200-301 Question 493
Single answerA network administrator is configuring a communication link for a serial connection between two routers. The administrator needs to ensure that the data is transmitted efficiently, with minimal errors, using a method that represents binary data as high and low voltages over the physical medium. Which data encoding method should the administrator choose for this scenario?
- A
Non-Return-to-Zero (NRZ)
- B
Manchester Encoding
- C
4B/5B Encoding
- D
Pulse Code Modulation (PCM)
Show answer and explanation
Correct answer: A
Explanation
For serial communication, Non-Return-to-Zero (NRZ) is a suitable and efficient encoding method. It represents binary data using distinct voltage levels for '0' and '1', ensuring reliable data transmission over the link. Other options, such as Manchester Encoding and 4B/5B Encoding, are used in other specific network technologies but are not optimized for this scenario.
- A. Correct.
Non-Return-to-Zero (NRZ) is commonly used for serial communication links and represents binary data as two distinct voltage levels (high and low). It is efficient and widely implemented in such scenarios.
- B. Incorrect.
Manchester Encoding is used in Ethernet networks and combines clock and data signals into one, but it is less efficient in terms of bandwidth compared to NRZ for serial connections.
- C. Incorrect.
4B/5B Encoding is used in Fast Ethernet and other technologies, but it is not typically applied to serial communication links.
- D. Incorrect.
Pulse Code Modulation (PCM) is used for digitizing analog signals, such as in telephony, and is unrelated to binary data encoding in serial communication.