The goal of this article is to outline the profile of a whole computer network of broad-brush-like manner.
Learning about the contents include:
1, understand the basic terminology and concepts;
2, see the basic hardware and software components constituting the network;
3, starting from the edge of the network, network investigation cutting system, network application;
4, about the core computer network, and switches to view the data transmission link;
5, the access network end systems and network physical media connected to the core;
6, and broader level of abstraction investigated computer network: data latency, packet loss, throughput;
7, some of the key principles of the architecture of computer networking: protocol layering and service models;
8, so that the computer-implemented method discussed more secure;
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1, understand the basic terminology and concepts;
The Internet is a particular public computer network;
Mobile devices, computers, tablet, sensors, etc. Network access computer terms are called the host or end system .
End system via a communication link and a packet switch connected together.
Communication link from the composition of different types of physical media may include coaxial cables, copper wire, fiber optic, radio spectrum and the like;
Different links can be at different data transmission rates, the transmission rate of the link in bits / second metric (bit / s).
When an end system to another end system want to transmit data, the book