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Network Design

Design considerations for computer networks cover a wide range of topics including layout, capacity planning, and security.
Network Topologies
Common network topologies include the bus topology, star, and ring. Learn more about these and other topologies in computer network design.
Visual Overview of the OSI Model
The OSI model provides a good conceptual framework for understanding the implementation of network protocol and services design. This page explains the OSI model through visual illustration.
Introduction to Area Networks
Besides LANs and WANs, other types of area networks like MAN and SAN also exist. Discover all the different forms of area networks and the roles they play in network design.
Network Design - Bandwidth and Latency
Two critical elements of network design are the bandwidth and latency a network supports.
Network Gateway
A network gateway joins two networks together through a combination of hardware and software.
QoS - Quality of Service
QoS technologies support levels of predictable performance for network systems. Elements of QoS include availability (uptime), bandwidth (throughput), latency (delay), and error rate.
The 5-4-3-2-1 Rule of Network Design
This rule of thumb proves useful especially when planning a business network layout.
PAN - Personal Area Network
A personal area network (PAN) is a computer network organized around an individual person. Personal area networks typically include a mobile computer, a cell phone and/or a handheld computing device such as a PDA.
Symmetric and Asymmetric Networking
In a symmetric network, all devices normally can transmit and receive data at equal rates, whereas asymmetric networks support disproportianately more bandwidth in one direction than the other. Symmetric and asymmetric network designs also pertain to management of resources as in P2P and network encryption architectures.
Computer Network Topology Diagrams
A computer network topology is the physical communication scheme used by connected devices. These pages illustrate the common computer network topologies with diagrams including bus, ring and star topology diagrams.

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