The Hierarchical internetworking model is a three-layer model for network design first proposed by Cisco in 1998.[1] The hierarchical design model divides enterprise networks into three layers: core, distribution, and access.
End-stations and servers connect to the enterprise at the access layer. Access layer devices are usually commodity switching platforms, and may or may not provide layer 3 switching services. The traditional focus at the access layer is minimizing "cost-per-port": the amount of investment the enterprise must make for each provisioned Ethernet port. This layer is also called the desktop layer because it focuses on connecting client nodes, such as workstations to the network.
Distribution layeredit
The distribution layer is the smart layer in the three-layer model. Routing, filtering, and QoS policies are managed at the distribution layer. Distribution layer devices also often manage individual branch-office WAN connections. This layer is also called the Workgroup layer.
Core layeredit
The core layer is the backbone of a network, where the internet(internetwork) gateways are located. The core network provides high-speed, highly redundant forwarding services to move packets between distribution-layer devices in different regions of the network. Core switches and routers are usually the most powerful, in terms of raw forwarding power, in the enterprise; core network devices manage the highest-speed connections, such as 10 Gigabit Ethernet or 100 Gigabit Ethernet.
Khalid Raza, Mark Turner (1998), "Chapter 4. Network Topology and Design", Large-Scale IP Network Solutions, Cisco Press, ISBN978-1-57870-084-4
High Availability Campus Network Design, Cisco, 2008, retrieved 2022-04-05 PDF
Referencesedit
^Haviland, Geoff (1998). . Cisco Systems. Archived from the original (White Paper) on 2000-11-09. Retrieved 2023-12-16.
April 11, 2024
hierarchical, internetworking, model, this, article, includes, list, general, references, lacks, sufficient, corresponding, inline, citations, please, help, improve, this, article, introducing, more, precise, citations, january, 2016, learn, when, remove, this. This article includes a list of general references but it lacks sufficient corresponding inline citations Please help to improve this article by introducing more precise citations January 2016 Learn how and when to remove this template message The Hierarchical internetworking model is a three layer model for network design first proposed by Cisco in 1998 1 The hierarchical design model divides enterprise networks into three layers core distribution and access Contents 1 Access layer 2 Distribution layer 3 Core layer 4 See also 5 ReferencesAccess layer editEnd stations and servers connect to the enterprise at the access layer Access layer devices are usually commodity switching platforms and may or may not provide layer 3 switching services The traditional focus at the access layer is minimizing cost per port the amount of investment the enterprise must make for each provisioned Ethernet port This layer is also called the desktop layer because it focuses on connecting client nodes such as workstations to the network Distribution layer editThe distribution layer is the smart layer in the three layer model Routing filtering and QoS policies are managed at the distribution layer Distribution layer devices also often manage individual branch office WAN connections This layer is also called the Workgroup layer Core layer editThe core layer is the backbone of a network where the internet internetwork gateways are located The core network provides high speed highly redundant forwarding services to move packets between distribution layer devices in different regions of the network Core switches and routers are usually the most powerful in terms of raw forwarding power in the enterprise core network devices manage the highest speed connections such as 10 Gigabit Ethernet or 100 Gigabit Ethernet See also editMulti tier architecture Service layer Hierarchical Network Design Connecting Networks Companion Guide Cisco Press 2014 retrieved 2023 12 16 PDF Khalid Raza Mark Turner 1998 Chapter 4 Network Topology and Design Large Scale IP Network Solutions Cisco Press ISBN 978 1 57870 084 4 High Availability Campus Network Design Cisco 2008 retrieved 2022 04 05 PDFReferences edit Haviland Geoff 1998 Designing High Performance Campus Intranets with Multilayer Switching Cisco Systems Archived from the original White Paper on 2000 11 09 Retrieved 2023 12 16 PDF Retrieved from https en wikipedia org w index php title Hierarchical internetworking model amp oldid 1190399029, wikipedia, wiki, book, books, library,
