Data Communications Networking Devices - 4th Ed.pdf

REVIEW QUESTIONS ______________________________________________________________ 3473.1.2 Discuss four reasons that can justify the use of a LAN.3.2.1 Describe the advantages and disadvantages associated with ®ve LAN topologies.3.2.2 Discuss the effect of a cable break on a star, bus, and ring-based LAN.3.2.3 What is the difference between broadband and baseband signaling?3.2.4 Discuss the rationale for using Manchester or Differential Manchester coding forLAN signaling.3.2.5 What is the purpose of placing twists in a pair of wires?3.2.6 What is the relationship between the American Wire Gauge AWG) of a wire and itsresistance?3.2.7 What is the relationship between cabling distance and AWG values?3.2.8 What is the total length of horizontal cabling permitted under the EIA/TIA-568standard?3.2.9 If a signal with transmitted voltage of 1000 mW is received at a voltage of 10 mW, whatis the attenuation on the circuit path?3.2.10 What is the general relationship between signal power loss and attenuation?3.2.11 Which has a greater effect upon communicationsÐnear or far end crosstalk?Why?3.2.12 What is the key function performed by a headend on a broadband network?3.2.13 Compare and contrast CSMA/CD and token-passing access methods.3.2.14 How can a collision occur on a CSMA/CD network?3.2.15 How is the state of a communications channel active or idle) determined onbroadband and baseband networks?3.3.1 What is an advantage associated with the subdivision of the data link layer by theIEEE?3.3.2 Why did the IEEE subdivide the physical layer for certain types of LANs?3.4.1 What are the two types of coaxial cable used to construct Ethernet networks? What arethe advantages and disadvantages associated with the use of each type of cable?3.4.2 What is the purpose of a jam signal?3.4.3 What are the key functions performed by an Ethernet transceiver?3.4.4 What is a 10BASE-5 network?