SSCP · Question #791
A common way to create fault tolerance with leased lines is to group several T1s together with an inverse multiplexer placed:
The correct answer is B. at both ends of the connection. An inverse multiplexer (IMUX) splits a single high-bandwidth data stream across multiple lower-bandwidth circuits (such as T1 lines) and reassembles them at the other end. Because the IMUX performs both splitting (at the sending end) and reassembly (at the receiving end), a…
Question
A common way to create fault tolerance with leased lines is to group several T1s together with an inverse multiplexer placed:
Options
- Aat one end of the connection.
- Bat both ends of the connection.
- Csomewhere between both end points.
- Din the middle of the connection.
How the community answered
(53 responses)- A2% (1)
- B91% (48)
- C6% (3)
- D2% (1)
Explanation
An inverse multiplexer (IMUX) splits a single high-bandwidth data stream across multiple lower-bandwidth circuits (such as T1 lines) and reassembles them at the other end. Because the IMUX performs both splitting (at the sending end) and reassembly (at the receiving end), a device must be placed at both ends of the connection. This configuration provides fault tolerance because if one T1 line fails, the remaining T1s continue to carry traffic (with reduced bandwidth), rather than the entire connection going down. Placing the IMUX at only one end or in the middle would not allow proper splitting and reassembly of the data stream across both endpoints.
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