Apply Your Knowledge

Exercises

1.1. Enabling File and Print Sharing on Windows Me

After just three months working as a freelance accountant, you find yourself unable to cope with your workload. As a result, you decide to recruit an assistant to help you. Up to this point, you have had only a single PC for your business, but you now realize that you need an additional PC, so you can share data with your new assistant. You buy an additional PC with a small workgroup hub. After unpacking and connecting the new PC and connecting the new hub, you are ready to share data from your PC, which is running Microsoft Windows Me, with the other PC.

This exercise shows how you can enable file and print sharing. (This exercise assumes that you are running Windows Me.)

Estimated time: 10 minutes

1.	In Windows Me, right-click My Network Places and then select Properties. The Network dialog box appears.
2.	Click the File and Print Sharing button. The File and Print Sharing dialog box appears.
3.	Select the option to share your files and then click OK.
4.	If you're prompted to supply Windows files, input the correct location of your files. After the files have been copied, you will be prompted to reboot.
5.	Navigate to the folder you want to share. Right-click the folder and select Sharing from the drop-down menu. If the Sharing option does not appear, make sure you completed step 4 as described.
6.	In the Properties dialog box, select the Shared As option and enter the name you want to use for this share. If you want, you can add a password that users must supply when accessing the folder. Click OK.
7.	If the sharing process is successful, a blue hand appears under the folder, indicating that it is now shared and accessible to the network.

1.2. Connecting to Mapped Drives Through Windows 2000

After you enable file sharing in Exercise 1.1, you turn your attention to configuring your new PC to connect to the newly shared folder. The new PC came preloaded with Windows 2000 Professional, and although you have not used this version of Windows before, you have heard that the process of mapping network drives in Windows 2000 is similar to doing so on all other versions of Windows.

This exercise shows how you must connect to a mapped drive through Windows 2000. This exercise assumes that you have a PC running Windows 2000, that you are connected to a network on which at least one other system has a shared folder, and that you have the necessary rights to access that folder. You might also need a valid user ID and password for the target system.

Estimated time: 5 minutes

1.	In Windows 2000, right-click My Computer and select Map Network Drive from the menu. The Map Network Drive dialog box appears.
2.	Click the Browse button. The Browse for Folder dialog box appears.
3.	Expand the browse tree as necessary to locate another system that is sharing folders.
4.	When you have located a shared folder to connect to, double-click it. You are returned to the Map Network Drive dialog box.
5.	If you want, you can clear the Reconnect at Logon check box. Then click Finish. Depending on the configuration of the shared folder, you might be asked for a password.
6.	The contents of the folder you connected to appear in Windows Explorer.

Exam Questions

1:	Which of the following is a disadvantage of the physical bus topology? Has complex cabling requirements Is prone to cable faults Requires a dedicated server Requires a dedicated hub
A1:	b. One of the disadvantages of the physical bus topology is that it's prone to cable faults. In addition, a fault on the cable can render the entire network unusable. The advantages of the physical bus topology are that the cabling is simple and no additional network hardware is required to create the network. For more information, see the section “LAN Topologies,” in this chapter.
2:	Which of the following are IEEE standards that define LAN networking systems? (Choose the three best answers.) 802.3 802.4 802.5 802.10
A2:	a, b, c. The IEEE 802.3 standard defines Ethernet, the 802.4 standard defines token bus, and the 802.5 standard defines Token Ring. The IEEE 802.10 defines security standards that make it possible to safely and securely transmit and exchange data. For more information, see the section “The IEEE 802 Standards,” in this chapter.
3:	Which of the following IEEE standards provides the specifications for a Token Ring LAN? 802.3 802.4 803.3 802.5
A3:	d. The IEEE 802.5 standard defines Token Ring networking. The 802.3 standard defines Ethernet. 802.4 defines the use of a token-passing system on a linear bus topology. 803.3 is not a LAN standard. For more information, see the section “The IEEE 802 Standards,” in this chapter.
4:	Which of the following topologies offers the greatest level of redundancy? Mesh Star Bus Ring
A4:	a. In a mesh topology, each device is connected directly to every other device. If there is a break in the connection between two devices, alternate paths between the two systems are available. None of the other topologies provide this level of redundancy. For more information, see the section “LAN Topologies,” in this chapter.
5:	Which of the following IEEE specifications does CSMA/CD relate to? 802.2 802.3 802.4 802.5
A5:	b. The IEEE 802.3 standard defines the Ethernet networking system, which uses CSMA/CD as its media access method. 802.2 defines specifications for the LLC sublayer of the 802 standard series. 802.4 defines the use of a token-passing system on a linear bus topology. 802.5 defines Token Ring networking. For more information, see the section “The IEEE 802 Standards,” in this chapter.
6:	As a network administrator, you have been called to replace an NIC on a computer in a Token Ring network. After you replace the NIC and connect the cable, the computer cannot communicate on the network. Which of the following is the most likely problem? The NIC is configured for the wrong speed. A token must be created for the newly installed card. The card's address must be added to the token list. The computer must be inserted into the ring.
A6:	a. On a Token Ring network, all devices must be configured to run at the same speed. If a device is connected to the network and not configured for the correct speed, it will not work. None of the other answers are valid. For more information, see the section “The IEEE 802 Standards,” in this chapter.
7:	Which of the following IEEE standards specifies a physical star/logical ring topology and a token-passing access method? 802.1 803.2 802.5 802.2
A7:	c. The IEEE 802.5 standard defines Token Ring, a physical star/logical ring topology that uses token passing as a media access method. The 802.1 standard defines internetwork communications standards between devices and includes specifications for routing and bridging. 803.2 is not a LAN standard. 802.2 defines specifications for the LLC sublayer of the 802 standard series. For more information, see the section “The IEEE 802 Standards,” in this chapter.
8:	Which network topology is represented in the following diagram? Bus Star Logical ring Mesh
A8:	a. The diagram shows the physical bus topology. None of the other answers are valid. For more information, see the section “LAN Topologies,” in this chapter.
9:	Part of your responsibility as network administrator is to design your company's new network. You have been asked to implement a network in which each computer must have guaranteed and equal access to the network. Which of the following would best suit your company's needs? Token Ring Mesh topology Ethernet CSMA/CD
A9:	a. Token Ring uses a token-passing media access method that provides guaranteed and equal access to the network media. Ethernet, the only other reasonable answer, uses CSMA/CD to govern media access. For more information, see the section “The IEEE and Networking Standards,” in this chapter.
10:	Which of the following topologies has a single connection between each node on the network and a centralized device? Ring Mesh Star Bus
A10:	c. A star topology is created when each node on the network is connected to a central device. None of the other answers are valid. For more information, see the section “LAN Topologies,” in this chapter.
11:	Which of the following devices is associated with a Token Ring network? Switch Hub MSAU CSMA/CD
A11:	c. An MSAU is used on Token Ring networks to connect systems to the network. Switches and hubs are used on Ethernet networks. CSMA/CD is a media access method, not a networking device. For more information, see the section “The IEEE 802 Standards,” in this chapter.
12:	As a network administrator, you are called in to correct a problem associated with the network's MSAU. What physical topology are you troubleshooting? Star topology Ring topology Mesh topology Bus topology
A12:	a. Because MSAUs are being used, the network system in use is Token Ring. The use of MSAUs on a Token Ring network creates a physical star configuration. Star topologies are most commonly associated with Ethernet networks. Mesh topologies do not use MSAUs. Token passing, not Token Ring, can be implemented on a bus network, per the IEEE 802.4 standard, though such a configuration would not use MSAUs; therefore, Answer d is incorrect. For more information, see the section “The IEEE 802 Standards,” in this chapter.
13:	What is the name for a network that connects two geographic locations? PAN LAN DAN WAN
A13:	d. The term WAN describes a network that spans more than one geographic location. The only other valid term for a type of network is LAN, but a LAN is a network that is confined to a single location. None of the other answers are recognized terms for describing a network. For more information, see the section “LANs, WANs, and MANs,” in this chapter.
14:	Which network topology is represented in the following diagram? Bus Star Mesh Ring
A14:	d. The diagram shows a physical ring topology. All the other answers are incorrect. For more information, see the section “LAN Topologies,” in this chapter.
15:	Which of the following is a feature of the physical star topology? It requires less cable than other physical topologies. The network is very easy to expand. Apart from the cable and connectors, no other equipment is required to create the network. There is no single point of failure.
A15:	b. Physical star networks use centralized devices to connect nodes on the network. Because devices can be plugged and unplugged from these devices without affecting any other systems on the network, star configurations are very easy to expand. The disadvantages of a physical star network are that they require more cable than other topologies, they require additional networking equipment, and they create a single point of failure. For more information, see the section “LAN Topologies,” in this chapter.
16:	The 802.11b standard describes what kind of network? Token passing Contention Wireless Token bus
A16:	c. The IEEE 802.11b standard defines wireless networking architectures. Token passing and contention are media access methods, and token bus is an implementation of token-passing media access on a physical bus topology. For more information, see the section “The IEEE and Networking Standards,” in this chapter.
17:	A mainframe is an example of what computing model? Segregated Distributed Centralized Decentralized
A17:	c. A mainframe is an example of a centralized computing model. All the other answers are incorrect. For more information, see the section “Peer-to-Peer Versus Client/Server Networks,” in this chapter.
18:	What kind of access method is CSMA/CD? Contention Demand priority Collision avoidance Token passing
A18:	a. CSMA/CD is described as a contention-based media access method because devices contend for access. All the other answers are incorrect. For more information, see the section “The IEEE and Networking Standards,” in this chapter.
19:	Which network topology is represented in the following diagram? Star Bus Mesh Ring
A19:	a. A star topology is shown in the diagram. All the other answers are incorrect. For more information, see the section “LAN Topologies,” in this chapter.
20:	What is the maximum network speed defined by the 802.11b standard? 100Mbps 5.5Mbps 11Mbps 10Mbps
A20:	c. The IEEE 802.11b standard for wireless networks defines a maximum speed of 11Mbps. 100Mbps is the defined speed for Fast Ethernet. 5.5Mbps is the speed specified in earlier wireless networking standards. 10Mbps is the maximum speed of standard Ethernet. For more information, see the section “The IEEE and Networking Standards,” in this chapter.

Suggested Readings and Resources

1. Sloan Joseph D . Network Troubleshooting Tools (O'Reilly System Administration). O'Reilly & Associates, 2001.

2. Habraken, Joe . Absolute Beginner's Guide to Networking, third edition. Que Publishing, 2001.

3. Haugdahl, J. Scott . Network Analysis and Troubleshooting. Addison-Wesley, 2000.

4. Cisco Systems Inc. Internetworking Troubleshooting Handbook, second edition. Cisco Press, 2001.

5. Computer networking products and testing tools, www.trendware.com.

6. Network cable information, www.techfest.com/networking/cabling.htm.

7. Computer networking tutorials and advice, compnetworking.about.com.

8. “TechEncyclopedia,” www.techencyclopedia.com.

9. Networking technology information from Cisco, www.cisco.com/public/products_tech.shtml.

10. “Network Cabling Help,” www.datacottage.com.