Title: Communication Cable Examination Paper
This examination paper focuses on the analysis of communication cables, with a specific emphasis on their physical characteristics, modes of transmission, and performance standards. The paper covers both single-mode and multi-mode fibers, exploring their respective advantages and disadvantages in terms of bandwidth, signal quality, and cost. It also delves into the different types of cables used in modern communication systems, including coaxial, twisted-pair, and optical fibers. The examination paper concludes by summarizing the key considerations for selecting appropriate communication cables in different scenarios and applications.
In today's world of advanced technology, communication cables play a crucial role in the transmission of data and information. This examination paper aims to assess your knowledge and understanding of communication cables, including their types, functions, and applications.
Part 1: Multiple Choice Questions (MCQs)
1、What is a communication cable?
a) A wire used to transmit electrical signals
b) A fiber-optic cable used to transmit light signals
c) A bundle of wires used to transmit data and voice signals
d) All of the above
2、What is the difference between coaxial and twisted-pair cables?
a) Coaxial cables have a single wire, while twisted-pair cables have two wires twisted together.
b) Coaxial cables are more expensive than twisted-pair cables.
c) Twisted-pair cables offer higher bandwidth than coaxial cables.
d) Coaxial cables are better suited for outdoor use than twisted-pair cables.
3、What is the function of a repeater in a communication cable system?
a) To amplify the signal to increase its strength
b) To convert the signal from one frequency to another
c) To divide the signal into multiple paths
d) To store the signal temporarily for later use
4、What is the maximum recommended distance between two network devices when using a category 5 twisted-pair cable?
a) 50 meters
b) 100 meters
c) 150 meters
d) 200 meters
5、What is the advantage of using fiber-optic cables over copper cables for long-distance communication?
a) Fiber-optic cables are cheaper than copper cables.
b) Fiber-optic cables have a higher bandwidth than copper cables.
c) Copper cables require more maintenance than fiber-optic cables.
d) Fiber-optic cables are not affected by electromagnetic interference.
Part 2: Fill in the Blanks
1、_________ is a type of communication cable that consists of two or more wires twisted together for the purpose of reducing _________ and increasing _________.
2、A _________ is a device that converts the signal from one form to another, such as from an electrical signal to an optical signal, and vice versa. It is commonly used in communication cable systems to amplify the signal and increase its _________.
3、The _________ of a communication cable refers to the rate at which data can be transmitted over the cable, and it is measured in units such as _________ per second (bps).
4、A _________ is a type of communication cable that uses light signals instead of electrical signals to transmit data over long distances. They are commonly used in telephone and internet cables due to their high _________ and low _________.
Part 3: Short Answer Questions (SAQs)
1、Describe the role of a bridge in a communication cable network, and explain how it differs from a repeater. (Answer: A bridge acts as a packet switch, filtering and forwarding data between different network segments, while a repeater simply amplifies the signal to increase its range.)
2、Explain the advantages of using fiber-optic cables over copper cables for short-distance communication. (Answer: Fiber-optic cables offer higher bandwidth, lower electromagnetic interference, and better signal quality than copper cables, making them ideal for short-distance communication.)
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