说明： Command Syntax Conventions The conventions used to present command syntax in this book are the same conventions used in the IOS Command Reference. The Command Reference describes these conventions as follows: • Boldface indicates commands and keywor <drjiachen> 上传 | 大小：10mb
说明： Introduction When I started this project, I had two requirements and I strived throughout the book to balance both of them. My first requirement comes from being an instructor and consultant for 10 years now. In that time, I have found a consistent <drjiachen> 上传 | 大小：2mb
说明： Preface Building and maintaining a network involves more than just making sure that packets can flow between devices on the network. As a network administrator, you also want to ensure that only the right people can access resources on your network, <drjiachen> 上传 | 大小：1mb
说明： About This Book Before we can delve into the world of conducting router and switch forensics on Cisco devices, we need to discuss what makes a network secure. Thirty years ago we were using mainframe computers and “security” meant nothing more than <drjiachen> 上传 | 大小：10mb
