Which of the following statements is TRUE about data transmission modes?
Parallel transmission can transmit multiple bits simultaneously
Data can be moved between digital devices in two fundamental transmission modes, distinguished by how many bits travel at the same instant. Understanding the trade-off between them is the key to this question.
The two modes compared:
| Feature | Serial transmission | Parallel transmission |
|---|---|---|
| Bits per instant | One bit at a time, sequentially | Multiple bits simultaneously |
| Number of data lines | Single channel (fewer wires) | Many lines, one per bit |
| Typical speed / distance | Slower per line, but suited to long distances | Fast over short distances; suffers skew over long runs |
| Examples | USB, RS-232, Ethernet | Old printer ports, internal data buses |
From this comparison, the true statement is Parallel transmission can transmit multiple bits simultaneously, which is the defining property of parallel transfer (for example, 8 bits sent together over 8 wires).
The other statements are false. Saying serial transmission always requires more communication lines reverses reality — serial uses fewer lines, which is one of its main advantages. Claiming serial transmission sends multiple bits simultaneously contradicts its definition, since serial sends bits one after another. And parallel transmission sends one bit at a time also describes serial, not parallel. Hence only the statement about parallel handling multiple bits at once is correct.
Similar Questions
Consider the following statements about RS-232 ports and connectors.
S1: DB9 connector is associated with RS-232
S2: RS-232 uses RJ45 connector for standard serial communication
S3: RS-232 communication is point-to-point.
Which statements are TRUE?
Consider the following statements regarding modems used in computer network:
S1: Modems are required when communication medium carries analog signals
S2: Modulation converts digital data into analog form
S3: Demodulation converts analog data into digital form
S4: Modems assign MAC addresses to computers.
Which statements are TRUE?
Important Questions from Physical Layer
period of a signal is 100 ms. Then the frequency The of this signal in kilohertz is ______.
In the standard Ethernet with transmission rate of 10 Mbps, asssume that the length of the medium is 2500 m and size of a frame is 512 bytes. The propagation speed of a signal in a cable is normally 2 × 108 m/s. The transmission delay and propogation delay are
Which of the following statement(s) is/are correct?
I. Metropolitan area network is a collection of Local area network.
II. Metropolitan area network support both data and voices transmission.
Data transmission using multiple pathways simultaneously is known as:
- Which layer is responsible for sending data as a bit stream?
