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Cisco CCNA Security Notes (640-553)

Contents
Contents ....................................................................................................................................................... 1 Introduction .................................................................................................................................................. 3 Cisco Security Management Tools ........................................................................................................... 4 Control of Data ......................................................................................................................................... 4 Security Policy........................................................................................................................................... 5 Risk............................................................................................................................................................ 6 System Development Life Cycle (SDLC) .................................................................................................... 6 Understanding the Risks ............................................................................................................................... 7 Layer 2 risks .............................................................................................................................................. 8 Layer 3 risks .............................................................................................................................................. 9 Upper Layer risks .................................................................................................................................... 11 Physical ................................................................................................................................................... 12 Configuring Devices .................................................................................................................................... 13 Basic device Configuration ..................................................................................................................... 13 AAA ......................................................................................................................................................... 15 User Privileges ........................................................................................................................................ 17 Logon Security ........................................................................................................................................ 18 AutoSecure and One Step Lock Down .................................................................................................... 19 Logging.................................................................................................................................................... 21 NTP ......................................................................................................................................................... 22 Layer 2 security ........................................................................................................................................... 23 Port Security ........................................................................................................................................... 23 802.1x Port Security / Network Admission Control (NAC) ..................................................................... 24 Storm Control ......................................................................................................................................... 24 Span ports (Switchport Analyser) ........................................................................................................... 25 Securing VLANs...
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