Learning the Packet Delivery Process
2h 11mBeginner2021-06-24
Authors

Joli Ballew
IT Professor, Certified Trainer, Writer
Course details
So much of how the world works now depends on data, and how data gets from source to destination quickly and reliably. When most people type a query into a web browser, or turn on an alarm system from their phone, they don’t care how it happens, just that it happens. But if you’re a networking engineer, it’s your job to ensure that the systems that work together to move the data around run smoothly. If you’re just getting started in network engineering, the number of technologies involved may seem overwhelming. In this course, Joli Ballew works through the fundamentals, one step at a time, starting with an examination of the terms necessary to understand basic networking and the packet delivery process, followed by sections on network models, and the most common ports and protocols used in the data delivery process. She also covers hardware considerations, and closes with a detailed look at how the packet delivery process works in both local and remote scenarios.
Skills covered
Network AdministrationLearningNetwork and System Administration
Concepts
Introduction
- Data packet delivery across local and remote networks
- What you should know
Understand Network Technologies
- Understand differences between domains and local networks
- Distinguish among nodes, switches, and routers
- Understand the purpose of DHCP
- Dissect the IP address - Network and host
- Understand the importance of the MAC address
- Understand the data packet and TTL
- Challenge - Locate and name all nodes on a locate network
- Solution - Locate and name all nodes on a locate network
Explore Network Models
- Explore the OSI model
- Explore the TCP IP model
- Learn the purpose of the application layer
- Learn the purpose of the transport layer
- Learn the purpose of the network layer
- Learn the purpose of the network access layer
- Challenge - Compare mailing a letter to the TCP IP model
- Solution - Compare mailing a letter to the TCP IP model
Understand Network Ports and Protocols
- Learn port basics
- Explore ports 20, 21, 22, 23, 25, and 53, 80, 443
- Learn protocol basics
- Understand the three-way handshake
- Challenge - Show a port running, listening, and closed
- Solution - Show when a port is running, listening, and closed
Learn the Data Preparation Process
- Understand data encapsulation
- Understand the protocol data unit (PDU)
- Learn more about PDU headers
- Understand data de-encapsulation
- Challenge - Show TCP and UDP packets in a traffic analyzer
- Solution - Show TCP and UDP packets in a traffic analyzer
How Packet Delivery Works with Local Hosts
- Step 1 - A workstation sends data (local)
- Step 2 - The packet acquires delivery information (local)
- Step 3 - ARP helps locate MAC addresses (local)
- Step 4 - Network hardware reads, updates, and routes (local)
- Challenge - Test for and remediate packet loss
- Solution - Test for and remediate packet loss
How Packet Delivery Works with Remote Hosts
- Step 1 - A workstation sends data (remote)
- Step 2 - The packet acquires delivery information (remote)
- Step 3 - ARP helps locate the MAC addresses (remote)
- Step 4 - Network hardware reads, updates, and routes packets
- Challenge - Diagnose packet loss to a remote network
- Solution - Diagnose packet loss to a remote network
Conclusion
- Next steps with packet delivery