Introduction
Data packet delivery across local and remote networks
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What you should know
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1. Understand Network Technologies
Understand differences between domains and local networks
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Distinguish among nodes, switches, and routers
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Understand the purpose of DHCP
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Dissect the IP address: Network and host
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Understand the importance of the MAC address
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Understand the data packet and TTL
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Challenge: Locate and name all nodes on a locate network
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Solution: Locate and name all nodes on a locate network
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2. Explore Network Models
Explore the OSI model
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Explore the TCP/IP model
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Learn the purpose of the application layer
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Learn the purpose of the transport layer
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Learn the purpose of the network layer
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Learn the purpose of the network access layer
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Challenge: Compare mailing a letter to the TCP/IP model
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Solution: Compare mailing a letter to the TCP/IP model
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3. Understand Network Ports and Protocols
Learn port basics
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Explore ports 20, 21, 22, 23, 25, and 53, 80, 443
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Learn protocol basics
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Understand the three-way handshake
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Challenge: Show a port running, listening, and closed
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Solution: Show when a port is running, listening, and closed
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4. Learn the Data Preparation Process
Understand data encapsulation
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Understand the protocol data unit (PDU)
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Learn more about PDU headers
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Understand data de-encapsulation
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Challenge: Show TCP and UDP packets in a traffic analyzer
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Solution: Show TCP and UDP packets in a traffic analyzer
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5. How Packet Delivery Works with Local Hosts
Step 1: A workstation sends data (local)
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Step 2: The packet acquires delivery information (local)
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Step 3: ARP helps locate MAC addresses (local)
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Step 4: Network hardware reads, updates, and routes (local)
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Challenge: Test for and remediate packet loss
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Solution: Test for and remediate packet loss
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6. How Packet Delivery Works with Remote Hosts
Step 1: A workstation sends data (remote)
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Step 2: The packet acquires delivery information (remote)
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Step 3: ARP helps locate the MAC addresses (remote)
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Step 4: Network hardware reads, updates, and routes packets
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Challenge: Diagnose packet loss to a remote network
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Solution: Diagnose packet loss to a remote network
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Conclusion
Next steps with packet delivery
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