig into some of the most important details involved in locking down Windows systems and networks in the first place, and to step systematically through the processes involved in keeping Windows networks and systems secured thereafter."$2,000 worth of training wrapped in a $60 book/DVD/Web-enhanced training system. Certification Magazine's 2001 reader survey revealed that the average certification costs nearly $2,000. So our low-priced study package delivers unsurpassed value for cost-conscious IT departments and trainees.
Advanced Host Intrusion Prevention with CSA
Author: Chad Sullivan
Publisher: Cisco Press
ISBN: 1587052520
Category : Computers
Languages : en
Pages : 330
Book Description
Protecting systems within an enterprise has proven as important to overall security as securing the enterprise perimeter. Over the past few years, the number of vulnerabilities stemming from weaknesses in applications and operating systems has grown dramatically. In direct correlation with the number of weaknesses discovered, the number of viruses, worms, and security attacks has also exploded across the Internet. To add to the typical virus issues that businesses have had to confront, there are also malicious programs infiltrating organizations today in the form of spyware and adware. Prevent day-zero attacks Enforce acceptable-use policies Develop host-IPS project implementation plans Evaluate management hierarchy installation options, including single-server, multiserver, and built-in database usage Learn about CSA agents and manual and scripted installation options Understand policy components and custom policy creation Use and filter information from CSA event logs Troubleshoot CSA deployments with agent and management server logs and built-in troubleshooting tools Protecting systems where the private data and intellectual property resides is no longer considered a function of perimeter defense systems but has instead become the domain of endpoint protection software, such as host Intrusion Prevention Systems (IPS). Cisco® Security Agent (CSA) is the Cisco Systems® host-IPS solution. CSA provides the security controls that corporations need to deal with threats to host and desktop computing resources. Advanced Host Intrusion Prevention with CSA is a practical guide to getting the most out of CSA deployments. Through methodical explanation of advanced CSA features and concepts, this book helps ease the fears of security administrators seeking to install and configure a host IPS. This book explains in detail such topics as installation of the management servers, installation of the agents for mass deployment, granular agent policy creation, advanced policy creation, real-world troubleshooting techniques, and best practices in implementation methodology. This guide also provides a practical installation framework taken from the actual installation and support experience of the authors. This book helps you implement host IPS appropriately, giving your organization better protection from the various threats that are impacting your business while at the same time enabling you to comply with various legal requirements put forth in such legislation as HIPAA, SOX, SB1386, and VISA PCI.
Publisher: Cisco Press
ISBN: 1587052520
Category : Computers
Languages : en
Pages : 330
Book Description
Protecting systems within an enterprise has proven as important to overall security as securing the enterprise perimeter. Over the past few years, the number of vulnerabilities stemming from weaknesses in applications and operating systems has grown dramatically. In direct correlation with the number of weaknesses discovered, the number of viruses, worms, and security attacks has also exploded across the Internet. To add to the typical virus issues that businesses have had to confront, there are also malicious programs infiltrating organizations today in the form of spyware and adware. Prevent day-zero attacks Enforce acceptable-use policies Develop host-IPS project implementation plans Evaluate management hierarchy installation options, including single-server, multiserver, and built-in database usage Learn about CSA agents and manual and scripted installation options Understand policy components and custom policy creation Use and filter information from CSA event logs Troubleshoot CSA deployments with agent and management server logs and built-in troubleshooting tools Protecting systems where the private data and intellectual property resides is no longer considered a function of perimeter defense systems but has instead become the domain of endpoint protection software, such as host Intrusion Prevention Systems (IPS). Cisco® Security Agent (CSA) is the Cisco Systems® host-IPS solution. CSA provides the security controls that corporations need to deal with threats to host and desktop computing resources. Advanced Host Intrusion Prevention with CSA is a practical guide to getting the most out of CSA deployments. Through methodical explanation of advanced CSA features and concepts, this book helps ease the fears of security administrators seeking to install and configure a host IPS. This book explains in detail such topics as installation of the management servers, installation of the agents for mass deployment, granular agent policy creation, advanced policy creation, real-world troubleshooting techniques, and best practices in implementation methodology. This guide also provides a practical installation framework taken from the actual installation and support experience of the authors. This book helps you implement host IPS appropriately, giving your organization better protection from the various threats that are impacting your business while at the same time enabling you to comply with various legal requirements put forth in such legislation as HIPAA, SOX, SB1386, and VISA PCI.
Cisco Express Forwarding
Author: Nakia Stringfield
Publisher: Pearson Education
ISBN: 1587058529
Category : Computers
Languages : en
Pages : 288
Book Description
Cisco Express Forwarding Understanding and troubleshooting CEF in Cisco routers and switches Nakia Stringfield, CCIE� No. 13451 Russ White, CCIE No. 2635 Stacia McKee How does a router switch a packet? What is the difference between routing a packet, switching a frame, and packet switching? What is the Cisco� Express Forwarding (CEF) feature referred to in Cisco documentation and commonly found in Cisco IOS� commands? CEF is a general term that describes the mechanism by which Cisco routers and Catalyst� switches packet-switch (route) frames. CEF is found in almost all Cisco routers and Catalyst switches, and understanding how CEF operates can improve the performance, scalability, and efficiency of your network. Cisco Express Forwarding demystifies the internal workings of Cisco routers and switches, making it easier for you to optimize performance and troubleshoot issues that arise in Cisco network environments. This book addresses common misconceptions about CEF and packet switching across various platforms, helping you to improve your troubleshooting skills for CEF- and non-CEF-related problems. The first part of the book provides an overview of packet-switching architectures and CEF operation and advanced features. It also covers the enhanced CEF structure and general troubleshooting. The second part of the book provides case studies that focus on the common topics that have been problematic for customers and those supporting Cisco networks. Full of practical examples and configurations, this book draws on years of experience to help you keep your Cisco networks running efficiently. Nakia Stringfield, CCIE� No. 13451, is a network consulting engineer for Advanced Services at Cisco, supporting top financial customers with network design and applying best practices. She was formerly a senior customer support engineer for the Routing Protocols Technical Assistance Center (TAC) team troubleshooting issues related to CEF and routing protocols. Nakia has been with Cisco for more than six years, previously serving as a technical leader for the Architecture TAC team. Russ White, CCIE No. 2635, is a Principle Engineer in the Routing Protocol Design and Architecture team at Cisco. He is a member of the IETF Routing Area Directorate, co-chair of the Routing Protocols Security Working Group in the IETF, a regular speaker at Cisco Networkers, a member of the CCIE Content Advisory Group, and the coauthor of six other books about routing and routing protocols, including Optimal Routing Design from Cisco Press. Russ primarily works in the development of new features and design architectures for routing protocols. Stacia McKee is a customer support engineer and technical leader of the Routing Protocols Technical Assistance Center (TAC) team. This team focuses on providing post-sales support of IP routing protocols, MPLS, QoS, IP multicast, and many other Layer 3 technologies. Stacia has been with Cisco for more than six years, previously serving as a technical leader of the Architecture TAC team and a member of the WAN/Access TAC team. Learn the key features of packet-switching architectures Understand the basics of the CEF architecture and operation Examine the enhanced CEF structure, which improves scalability Learn how to troubleshoot in software-switching environments Understand the effect of CEF on a Cisco Catalyst 6500 Supervisor 720 Configure and troubleshoot load sharing with CEF Evaluate the effect of CEF in an MPLS VPN environment Review CEF design considerations that impact scalability Part I Understanding, Configuring, and Troubleshooting CEF Chapter 1 Introduction to Packet-Switching Architectures Chapter 2 Understanding Cisco Express Forwarding Chapter 3 CEF Enhanced Scalability Chapter 4 Basic IP Connectivity and CEF Troubleshooting Part II CEF Case Studies Chapter 5 Understanding Packet Switching on the Cisco Catalyst 6500 Supervisor 720 Chapter 6 Load Sharing with CEF Chapter 7 Understanding CEF in an MPLS VPN Environment Part III Appendix Appendix A Scalability This book is part of the Networking Technology Series from Cisco Press�, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers. Category: Networking Covers: Routing and Switching 1587052369
Publisher: Pearson Education
ISBN: 1587058529
Category : Computers
Languages : en
Pages : 288
Book Description
Cisco Express Forwarding Understanding and troubleshooting CEF in Cisco routers and switches Nakia Stringfield, CCIE� No. 13451 Russ White, CCIE No. 2635 Stacia McKee How does a router switch a packet? What is the difference between routing a packet, switching a frame, and packet switching? What is the Cisco� Express Forwarding (CEF) feature referred to in Cisco documentation and commonly found in Cisco IOS� commands? CEF is a general term that describes the mechanism by which Cisco routers and Catalyst� switches packet-switch (route) frames. CEF is found in almost all Cisco routers and Catalyst switches, and understanding how CEF operates can improve the performance, scalability, and efficiency of your network. Cisco Express Forwarding demystifies the internal workings of Cisco routers and switches, making it easier for you to optimize performance and troubleshoot issues that arise in Cisco network environments. This book addresses common misconceptions about CEF and packet switching across various platforms, helping you to improve your troubleshooting skills for CEF- and non-CEF-related problems. The first part of the book provides an overview of packet-switching architectures and CEF operation and advanced features. It also covers the enhanced CEF structure and general troubleshooting. The second part of the book provides case studies that focus on the common topics that have been problematic for customers and those supporting Cisco networks. Full of practical examples and configurations, this book draws on years of experience to help you keep your Cisco networks running efficiently. Nakia Stringfield, CCIE� No. 13451, is a network consulting engineer for Advanced Services at Cisco, supporting top financial customers with network design and applying best practices. She was formerly a senior customer support engineer for the Routing Protocols Technical Assistance Center (TAC) team troubleshooting issues related to CEF and routing protocols. Nakia has been with Cisco for more than six years, previously serving as a technical leader for the Architecture TAC team. Russ White, CCIE No. 2635, is a Principle Engineer in the Routing Protocol Design and Architecture team at Cisco. He is a member of the IETF Routing Area Directorate, co-chair of the Routing Protocols Security Working Group in the IETF, a regular speaker at Cisco Networkers, a member of the CCIE Content Advisory Group, and the coauthor of six other books about routing and routing protocols, including Optimal Routing Design from Cisco Press. Russ primarily works in the development of new features and design architectures for routing protocols. Stacia McKee is a customer support engineer and technical leader of the Routing Protocols Technical Assistance Center (TAC) team. This team focuses on providing post-sales support of IP routing protocols, MPLS, QoS, IP multicast, and many other Layer 3 technologies. Stacia has been with Cisco for more than six years, previously serving as a technical leader of the Architecture TAC team and a member of the WAN/Access TAC team. Learn the key features of packet-switching architectures Understand the basics of the CEF architecture and operation Examine the enhanced CEF structure, which improves scalability Learn how to troubleshoot in software-switching environments Understand the effect of CEF on a Cisco Catalyst 6500 Supervisor 720 Configure and troubleshoot load sharing with CEF Evaluate the effect of CEF in an MPLS VPN environment Review CEF design considerations that impact scalability Part I Understanding, Configuring, and Troubleshooting CEF Chapter 1 Introduction to Packet-Switching Architectures Chapter 2 Understanding Cisco Express Forwarding Chapter 3 CEF Enhanced Scalability Chapter 4 Basic IP Connectivity and CEF Troubleshooting Part II CEF Case Studies Chapter 5 Understanding Packet Switching on the Cisco Catalyst 6500 Supervisor 720 Chapter 6 Load Sharing with CEF Chapter 7 Understanding CEF in an MPLS VPN Environment Part III Appendix Appendix A Scalability This book is part of the Networking Technology Series from Cisco Press�, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers. Category: Networking Covers: Routing and Switching 1587052369