Free Essay

Data

In: Computers and Technology

Submitted By Bornslippynuxx
Words 806
Pages 4
William Wragg
Mr. Thomas Fortenberry
IST 113471
17 October 2014

Chapter 7 Exercises 1. What is the definition of a local area network? a. A communication network that interconnects a variety of data communicating devices within a small geographic area and broadcasts data at high data transfer rates with very low error rates. 2. List the primary activities and application areas of local area network. b. File server, print server, connections to other networks. 3. List the advantages and disadvantages of local area networks. c. The advantages are sharing of files and devices, and intercommunication. d. The disadvantages are maintenance, complexity, and costs. 4. What are the basic layouts of local area networks? List two advantages that each layout has over the others. e. Buses advantages are the use of low-noise coaxial cable, and inexpensive taps. f. Star-wired buses are simple to interconnect, have easy to add components, and are most popular. g. Star-wired rings are simple to interconnect and have easy to add components. 5. What is meant by a passive device? h. A signal that enters is neither amplified nor regenerated. The signal is simply passed on. 6. What is meant by a bidirectional signal? i. A signal that propagates in either direction on a medium. 7. What are the primary differences between baseband technology and broadband technology? j. Baseband is a digital signal, where broadband is analog and can carry many signals. 8. What purpose does a hub serve? k. The hub is a collection point for workstations. 9. What is the difference between a physical design and a logical design? l. Physical is the wiring and components. Logical is how the software passes the data. 10. What is a medium access control protocol? m. The software that allows a workstation to insert its data onto the LAN 11. What are the basic operating principles behind CSMA/CD? n. CSMA/CD: Listen to medium; if no one transmitting, transmit. Continue to listen for collisions. If someone is transmitting, wait. 12. What is meant by a “nondeterministic” protocol? o. You cannot determine precisely when a workstation will get a chance to transmit due to potential collisions.

13. What does the term 100BaseT stand for? p. One hundred mega-bits per second transmission over digital signals, using twisted pair wiring. 14. What is the difference between Fast Ethernet and regular Ethernet? q. Fast Ethernet transmits at 100 Mbps, while regular Ethernet transmits at 10 Mbps. 15. What are the latest 10-Gbps Ethernet standards? r. 10GBase-fiber, 10GBase-T, 10GBase-CS. 16. What is the primary advantage of power over Ethernet? The primary disadvantage? s. The primary advantage is not having to run a separate power line to power the device. t. The disadvantage is making sure the switch has enough power to run PoE devices. 17. How does a transparent switch work? u. Through a process called backwards learning the switches learn where workstations are and then use that information for future forwarding decisions. 18. What is the purpose of a virtual LAN? v. To setup a network within a network with different rules, bandwidth optimization, and network security.

19. How does a switch encapsulate a message for transmission? w. The switch looks at NIC/MAC addresses and forwards accordingly. 20. When referring to a hub or a switch, what is a port? x. The port is the connection that is used to connect a workstation or another hub or switch to this hub or switch. 21. What are the basic functions of a switch? y. A switch examines a packet’s destination address and routes the packet to the appropriate workstation. 22. How does a switch differ from a hub? z. A switch examines addresses. A hub does not. 23. What is cut-through architecture? {. The device is passing the data packet on before it has even finished entering the device. 24. How is a full-duplex switch different from a half-duplex switch? |. Transmits on two pairs of wires, and sends and receives on two different signals. 25. What is meant by link aggregation? }. The combining of two or more data paths, or links, into one higher-speed link.

Thinking outside the Box #5
After the latest round of corporate reorganizations, you now have six internal divisions instead of seven. The technology department tries to organize the network layout by keeping users in each division on their own segment of the network, but it is getting tired of rearranging the wire in the closets to accommodate these changes. What might you suggest that the technology department use instead to support the six internal divisions? a. I would suggest they implement Virtual Networks for some of the less concrete divisions and use that as a way to not have to move wiring every time to accommodate changes within the corporation.

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