1. What protocol is used for noiseless channels to transmit frames with flow control
but without error control?
a) Stop-and-wait protocol
b) Go-Back-N ARQ
c) Selective Repeat ARQ
d) HDLC

2. In stop-and-wait protocol, what does the sender do after transmitting one frame?
a) Transmits the next frame immediately
b) Waits for an acknowledgment
c) Resends the same frame
d) Encrypts the next frame

3. What is a characteristic of the simplest protocol for a noiseless channel?
a) Bidirectional data flow
b) Requires acknowledgment
c) Involves intermediate processing
d) Direct transfer of data from source to destination

4. What additional elements are included in stop-and-wait ARQ for noisy channels?
a) Checksum and parity bit
b) Timeout timer and sequence number
c) Encryption and compression
d) Flow control and error control

5. What does ARQ stand for in data transmission?
a) Automatic Repeat Query
b) Automatic Repeat Request
c) Automatic Retry Query
d) Automatic Retry Request