Data Communication MCQs with Answers
Practice important Data Communication MCQs with answers and explanations.
Chapter: 200
Q3081:
An STS-1 frame consists of _______.
A. 9 rows and 90 columns
B. 9 rows and 270 columns
C. 9 rows and 81 columns
D. 10 rows and 90 columns
Correct Answer:
A
Chapter: 200
Q3082:
How many bytes are there in an STS-1 frame?
A. 810 bytes
B. 2430 bytes
C. 720 bytes
D. 819 bytes
Correct Answer:
A
Chapter: 200
Q3083:
What is the size of an STS-3 frame?
A. 9 rows by 270 columns (2430 bytes)
B. 9 rows by 90 columns (810 bytes)
C. 9 rows by 180 columns (1620 bytes
D. 9 rows by 360 columns (3240 bytes)
Correct Answer:
A
Chapter: 200
Q3084:
Fill in the blank: The STS-1 frame consists of _______ bytes.
A. 810 bytes
B. 2430 bytes
C. 640 bytes
D. 1024 bytes
Correct Answer:
A
Chapter: 200
Q3085:
Fill in the blank: Each STS frame is a _______ matrix with 9 rows.
A. 2D
B. 3D
C. 1D
D. Flat
Correct Answer:
A
Chapter: 200
Q3086:
The data rate of an STS-1 signal is calculated by _______.
A. Multiplying the frame size by the number of frames per second
B. Multiplying the column size by the number of rows
C. Multiplying the number of rows by the bytes in each column
D. Dividing the total frame size by the number of frames
Correct Answer:
B
Chapter: 200
Q3087:
The data rate of an STS-3 signal can be calculated by _______.
A. Multiplying the frame size of STS-1 by 3
B. Multiplying the frame size of STS-3 by 2
C. Multiplying the column size by 3
D. Dividing the number of frames by 3
Correct Answer:
A
Chapter: 200
Q3088:
How is the frame structure in STS signals arranged?
A. It is a matrix with 9 rows and columns of varying lengths
B. A linear sequence of bytes
C. A random distribution of data
D. Multiple segments with individual bytes
Correct Answer:
A
Chapter: 200
Q3089:
Which of the following is the correct frame size for an STS-1 signal?
A. 9 rows by 90 columns (810 bytes)
B. 9 rows by 270 columns (2430 bytes)
C. 8 rows by 80 columns (640 bytes)
D. 9 rows by 80 columns (720 bytes)
Correct Answer:
A
Chapter: 200
Q3090:
An STS-n frame has _______ rows by _______ columns, with n representing the level of the signal.
A. 9, 90×n
B. 9, 270×n
C. 9, 80×n
D. 10, 100×n
Correct Answer:
A
Chapter: 200
Q3091:
What is the role of the frame size in determining the data rate of an STS signal?
A. The larger the frame, the higher the data rate
B. The smaller the frame, the higher the data rate
C. The frame size is unrelated to data rate
D. The frame size only affects transmission quality
Correct Answer:
A
Chapter: 200
Q3092:
Fill in the blank: To calculate the data rate of an STS-n signal, you must multiply the frame size by _______.
A. The number of frames per second
B. Power of the signal
C. Column size
D. The total bytes in the frame
Correct Answer:
A
Chapter: 200
Q3093:
Which of the following is true about the STS-1 and STS-3 frame structures?
A. STS-3 has more columns than STS-1
B. STS-1 has fewer bytes than STS-3
C. STS-3 has a smaller frame size than STS-1
D. STS-1 and STS-3 have the same number of frames
Correct Answer:
A
Chapter: 200
Q3094:
The size of an STS-3 frame is _______.
A. 9 rows by 270 columns (2430 bytes)
B. 9 rows by 90 columns (810 bytes)
C. 10 rows by 270 columns (2430 bytes)
D. 8 rows by 270 columns (2430 bytes)
Correct Answer:
A
Chapter: 200
Q3095:
What is the purpose of the "rows by columns" structure in an STS frame?
A. It organizes the data into manageable units for transfer
B. Stores data in separate partitions for security
C. Divides the data into logical layers for encryption
D. Assists with compression and data packing
Correct Answer:
A
Chapter: 200
Q3096:
Which of the following statements is correct about STS signals?
A. STS-1 has a smaller data rate than STS-3
B. STS-1 and STS-3 have identical data rates
C. STS-3 frames are smaller than STS-1 frames
D. STS-1 has larger frames than STS-3
Correct Answer:
A
Chapter: 200
Q3097:
Fill in the blank: Each STS signal frame can be broken down into a matrix of _______ bytes.
A. 810
B. 2430
C. 1620
D. 640
Correct Answer:
A
Chapter: 200
Q3098:
How is the data rate of an STS-3 signal calculated?
A. By multiplying the frame size of STS-1 by 3
B. By adding the frame size of STS-1 to STS-3
C. By dividing the frame size by 3
D. By subtracting the frame size from STS-1
Correct Answer:
A
Chapter: 200
Q3099:
What determines the number of columns in an STS-n frame?
A. The level n of the signal (e.g., STS-1, STS-3)
B. The size of the signal's data rate
C. The number of frames per second
D. Length of each frame
Correct Answer:
A
Chapter: 200
Q3100:
The frame size of an STS-n signal is determined by _______.
A. The number of frames in the signal
B. The level of the signal (n) and its frame structure
C. The number of sections in the signal
D. The bytes per column and rows in the frame
Correct Answer:
B