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Questions and Answers
What is the primary purpose of twisting pairs of wires in twisted pair cable?
Which type of twisted pair cable is ideal for environments with significant electromagnetic interference?
Which of the following is NOT a common source of electromagnetic interference (EMI)?
What is a disadvantage of using UTP (Unshielded Twisted Pair) in a network?
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What are the potential effects of electromagnetic interference (EMI) on twisted pair cable communications?
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Which statement accurately describes the cost difference between UTP and STP?
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Which of the following describes a characteristic of STP (Shielded Twisted Pair)?
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Which of the following is a potential consequence of reduced bandwidth in a network?
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What is the maximum cable length for a segment using 10Base2 (ThinNet)?
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Which connector type is used for 10Base2 connections?
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What type of topology is used in both 10Base2 and 10Base5 standards?
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Which type of coaxial cable has a higher difficulty in installation?
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How many devices can be connected to a segment using 10Base5?
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What is the transmission speed of both 10Base2 and 10Base5?
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Which term best describes the coaxial cable primarily used for cable television?
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What is the primary usage context for 10Base2 and 10Base5 cables?
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Which type of fiber optic cable is suitable for high-bandwidth, long-distance applications?
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What is a primary disadvantage of fiber optic cables compared to standard electrical cables?
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In which environment do multimode fibers perform best?
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Which of the following statements about Single-mode Fiber (SMF) is accurate?
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What is a key characteristic of Multimode Fiber (MMF)?
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How does the bandwidth of standard electrical cables generally compare to fiber optic cables?
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What is a common feature of fiber optic cables in terms of distance effectiveness?
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What type of light source is typically used by Single-mode Fiber (SMF)?
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What is the typical core diameter of fiber optic cabling?
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What maximum effective distance typically characterizes fiber optic cabling?
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Which light source is commonly used in fiber optic technology?
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Which type of cabling is primarily associated with data communication and is known for its high bandwidth?
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What is a significant limitation of twisted pair cabling?
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Which component is standardized as the common interface for Ethernet networking?
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What type of signal can coaxial cabling NOT effectively transmit due to electromagnetic interference (EMI)?
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Which of these is NOT a benefit of fiber optic cabling?
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Study Notes
Twisted Pair Cable
- Used for phone communications and Ethernet networks.
- Consists of pairs of conductors twisted together to cancel electromagnetic interference (EMI).
Electromagnetic Interference (EMI)
- Refers to disturbances from external electromagnetic fields impacting signal transmission.
- Common sources include electrical devices, radio frequency devices, and microwave ovens.
Effects of EMI on Twisted Pair Cable
- Causes signal degradation or complete signal loss.
- Results in data transmission errors such as packet loss and weak network performance.
- Reduces bandwidth, leading to slower transmission speeds.
Types of Twisted Pair Cable
-
Unshielded Twisted Pair (UTP)
- Primarily used in low-interference environments like home networks.
- Lacks additional shielding, making it cost-effective and flexible.
- General usage involves lower bandwidth and shorter distances.
-
Shielded Twisted Pair (STP)
- Designed for environments with higher electromagnetic interference (EMI).
- Includes shielding (foil or mesh) for better protection against interference.
- More expensive and less flexible than UTP, with higher bandwidth capacity.
Fiber Optic Cable
-
Transmits data using light, suitable for high-speed and long-distance communication.
-
Single-mode Fiber (SMF)
- Designed for long distances; carries a single light path.
- Typical applications include telecommunications and internet backbones.
- Small core diameter (8-10 microns) allows data transmission up to 60-100 km with minimal signal loss.
-
Multimode Fiber (MMF)
- Facilitated for shorter-distance communication.
- Larger core diameter (50-62.5 microns) supports multiple light paths.
- Effective up to 2 km; uses LED or lasers for light source.
Network Transmission Media
- Media over which electrical signals travel, categorized as:
- Wired/GUIDED (Cables)
- Wireless/UNGUIDED
Coaxial Cable
- Used for transmitting audio, video, and communication signals.
- Common in cable TV and broadband networks, categorized as:
-
Thicknet (10Base5)
- Speed: 10 Mbps; maximum length: 500 meters; supports up to 100 devices.
-
Thinnet (10Base2)
- Speed: 10 Mbps; maximum length: 185 meters; supports up to 30 devices.
-
Comparison of Transmission Media
-
Fiber Optic Cable
- Bandwidth: < 10 GHz; immunity to EMI; most expensive.
-
Twisted Pair Cable
- Bandwidth: < 100 MHz; low-cost option; affected by EMI.
-
Coaxial Cable
- Bandwidth: < 1GHz; relatively inexpensive; can be affected by EMI.
RJ45 Connectors
- Standardized connector for Ethernet networking; features an 8-pin/8-position interface.
Quiz Questions
- Identify types of transmission media in wired LAN.
- Name the two types of coaxial cables.
- Describe the medium in optical fibers.
- Recognize which cable is used for cable TV connections.
- Determine which supports data rate up to 100 Mbps (Gigabit Ethernet).
- Discuss the types of cables in twisted pair.
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Description
This quiz covers the fundamentals of twisted pair cables, focusing on their structure, types, and the effects of electromagnetic interference (EMI) on communication. Learn about unshielded and shielded twisted pair cables and their applications in networking environments. Test your knowledge on signal degradation caused by EMI and the implications for data transmission.
