Complete A-1: Describing networking models and protocols, questions 1, 2 and 3 on page 1-7. (6 points)

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1 COT410 LAN Fundamentals Week 1 Worksheet (WS1) Unit 1 / Unit 2 Assignments Name: _Kevin Comer Unit 1 Network Basics Topic A: Network Concepts Complete A-1: Describing networking models and protocols, questions 1, 2 and 3 on page 1-7. (6 points) The difference is that the Peer to Peer model can provide network resources to other 1. hosts or access resources located on other hosts and Client/Server model hosts have specific roles. A company would want to implement a client/server network to better use resources and 2. save money over time, they can be expanded, easily supported through centralized services and easy to back-up. 3. A small business company or a home business would implement a peer to peer network Complete A-5: Describing wireless networking, questions 1and 2 on page (4 points) 1. Radio waves and infrared light replaces the wire in wireless communications. 2. Things to consider when determining which wireless technologies are: availability of access, infrastructure costs, WLAN cost, EMI, speed and security. Complete A-6: Comparing network protocols used on Windows clients, questions 1-5 on page (10 points) 1. C- IPX/SPX 2. A- TCP/IP 3. B- NetBEUI 4. 4 major wireless protocols are; WI-FI, Bluetooth, a, WiMAX 5. No, b products are not compatible with a products. Topic B: Network architectures Complete B-1: Describing physical network topologies, questions 1-6 on page (12 points) 1. The Star topology uses a central networking device. 2. The Bus topology has benefits that are simple and is inexpensive to set up. 1 P a g e

2 3. A break in the line of a Bus topology causes a segment to stop. 4. The Mesh is the most faults tolerant and is scalable. 5. In a hybrid network physical topology, you can combine two or more different types of network topologies into one for faster access speed. Point to point has a dedicated connection between two nodes like LAN with WAP to the 6. LAN transmission device and the point to multipoint connections have multiple connections that connect to a single node to multiple nodes like switches and hubs. Complete B-2: Describing Ethernet standards, questions 1-6 on page (12 points) Gigabit Ethernet has the fastest Ethernet standard. 2. Base-X and Base-R Ethernet standards run over fiber optic cables. 3. Most current Ethernet networks use Shielded Twisted Pair (STP) and Unshielded twisted Pair (UTP) cabling. The 10GBASE-ER and 10GBASE-EW specified in the Ethernet standards of 40km as 4. the longest and the 10GBASE-ZR and 10GBASE-ZR has the capability of running 80km but not in specified in standards. 5. Unshielded twisted pair- CAT5, CAT5e, or CAT6 cabling would be used for 1000BASE-T Ethernet networks. The difference between 100BASE-TX and 1000BASE-T is, 100BASE-TX uses twisted 6. pair- CAT 5 or above cabling and requires all four wire pairs and 1000BASE-T uses unshielded pair -CAT5, CAT5e, or CAT6 cabling that runs over two pairs-one pair of twisted wires in each direction. Complete B-4: Discussing WAN bandwidth technologies, questions 1-8 on page (16 points) The difference between a T line and E lines is that a T line (T-carrier) works with a 1. leased digital communication line provided through a common carrier using multiplexing when an E line (E-carrier) is the European equivalent but a digital transmission format devised by ITU. 2. A repeater is needed on a t line every 6000 feet 3. A fractional T1 line is an option for organizations that don t need a full T1 line by leasing some of the channels of a T1 line rather than all 24 channels. 4. Packing switching technology divides data into packets and sends each packet separately. Technology used by the internet. 5. Two packet switching technologies are; personal computers (DTE) and switches (DCE) ATM is a dedicated-connection switching technology that organizes digital data into byte cell units and transmits them over a physical medium using digital signal technology. 7. The benefit of ATM is that it is easily implemented by hardware (rather than software), has faster network processing, faster switching speeds, and used with LANs and WANs. 8. The benefits of MESH topology is that it is highly reliable, efficient in a sense when one 2 P a g e

3 node fails, allows others to continue to work without disruption, network can be easily expanded, you can send the data from one node to many nodes, and it is more secure. Topic C: The OSI Model Complete C-1: Analyzing the OSI model questions 1-6 on page (14 points) 1 Down Datalink 2 Across Physical 2 Down Presentation 3 Across Application 4 Down Session 5 Down Network 6 Across Transport Complete Unit 1 review questions, pages1-56 through 1-63 (88 points) 1. B 23. False 2. A 24. Mesh 3. C 25. POTS/PSTN 4. segments 26. C 5. C 27. D 6. C 28. B,D,E 7. B 29. Bonding 8. A 30. False 9. D 31. A,D 10. Backbone 32. CSMA/CA 11. Composite 33. Token 12. E 34. Relatively short 13. B,C 35. False 14. Filtering 36. F 15. B 37. C 16. D 38. D 17. A 39. B 18. C 40. A 19. B 41. F 20. False 42. D 21. True 43. C 22. Bus 44. A Unit 2 Wired computer-to-computer connections 3 P a g e

4 Complete Unit 2 review questions, pages 2-51 through (46 points) 1. D 13. Plenums 2. B 14. D 3. E,F,G,H 15. False 4. B 16. C 5. Multi-mode 17. B 6. B,D,E 18. DNS 7. C 19. NetBIOS 8. D 20. True 9. A 21. A 10. A,B,C,F 22. False 11. B 23. False 12. B 4 P a g e

5 Case Projects Critical Thinking Case Project 1 (20 points) You are employed as a network consultant at Network Design Consultants. Your company consists of 15 consultants who assist all types of organizations with issues involving network planning, design, installation, and troubleshooting. The company works on national and international projects, depending on the currently active pool of clients. Your present assignment is to help a small advertising firm, Harrison and Associates, to consider their options for designing a network. There are eight people in the firm: seven advertising consultants and one office coordinator. Each person has a computer at her or his desk and every computer has a printer. Harrison and Associates represents a classic small-office situation. Question 1-1: A Preliminary Design Step As a first step in the design process, what information would you gather about Harrison and Associates? Answer: As a first step in the design process, I would need to have a clear idea of the business environment that I would assemble the network in. Primarily I would be looking for the need to connect the computer network together, in such a fashion, in order so that the employees can share resources and ultimately reach the larger global Internet. Setting up a small business computer networks are all about preference. I believe that the business management would need to ultimately decide on the final layout and pick the services needed for the job then it s would be just a matter of hooking everything up and tweaking a few settings here and there. Things that I would consider in the design process are: Design the physical network to determine whether to use a wired vs. wireless network to determine which would be more feasible. Determine the network setup on whether to use Peer-To-Peer or Client-Server. Determine the equipment I would need, In order to create a client-server setup, which I would probably need a server, or at least a server-friendly operating system. Microsoft Windows Server Edition and Linux would be very good for this. Determine what settings I would need because hooking up the network properly is only half the battle. Once hooked up, the server or the computer running the server OS should be pretty straight forward to configure. To ensure all of the client computers have different computer names. Plan on securing the new network because security is an important factor to consider when running a small business, especially in a wireless configuration. Question 1-2: Creating a Report about Network Topologies (10 points) to help prepare the way for the design you plan to suggest, discuss with the firm s management the concept of network topology and the different types of topologies available. Answer: 5 P a g e

6 As a small advertising firm, Harrison and Associates, represents the classic small-office situation with eight people consisting of seven advertising consultants and one office coordinator. To determine the concept of network topology, the network consultant will have to consider that each person has a computer at her or his desk and every computer has a printer. Currently there are five network topologies available to choose from and are categorized into the following basic types: Bus Ring Star Mesh Hybrid More complex networks can be built as hybrids of two or more of the above basic topologies however, to understand each one; you must understand the basic concepts of each. First is the Bus Topology, bus network, which uses a common backbone to connect all devices. As the backbone of using a single cable that functions as a shared communication medium in which devices can attach or can tap into with the appropriate interface connector. Here, any device wanting to communicate with another device on the network has to send a broadcast message onto the wire so that all other devices can see, but only the intended recipient can actually accept and processes the message. Ethernet bus topologies are relatively easy to install and don't require much cabling compared to the alternatives. However, bus networks work best with a limited number of devices. If you connect more than a few dozen computers to the bus network, more than likely there will be performance problems. Also, if the backbone cable fails, the entire network effectively becomes inoperative. Next, there is the Ring Topology network is where each and every device within the network has two connection points that are used for communication. In this type of topology, all messages travel in a circle either clockwise or counterclockwise until it reaches the intended recipient. If there is a failure in any cable or a break the loop, it can render the entire network inoperative. Normally ring topologies are found in some office buildings or school campuses. Then there is the Star Topology, star network, which surrounds itself on a central connection point that may be a network hub, switch or router. In this type of topology, the devices are typically connected to the central connection point with two or more Unshielded Twisted Pair (UTP) Ethernet cabling. Also if there is failure in any cable or connection the affected area will be inoperable and not the entire LAN. A side note is that if the hub fails, in this configuration, the entire network will be rendered inoperable. Currently, many home networks use the star topology. The Mesh Topology involves the concept of routes. This type of topology is not similar to the previous topologies mentioned. However, when messages are sent on a mesh network, they can take any of several potential paths from the source to the destination. This is unlike the ring topology where there are only two cable paths that exist and messages can only travel in one direction. Mesh routing is used by WANs and can be seen most notably used by the Internet. 6 P a g e

7 Finally there is the Hybrid Topology. This type of topology integrates multiple topologies together primarily bus and star. In the simplest form of this type of topology, only hub devices can connect directly to the hybrid bus and then each hub will then function as a root of a hybrid chain of devices. One thing that is notable for the bus/star hybrid is its approach that supports future expandability of the network which is far more flexible than a bus or a star. Both of which have limitations whether it be in the number of devices and broadcast traffic or by the number of hub connection points. Question 1-3: Recommending a Topology for the Network Design (10 points) which topology do you recommend for Harrison and Associates network and include why you recommend it. Answer: For Harrison and Associates, I would recommend using the Star Topology. Primarily with the firm being a small business, it would be more feasible for the network to surrounds itself and operate on a central connection point which could be monitored and controlled. It would also be cheaper and cost effective to use Unshielded Twisted Pair (UTP) Ethernet cabling so that when or if there is failure in any cable or in one of the eight systems, only the affected system will be rendered inoperable and not the entire LAN. Case Project 2 (24 points) in the following assignments, you consult for the newsroom of the Franklin Daily Herald, a newspaper in a mid western city. All 17 of the news reporters have computers, and now their management has funded a project to network their computers and provide Internet access to the network. Having a network will enable the reporters to more easily collaborate on stories and exchange information. And it will save time for the news editor who checks all news articles before they are printed. The newsroom network will also connect to an existing network in the pressroom. Question 2-1: Implementing a Network Transport Method (10 points) One member of the newspaper s management wants to implement token ring for this network. What is your recommendation and how would you explain it to the management? Answer: If I were a network consultant, I would not recommend to the management that they use a token ring network. Primarily because a Token Ring type topology is used for small networks. I would attempt to explain to them that a token ring type of network has some advantage points of being very organized and each computer has equal access to resources but overall would not be best suited for the newsroom of their size. Schematically having 17 computers on a network that passes a token, attaches a message, and passes it around in a ring pattern from computer to computer in a closed loop until it reaches its destination would be a waste of resources. 7 P a g e

8 Question 2-3: Questions about the OSI Model (14 points) Brett Mason, a new colleague with whom you are working at Network Design Consultants, is unsure about some aspects of the OSI model. He has a list of questions for you and asks that you develop a table that he can use as a reference for the answers. Create a table containing two columns and seven rows. Label the left column Network Function, and label the right column OSI Layer. Enter each of the following functions in its own row under the left column and then specify the OSI layer that performs that function under the right column. Brett s questions about functions are as follows: Which layer resizes frames to match the receiving network? Which layer performs data compression? Which layer ensures data is received in the order it was sent? Which layer handles the data-carrying signal? Which layer provides file transfer services? Which layer enables routing? Which layer enables the receiving node to send an acknowledgment? Answer: Network Function Which layer resizes frames to match the receiving network? 2 Which layer performs data compression? 6 Which layer ensures data is received in the order it was sent? 4 Which layer handles the data-carrying signal? 5 Which layer provides file transfer services? 1 Which layer enables routing? 3 Which layer enables the receiving node to send an 7 acknowledgment? OSI Layer Case Project 3 (15 points) Prairie Press is a publishing company that produces books of fiction. The company employs 32 people and has offices on three floors in a downtown building. Each employee uses Windows XP Professional on a desktop or laptop computer. Prairie Press has two servers running Windows Server 2003 plus a Linux Web server. Currently, each floor in their building is wired using Category 5e UTP cable. Their communications devices are older half-duplex hubs and switches employing 10BaseT throughout the building on each floor and between floors. The building is scheduled for renovations and Prairie Press hires you through Network Design Consultants to assist in a new network design for a cabled network. Question 2-1: Desktop Cabling (5 points) You recommend 100 Mbps communications to the desktop and laptop computers on each floor. What cable medium can be used? 8 P a g e

9 Answer: Since I have already recommended 100Mbps communications in the scenario, I would also recommend that the company continue to use the Unshielded Twisted Pair cable for their desktop and laptop computers. Category 5e (enhanced) cables (Cat 5e), for computer networks such as Ethernet, is the only type of cable that is structured to provide performance of up to 100 MHz and is suitable for 10BASE-T. Question 2-2: Fat Pipe Cabling (5 points) What cabling do you recommend for linking the networks on each floor of the building? What are the advantages of the cabling that you recommend? Answer: I would recommend CAT 6 cabling as part of the upgrade to each floor of the building to link the networks. CAT6 cabling has the advantages and capabilities of 1000 Mbps which can be used in Fast Ethernet and Gigabit Ethernet networks. This cabling currently has the fastest UTP standard. Question 2-3: Connecting the Servers to the Network (5 points) What cabling options do you recommend for connecting the three servers to the network? Answer: In order to connect the servers to the network, I would recommend using fiber optic cabling. Fiber optic cabling has many benefits and is more secure and faster than twisted pair or coaxial cabling. It can be used for longer distances without the use of repeaters, carry more data at a higher capacity, it is thinner and lightweight. The primary difference for my recommendation is that it is EMI and RFI resistant. 9 P a g e