Podcast
Questions and Answers
Which type of cable is most suitable for connecting two routers directly, enabling data transmission by reversing the transmission and receiving pins?
Which type of cable is most suitable for connecting two routers directly, enabling data transmission by reversing the transmission and receiving pins?
- Crossover (correct)
- Straight Through
- Coaxial
- Rollover
In a noisy environment where electromagnetic interference is a concern, which type of twisted pair cable is most appropriate?
In a noisy environment where electromagnetic interference is a concern, which type of twisted pair cable is most appropriate?
- Straight Through
- Rollover
- Unshielded Twisted Pair (UTP)
- Shielded Twisted Pair (STP) (correct)
For connecting a computer terminal to a router's console port for initial configuration, which type of cable is typically used?
For connecting a computer terminal to a router's console port for initial configuration, which type of cable is typically used?
- Fiber Optic
- Crossover
- Rollover (correct)
- Straight Through
Which characteristic of single-mode fiber optic cable allows it to transmit data over longer distances compared to multi-mode fiber?
Which characteristic of single-mode fiber optic cable allows it to transmit data over longer distances compared to multi-mode fiber?
When designing a computer network for a large office building, which factor directly influences the choice between wired and wireless solutions?
When designing a computer network for a large office building, which factor directly influences the choice between wired and wireless solutions?
Which transmission medium is most susceptible to electromagnetic interference (EMI)?
Which transmission medium is most susceptible to electromagnetic interference (EMI)?
In network design, what is the primary function of a conductive shield in coaxial cables?
In network design, what is the primary function of a conductive shield in coaxial cables?
If a network requires high bandwidth and the ability to transmit data over very long distances, which type of cable would be the MOST suitable choice?
If a network requires high bandwidth and the ability to transmit data over very long distances, which type of cable would be the MOST suitable choice?
What is a key difference in the physical structure between single-mode and multi-mode fiber optic cables that affects their performance?
What is a key difference in the physical structure between single-mode and multi-mode fiber optic cables that affects their performance?
Which of the following considerations is MOST important when planning the physical layout of a network in terms of potential future needs?
Which of the following considerations is MOST important when planning the physical layout of a network in terms of potential future needs?
Flashcards
Transmission Medium
Transmission Medium
The physical pathway a message takes from sender to receiver.
Coaxial Cable
Coaxial Cable
A cable using a single conductor in the middle, surrounded by an insulator (dielectric) and a conductive shield.
Twisted Pair Cable
Twisted Pair Cable
Cable wires twisted together to improve electromagnetic compatibility; can be shielded or unshielded.
Unshielded Twisted Pair (UTP)
Unshielded Twisted Pair (UTP)
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Shielded Twisted Pair (STP)
Shielded Twisted Pair (STP)
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Fiber Optic Cable
Fiber Optic Cable
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Single-Mode Fiber
Single-Mode Fiber
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Multi-Mode Fiber
Multi-Mode Fiber
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Straight Through Cable
Straight Through Cable
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Crossover Cable
Crossover Cable
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Study Notes
- Transmission medium refers to the physical pathway a message uses to travel from a sender to a receiver.
Coaxial Cable
- Uses a single conductor in the center of the cable.
- Includes a central conductor surrounded by a dielectric insulator.
- Features a conductive shield around the dielectric, acting as the second conductor and protecting against interference.
Twisted Pair Cable
Unshielded Twisted Pair (UTP) Cabling
- Involves wires twisted together.
- Comparatively high noise levels.
- Does not require grounding.
- Slower data rates.
- Lower cost and requires less maintenance.
- Improves electromagnetic compatibility by twisting two conductors of a single circuit together.
- Classified by intrinsic impedance and whether it is shielded or unshielded.
Shielded Twisted Pair (STP) Cabling
- Enclosed in foil for less susceptibility to noise and crosstalk.
- Requires grounding.
- Offers high data rates.
- Moderately expensive.
Fiber Optic Cable
- Made of thin glass or plastic strands called fiber optics.
- Sends data via light.
- A bundle of optical fibers provides high bandwidth for sending data over long distances.
Single-Mode Fiber
- Allows light signals to travel straight through the fiber without bouncing due to its small core.
Multi-Mode Fiber
- Has a core with a diameter 5-10 times larger than single-mode fiber.
- Allows multiple light signals to pass through simultaneously.
- Limits the distance signals can be transferred.
Cable Types
Straight Through Cable
- Used in local area networks to connect a computer to a network hub, such as a router.
- Most commonly connects a host to a client.
- Wiring sequence: white orange, orange, white green, blue, white blue, green, white brown, brown.
Crossover Cable
- Used to interconnect two similar devices.
- Reverses the transmission and receiving pins at both ends.
- Enables output from one computer to become input to another.
- Most commonly used to connect same devices.
- RJ45 pin 1: white green, green, white orange, blue, white blue, orange, white brown, brown.
- RJ45 pin 2: white orange, orange, white green, blue, white blue, orange, white brown, brown.
Rollover Cable
- A type of null-modem cable used to connect a computer terminal to a router’s console port.
- RJ45 pin 1: white orange, orange, white green, blue, white blue, green, white brown, brown.
Considerations for Computer Network Design
- Budget and cost.
- Location.
- Bandwidth.
- Security.
- Backup.
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