CCNA 1 Chapter 3: Networking Media Transmission
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Questions and Answers

What type of cable should be used to connect a PC to a switch?

  • Straight-through cable (correct)
  • Fiber-optic cable
  • Rollover cable
  • Crossover cable

    • Which devices use pins 1 and 2 to transmit data?

  • PCs (correct)
  • Bridges
  • Hubs
  • Switches

    • What type of light is typically used in fiber-optic cabling?

  • Blue light
  • Ultraviolet light
  • Infrared light (correct)
  • Red light

    • Why should you not look into an end of a fiber optic cable that is connected to a device?

    <p>Risk of eye damage</p> Signup and view all the answers

    When should a crossover cable be used for connection?

    <p>When connecting two devices with different transmit pins</p> Signup and view all the answers

    Which of the following is an accurate statement about digital transmission?

    <p>All of the above are accurate ways digital transmission can be achieved.</p> Signup and view all the answers

    What is the primary difference between shielded twisted-pair (STP) and unshielded twisted-pair (UTP) cable?

    <p>STP cable includes an additional shielding layer around the twisted pairs, while UTP cable does not.</p> Signup and view all the answers

    Which of the following statements about copper media is accurate?

    <p>Copper media requires an introductory knowledge of physics or chemistry to understand the basics of electricity.</p> Signup and view all the answers

    What is the primary advantage of using UTP cable over STP cable?

    <p>UTP cable is more flexible and easier to route than STP cable.</p> Signup and view all the answers

    What is the purpose of the twisted-pair design in UTP and STP cables?

    <p>To reduce electromagnetic interference (EMI) and crosstalk between the pairs.</p> Signup and view all the answers

    Which of the following best describes the three main types of electrical materials mentioned in the text?

    <p>Insulators, conductors, and semiconductors are classified based on the force required to move their electrons from orbit.</p> Signup and view all the answers

    Which organization(s) define(s) the standards for commercial building telecommunication cabling, including rules for using unshielded twisted-pair cabling and connector pin assignments?

    <p>The Telecommunications Industry Association (TIA) and the Electronic Industries Alliance (EIA)</p> Signup and view all the answers

    What is the primary purpose of the shielding in STP cable?

    <p>To reduce electromagnetic interference (EMI) and crosstalk between the pairs.</p> Signup and view all the answers

    Which organization is responsible for defining LAN standards such as the 802.3 standard used for Ethernet?

    <p>The Institute of Electrical and Electronic Engineers (IEEE)</p> Signup and view all the answers

    What is the key difference between the pinout used for a straight-through Ethernet cable and the pinout used for a crossover Ethernet cable?

    <p>The order of the wire pairs is reversed in the crossover cable.</p> Signup and view all the answers

    What is the main advantage of coaxial cable over twisted-pair cable?

    <p>Coaxial cable can transmit data over longer distances without the need for repeaters.</p> Signup and view all the answers

    What is one of the points of comparison for networking cable?

    <p>The data transmission speeds that can be achieved</p> Signup and view all the answers

    What is the primary function of the braided copper shielding in a coaxial cable?

    <p>To reduce electromagnetic interference (EMI) and crosstalk between the cable components.</p> Signup and view all the answers

    What is the purpose of the pair shield in STP cable?

    <p>To reduce electromagnetic interference (EMI) and crosstalk between the individual wire pairs.</p> Signup and view all the answers

    What is the primary advantage of using a crossover cable instead of a straight-through cable to connect two similar devices, such as two PCs with NICs?

    <p>The crossover cable allows the devices to communicate by switching the transmit and receive wire pairs.</p> Signup and view all the answers

    What is the purpose of the overall shield in STP cable?

    <p>To reduce electromagnetic interference (EMI) and crosstalk between all the wire pairs in the cable.</p> Signup and view all the answers

    Which component of an optical fiber cable reflects light back into the core?

    <p>The cladding</p> Signup and view all the answers

    What is the primary advantage of single-mode fiber over multimode fiber?

    <p>Both higher data rates and longer distances</p> Signup and view all the answers

    What is the minimum number of devices required to set up a wireless LAN (WLAN)?

    <p>2</p> Signup and view all the answers

    Which IEEE standard for wireless networking operates in the 5 GHz frequency band?

    <p>802.11a</p> Signup and view all the answers

    What is the primary function of the buffer in an optical fiber cable?

    <p>To provide protection and strength</p> Signup and view all the answers

    In a WLAN infrastructure mode, what device is typically used as a central hub?

    <p>An access point (AP)</p> Signup and view all the answers

    Which of the following statements about fiber-optic cabling is true?

    <p>Fiber-optic cabling is more secure because it is difficult to tap into the optical signals.</p> Signup and view all the answers

    What is the raw material used to manufacture fiber-optic cables?

    <p>Sand</p> Signup and view all the answers

    Which of the following is NOT a component of a fiber-optic cable?

    <p>Insulation</p> Signup and view all the answers

    What is the primary difference between single-mode and multimode fiber-optic cables?

    <p>Single-mode cables support longer transmission distances than multimode cables.</p> Signup and view all the answers

    Which of the following is NOT a characteristic of wireless media?

    <p>Wireless media requires a conductor like a copper wire.</p> Signup and view all the answers

    In a typical enterprise WLAN design, what is the role of an access point (AP)?

    <p>To provide wireless connectivity to end-user devices.</p> Signup and view all the answers

    What is the purpose of the Service Set Identifier (SSID) in a WLAN?

    <p>To identify the wireless network and allow devices to associate with it.</p> Signup and view all the answers

    Which of the following is NOT one of the physical layer transmission options defined by the 802.11 standard for WLANs?

    <p>Time Division Multiple Access (TDMA)</p> Signup and view all the answers

    Which of the following statements about copper cabling is true?

    <p>Copper cabling carries information using electrical current.</p> Signup and view all the answers

    What is the purpose of a crossover cable in a network?

    <p>To connect two switches or similar devices.</p> Signup and view all the answers

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