Podcast
Questions and Answers
What is the primary function of the braided metal shield in a coaxial cable?
What is the primary function of the braided metal shield in a coaxial cable?
- To increase the speed of data transmission.
- To provide structural support to the cable.
- To shield transmissions from electromagnetic interference (EMI). (correct)
- To insulate the central conductor.
Which characteristic is shared by the center wire and braided shield in a coaxial cable?
Which characteristic is shared by the center wire and braided shield in a coaxial cable?
- They are both connected to the outer jacket.
- They share a common axis or centerline. (correct)
- They both directly transmit data signals.
- They are both made of insulating material.
Which type of connector, commonly used in older networks with coaxial cables, pierces the cable to make a connection?
Which type of connector, commonly used in older networks with coaxial cables, pierces the cable to make a connection?
- BNC connector
- Vampire tap (correct)
- RJ-45 connector
- F-connector
Which type of connector is typically used to establish a secure, screw-on connection for cable modems?
Which type of connector is typically used to establish a secure, screw-on connection for cable modems?
What is the primary significance of the Ohm rating in Radio Grade (RG) coaxial cables?
What is the primary significance of the Ohm rating in Radio Grade (RG) coaxial cables?
What is the main purpose of twisting the pairs of cables in twisted pair cabling?
What is the main purpose of twisting the pairs of cables in twisted pair cabling?
In what situation is Shielded Twisted Pair (STP) cabling most commonly used?
In what situation is Shielded Twisted Pair (STP) cabling most commonly used?
What is a primary advantage of using Unshielded Twisted Pair (UTP) cabling compared to STP cabling?
What is a primary advantage of using Unshielded Twisted Pair (UTP) cabling compared to STP cabling?
What is the purpose of CAT ratings for UTP cables?
What is the purpose of CAT ratings for UTP cables?
Which statement accurately describes the relationship between frequency and data transmission in network cables?
Which statement accurately describes the relationship between frequency and data transmission in network cables?
If a network requires a cable that can support data transfer rates of up to 1 Gbps, which CAT rating would be most suitable?
If a network requires a cable that can support data transfer rates of up to 1 Gbps, which CAT rating would be most suitable?
What is the primary difference between an RJ-11 connector and an RJ-45 connector?
What is the primary difference between an RJ-11 connector and an RJ-45 connector?
What is the main advantage of using fiber-optic cables over copper cables in network installations?
What is the main advantage of using fiber-optic cables over copper cables in network installations?
What are the core and cladding measurements, $62.5/125 \mu m$, referring to in fiber-optic cables?
What are the core and cladding measurements, $62.5/125 \mu m$, referring to in fiber-optic cables?
Which statement accurately describes the use of fibers in most network technologies using fiber optic cable?
Which statement accurately describes the use of fibers in most network technologies using fiber optic cable?
What is the primary difference between multimode fiber (MMF) and single-mode fiber (SMF)?
What is the primary difference between multimode fiber (MMF) and single-mode fiber (SMF)?
Which wavelength is most commonly transmitted by multimode fiber optic cables?
Which wavelength is most commonly transmitted by multimode fiber optic cables?
Which wavelengths are transmitted by Single-mode fiber optic cables?
Which wavelengths are transmitted by Single-mode fiber optic cables?
Which of the following fiber-optic connectors is always duplex?
Which of the following fiber-optic connectors is always duplex?
What is a key characteristic of the classic serial cable using the RS-232 standard?
What is a key characteristic of the classic serial cable using the RS-232 standard?
What is the most common type of connector used for serial ports?
What is the most common type of connector used for serial ports?
What data transfer rate is most commonly associated with parallel ports?
What data transfer rate is most commonly associated with parallel ports?
What is the primary hazard associated with Polyvinyl Chloride (PVC) rated cabling in the event of a fire?
What is the primary hazard associated with Polyvinyl Chloride (PVC) rated cabling in the event of a fire?
Which statement best describes the characteristics of plenum-rated cable?
Which statement best describes the characteristics of plenum-rated cable?
How does riser-rated cable compare to plenum-rated cable in terms of fire protection?
How does riser-rated cable compare to plenum-rated cable in terms of fire protection?
Where is riser-rated cable most appropriate for use?
Where is riser-rated cable most appropriate for use?
What is the primary purpose of the Institute of Electrical and Electronics Engineers (IEEE) in the context of networking?
What is the primary purpose of the Institute of Electrical and Electronics Engineers (IEEE) in the context of networking?
When did the IEEE 802 Working Group begin its work?
When did the IEEE 802 Working Group begin its work?
What does the IEEE 802 Working Group primarily define in the context of networking standards?
What does the IEEE 802 Working Group primarily define in the context of networking standards?
What is the primary focus of the IEEE 1284 committee?
What is the primary focus of the IEEE 1284 committee?
Which area of networking is addressed by the IEEE 802.11 standard?
Which area of networking is addressed by the IEEE 802.11 standard?
Which networking technology is standardized by the IEEE 802.3 subcommittees?
Which networking technology is standardized by the IEEE 802.3 subcommittees?
What type of network is covered by the IEEE 802.15 standard?
What type of network is covered by the IEEE 802.15 standard?
If installing network cables in a building with strict fire safety codes, requiring materials that produce minimal smoke and fumes, which cable type should be used?
If installing network cables in a building with strict fire safety codes, requiring materials that produce minimal smoke and fumes, which cable type should be used?
To ensure that Ethernet cables can support data transfer up to 10 Gbps over a significant distance, while also taking into account future network demands, what cable category should be installed?
To ensure that Ethernet cables can support data transfer up to 10 Gbps over a significant distance, while also taking into account future network demands, what cable category should be installed?
A technician needs to connect a cable modem to a wall outlet. Which type of connector is most appropriate for this task?
A technician needs to connect a cable modem to a wall outlet. Which type of connector is most appropriate for this task?
In a high-interference environment, such as a manufacturing plant with heavy machinery, which type of cabling is most suitable to minimize electromagnetic interference (EMI)?
In a high-interference environment, such as a manufacturing plant with heavy machinery, which type of cabling is most suitable to minimize electromagnetic interference (EMI)?
For a network that requires long-distance data transmission without signal degradation due to electromagnetic interference, what cabling solution should be implemented?
For a network that requires long-distance data transmission without signal degradation due to electromagnetic interference, what cabling solution should be implemented?
An older office building needs a network upgrade, but the existing cable conduits are very narrow. What type of Ethernet cable would be the best option to use?
An older office building needs a network upgrade, but the existing cable conduits are very narrow. What type of Ethernet cable would be the best option to use?
Flashcards
Coaxial cable
Coaxial cable
Cable with a central conductor wire, insulating material, and a braided metal shield; it protects transmissions from EMI.
BNC Connector
BNC Connector
A bayonet-style connector used in older coaxial cable networks.
F-connector
F-connector
A connector that screws on to provide a secure connection for cable modems.
Radio Grade (RG) Ratings
Radio Grade (RG) Ratings
Signup and view all the flashcards
Twisted Pair Cable
Twisted Pair Cable
Signup and view all the flashcards
Shielded Twisted Pair (STP)
Shielded Twisted Pair (STP)
Signup and view all the flashcards
Unshielded Twisted Pair (UTP)
Unshielded Twisted Pair (UTP)
Signup and view all the flashcards
Category (CAT) Ratings
Category (CAT) Ratings
Signup and view all the flashcards
Bandwidth
Bandwidth
Signup and view all the flashcards
RJ-11
RJ-11
Signup and view all the flashcards
RJ-45
RJ-45
Signup and view all the flashcards
Fiber-Optic Cable
Fiber-Optic Cable
Signup and view all the flashcards
Fiber Optic Core
Fiber Optic Core
Signup and view all the flashcards
Cladding
Cladding
Signup and view all the flashcards
Fiber-optic cable size
Fiber-optic cable size
Signup and view all the flashcards
Multimode fiber (MMF)
Multimode fiber (MMF)
Signup and view all the flashcards
Single-mode fiber (SMF)
Single-mode fiber (SMF)
Signup and view all the flashcards
Wavelengths
Wavelengths
Signup and view all the flashcards
ST and SC Connectors
ST and SC Connectors
Signup and view all the flashcards
LC Connector
LC Connector
Signup and view all the flashcards
Classic Serial Cable
Classic Serial Cable
Signup and view all the flashcards
Parallel Connectors
Parallel Connectors
Signup and view all the flashcards
Polyvinyl chloride (PVC)
Polyvinyl chloride (PVC)
Signup and view all the flashcards
Plenum-rated cable
Plenum-rated cable
Signup and view all the flashcards
Riser-rated cable
Riser-rated cable
Signup and view all the flashcards
IEEE
IEEE
Signup and view all the flashcards
Study Notes
Coaxial Cable
- Coaxial, or coax, contains a central conductor wire, usually copper.
- An insulating material surrounds the conductor.
- This is surrounded by a braided metal shield.
- The center wire and braided shield share a common axis or centerline.
- Coaxial cable shields transmissions from electromagnetic interference (EMI).
Coaxial Connectors
- Bayonet-style BNC connectors are used in older networks
- Vampire taps pierced the cable.
- F-connectors screw on and make a secure connection for cable modems.
Radio Grade (RG) Ratings
- Developed by the U.S. military.
- Ohm rating is the only important measure.
- RG-6 and RG-59 cables are rated at 75 ohms.
Twisted Pair
- It stands as the most common network cabling.
- Twisted pairs of cables are bundled together.
- Twists reduce crosstalk interference.
- There are two types: shielded twisted pair and unshielded twisted pair.
Shielded Twisted Pair
- Shielding protects from electromagnetic interference (EMI).
- Shielding needed in locations with excessive electronic noise.
- The most common is IBM Type 1 cable.
Unshielded Twisted Pair
- It is the most common twisted pair.
- The twisted pairs of wires have a plastic jacket.
- It is cheaper than STP.
- It can be used in telephone systems.
Category (CAT) Ratings
- UTP has a variety of variations, for example number of twists per foot.
- CAT ratings help installers choose the right cable for the right network technology.
- CAT ratings are rated in MHz, indicating the highest frequency cable handle
Bandwidth
- Bandwidth is the maximum amount of data that will go through a cable per second.
- 10 MHz originally translated to 10 Mbps.
- Current networks use bandwidth-efficient encoding schemes.
- The Cat 5e cable can handle throughput of up to 1000 Mbps. New cables include: Cat 6, Cat 6a, and Cat 7.
Registered Jack (RJ) Connectors
- RJ-11s contain two pairs of wires used for telephones.
- RJ-45s contain four pairs of wires used for networks.
Fiber-Optic Cable
- Fiber-Optic cabling Transmits light rather than electricity
- Fiber-Optic cabling is Not affected by EMI
- Fiber-Optic cabling is excellent for long-distance transmissions.
- A single copper cable works up to a few hundred meters, while a single fiber-optic cable works up to tens of kilometers.
- Core: a glass fiber.
- Cladding: reflects signal down the fiber.
- Buffer material gives strength.
- An insulating jacket protects inner components.
- A two-number designator used is core and cladding measurements.
- The most common fiber-optic cable size: 62.5/125 μm.
- Almost all network technologies use fiber optic cable with pairs of fibers.
- One fiber used for sending.
- One fiber for receiving.
Types of Fiber-Optic Cabling
- Multimode fiber (MMF) uses light emitting diodes (LEDs).
- Single-mode fiber (SMF) prevents modal distortion because signals sent at the same time do not arrive at the same time because path lengths vary slightly.
- Fiber optic wavelengths are measured in nm.
- Almost all multimode cables transmit 850-nm wavelengths.
- Single-mode transmits either 1310 or 1550 nm, depending on the laser.
Connector Types
- ST and SC have unique ends.
- LC is always duplex.
Other Cables
- Classic serial adheres to the RS-232 recommended standard dated from 1969 that has not changed significantly in 40 years.
- The most common serial port is 9-pin, male D-subminiature (DB-9) connector.
- Classic serial cables have slow data rates of about 56,000 bps and only point-to-point connections.
Parallel Connectors
- Parallel connectors as ancient as serial ports.
- Parallel connectors can run up to 2 Mbps, but tend to be much slower when used for networking.
- Parallel connections use 25-pin female DB type connector.
Fire Ratings
- Developed by Underwriters Laboratories and the National Electrical Code (NEC).
- Polyvinyl chloride (PVC) rating offers no significant fire protection and creates lots of smoke and noxious fumes.
- Plenum-rated cable creates less smoke and fumes. It costs three to five times as much as PVC-rated cable. Most city ordinances require plenum cable for network installations.
- Riser-rated cable is the proper cable to use for vertical runs between floors of a building. Riser provides less protection than plenum cable, but most installations today use plenum for runs between floors.
Networking Industry Standards – IEEE
- Institute of Electrical and Electronics Engineers (IEEE) defines standards for use and implementation of technology.
- IEEE 802 Working Group
- Began in February 1980.
- Defines frames, speed, distances, and types of cabling for networks.
- IEEE 1284 committee sets standards for parallel communications.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Related Documents
Description
This lesson covers coaxial cables, their connectors like BNC and F-connectors, and Radio Grade (RG) ratings. It also explores twisted pair cabling, including shielded and unshielded types, and how twists reduce crosstalk interference in network transmissions.
