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31 Days Before Your CCNA Exam

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xii<strong>31</strong> <strong>Days</strong> <strong>Before</strong> <strong>Your</strong> <strong>CCNA</strong> <strong>Exam</strong>Troubleshooting VLAN and Trunking Problems 93Study Resources 95Day 22: VTP and InterVLAN Routing Configuration and Troubleshooting 97<strong>CCNA</strong> 640-802 <strong>Exam</strong> Topics 97Key Points 97VTP Configuration and Verification 97VTP Troubleshooting 102Inter-VLAN Routing Configuration and Verification 103Troubleshooting Inter-VLAN Routing 105Study Resources 106Part III: Addressing the Network 107Day 21: IPv4 Address Subnetting 109<strong>CCNA</strong> 640-802 <strong>Exam</strong> Topics 109Key Topics 109IPv4 Addressing 109Header Format 109Classes of Addresses 110Purpose of the Subnet Mask 111Subnetting in Four Steps 112Determine How Many Bits to Borrow 113Determine the New Subnet Mask 114Determine the Subnet Multiplier 114List the Subnets, Host Ranges, and Broadcast Addresses 114Subnetting <strong>Exam</strong>ple 1 114Subnetting <strong>Exam</strong>ple 2 115Subnetting <strong>Exam</strong>ple 3 115VLSM 116Summarizing Subnet Addresses 118Private and Public IP Addressing 119Study Resources 120

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