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SONET:  synchronous optical network, a digital transmission standard, was introduced in the United States in 1988. The level 1 electrical signal is denoted as STS-1, and the level 1 optical signal isdenoted as OC-1, with a rate of 51.84Mb / s. On this basis,upgrade throu...

The criteria for IPv4 were set out in the late 1970s. In the early 1990s, the application of WWW led to the explosive development of the Internet. With the increasingly complex Internet application types and the diversification of terminal , the provision of global indep...

Sometimes, we may need to execute the same piece of code many times. Generally,program statements are executed sequentially: the first statement in a function occurs first, followed by the second statement, and so on. Programming languages provide multiple control struct...

Optical module is a kind of network interconnection equipment to realize photoelectric signal conversion , and the transponder is a kind of network interconnection equipmen to realizw optical signal regenerative amplification and wavelength conversion. Although the optic...

10 GBASE-T is an important technology for transmitting data from 10G networks, and has been widely used since its introduction in 2006. 10 GBASE-T (ten gigabit copper cable) is an Ethernet specification connected by copper cable twisted pair, corresponding to the IEEE 80...

Describes how the C programmer creates, opens, and closes a text file, or a binary file. A file,means a series of bytes, whether it is a text file or a binary file,  C Language, not only provides the access to the top level functions, but also provides the underlying (OS...