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ABSTRACT:
Experts have been predicting the death of RS-232 for decades, and yet it continues to serve us well. It is a highly proven technology that is inexpensive and easy to implement. And it is well understood and widely accepted in IT and related endeavors.
The RS-232 standard refers to two classes of devices: Data Terminal Equipment (DTE) and Data Circuit Terminating Equipment (DCE). Classically, the DTE component is a computer or a terminal. These days, a router is often the DTE piece of the puzzle. In the past, the DCE component was usually a modem connected to the public, switched telephone network, but now you are likely to find a CSU/DSU instead that connects to a digital leased line (like a T1, for
instance) or maybe a Terminal Adapter (TA, for ISDN).
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Author
George Mays
Course Director
,
Global Knowledge
George Mays has over 35 years of experience in computing, data communications, and networking, including mainframe systems programmer, Fortune 500 DBA, management of systems programming, data communications, IT operations, engineering, software development, and networking. He is also the author and course director for Global Knowledge’s Network+ Boot Camp and has contributed to several hacking and security books. He is an instructor in TCP/IP, Troubleshooting, Network Protocols, Network Fundamentals, A+, Security+m and CISSP. George holds various industry certifications including CISSP, CCNA, A+, Network+, Security+, INet+, and he acts as a consultant in the fields of general networking and security.
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