Join Todd Lammle for an in-depth discussion in this video Overview of TCP/IP model, part of Cert Prep: Cisco Certified Entry Networking Technician (100-105).
- The Transmission Control Protocol Internet Protocol suite better known as TCPIP, was designed and implemented by the US Department of Defense, to ensure and preserve data integrity as well as maintain communication in the event of catastrophic war. If designed and implemented correctly, a TCPIP network can be secure, dependable and resilient. I'll begin by exploring the DOD's version of TCPIP then I'll compare that version and it's protocols with the OSI reference model that we discussed earlier.
The DOD Model is basically a condensed version of the OSI model that's comprised of four instead of seven layers. The four layers are Process/Application, Transport, Internet and Link. This graphic offers a comparison of the DoD Model and the OSI reference Model. As you can see the two are similar in concept, but each has a different number of layers. With different names. I'll focus on a few of the most important applications found in the season objectives. First, it's worth noting that CISCO sometimes uses multiple names for the same layer.
The transport layer is also referred to as Host-to-Host, while Network Access and Link are used to the describe the Physical and Data Link layers. A vast array of protocols join forces in the DoD Process/Application layer. These processes combine the OSI Model's top three layers. Application, Presentation and Session. In short, the Process/Application layer defines protocols for node-to-node application communication and controls user interface specifications. The DoD Transport layer parallels the functions of the OSI's Transport layer.
Define protocols for setting up the levels of transmission service for applications. It tackles issues like creating reliable end-to-end communication and ensuring error-free delivery of data. It handles Packet Sequencing and maintains data integrity. The internet layer corresponds to the OSI's network layer, designating the protocols relating to the logical transmission of packets over the entire network. It takes care of host addressing by giving them an IP address and handles the routing of packets among multiple networks.
At the bottom of the DoD Model, the Network Access layer or Link layer implements the data exchange between the host and the network. The equivalent of the Data Link and Physical layers of the OSI Model, the Network Access layer oversees hardware addressing and defines protocols for the physical transmission of data. TCPIP became so popular, because there are no set Physical layer specifications. So it can run on any existing or future physical network.
Author
Released
9/30/2016For more information on the CCENT exam, visit Cisco's website.
- Overview of internetworking
- Ethernet
- The TCP/IP networking model
- Easy subnetting
- VLSM
- Managing Cisco IOS
- Managing Cisco networks and devices
- IP routing
- Layer 2 switching
- VLANs and InterVLAN routing
- Security
- Network address translation
- IPv6
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome54s
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The CCNA exam58s
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Lab environment overview1m 3s
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1. Internetworking
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Internetworking devices4m 20s
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2. Ethernet
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Ethernet overview2m 23s
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Ethernet addressing3m 51s
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Ethernet cables4m 55s
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3. Introduction to TCP/IP
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Overview of TCP/IP model2m 40s
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Application/process layer2m 19s
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Internet layer3m 37s
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IP addressing4m 33s
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4. Easy Subnetting
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Subnet basics1m 28s
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Subnet block sizing5m 25s
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Subnet by example5m 6s
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Class B subnetting3m 53s
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5. VLSM, Summarization, and Troubleshooting TCP/IP
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VLSM2m 38s
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VLSM by hand6m 28s
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6. Cisco Internetworking Operating System (IOS)
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Introduction to the IOS CLI3m 55s
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Basic CLI commands5m 23s
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Telnet and SSH5m 4s
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7. Managing a Cisco Internetwork
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Router and switch components2m 27s
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Configure DHCP3m 48s
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8. IP Routing
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Overview of IP routing3m 45s
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The IP routing process3m 50s
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Configure IP routing6m 41s
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Static routing5m 28s
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Default routing5m 36s
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Configure RIPv26m 52s
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Verify RIPv2 routing5m 55s
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9. Layer 2 Switching
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Configure a Catalyst switch7m 33s
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Configure port security5m 5s
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10. VLANs and InterVLAN Routing (IVR)
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Overview of VLANs3m 2s
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Configure VLANs3m 8s
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Configure trunk links5m 15s
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Configure IVR on a router2m 42s
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11. Security
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Introduction to access lists2m 24s
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Configure access lists4m 3s
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12. Network Address Translation (NAT)
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Introduction to NAT2m 18s
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Static NAT2m 53s
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Configure static NAT3m 11s
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Dynamic NAT2m 44s
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Configure dynamic NAT3m 44s
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NAT overload (PAT)3m 56s
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Configure NAT overload5m 26s
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13. IPv6
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Introduction to IPv62m 22s
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Overview of ICMPv62m 55s
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Configure IPv66m 7s
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Conclusion
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Next steps51s
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Video: Overview of TCP/IP model