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Guide To Networking Essentials, 7th Edition Solution Manual

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 1 Solutions - 1 Chapter 1 Solutions Review Questions 1. W hich of the following is one of the three basic functions a computer performs? (Choose all that apply.) a. Processing c. Input e. Output 2. The __________ executes instructions provided by computer programs. a. CPU 3. When a CPU is composed of two or more processors, each one is referred to as a(n) ________. b. Core 4. W hich of the following is considered long - term storage? (Choose all that apply.) a. Flash drive d. Hard drive 5. W hich motherboard component controls data transfers between memory, expansion slots, I/O devices, and the CPU? c. Chipset 6. You want to purchase a new high - performance graphics card for your computer. W hich type of connector should it have? d. PCI - Express 7. The time it takes for read/write heads to move to the correct spot on the platter is the ____________. b. Seek time 8. W hich of the following is a task usually performed by the BIOS? (Choose all that apply.) a. Perform a POST. d. Begin the boot procedure. 9. Place the following steps of the boot procedure in order. a. The OS is loaded into RAM. b. CPU starts. c. OS services are started. d. Power is applied. e. The POST is executed. f. Boot devices are searched. A nswer: d, b, e, f, a, c

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 1 Solutions - 2 10. W hich of the following is a critical service provided by the OS? (Choose all that apply.) b. Memory management d. File system 11. An OS ’ s capability to run more than one application or process at the same time is referred to which of the following? c. Multitasking 12. You have just installed a new NIC in your PC to replace the old one that had started malfunctioning. What additional software must be installed to allow the OS to communicate with the new NIC? b. Device driver 13. W hich of the following requests information stored on another computer? b. Network client 14. Choose the correct order for the process of a user attempting to access network resources: 1. Network protocol 2. Application 3. Network client 4. NIC driver d. 2, 3, 1, 4 15. TCP/IP is an example of which of the following? d. Network protocol 16. In network communication, the ______________ address is used to deliver a frame to the correct computer on the network. (Choose all that apply.) a. MAC d. Physical 17. A(n) ______________ message is used to determine whether a computer is listening on the network. b. Ping 18. TCP/IP uses _________ to look up a computer ’ s IP address, given its name. a. DNS 19. The unit of information containing MAC addresses and an error - checking code that ’ s processed by the network interface layer is referred to as a _______________. c. Frame 20. Data is processed from the time an application creates it to the time it reaches the network medium. This process include s adding information such as addresses and is called which of the following? b. Encapsulation 21. Y ou ’ re the network administrator for a company that has just expanded from one floor to two floors of a large building, and the number of workstations you need has

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 1 Solutions - 3 doubled from 50 to 100. You're concerned that network performance will suffer if you add computers to your existing LAN. In addition, new users will be working in a separate business unit, and there are reasons to logically separate the two groups of computers. What type of network should you configure? c. Internetwork 22. W hich of the following best describes a client? b. A computer ’ s primary role in the network is to run user applications and access network resources. 23. You work for a small company with four users who need to share information on their computers. The budget is tight, so the network must be as inexpensive as possible. What type of network should you install? b. Peer - to - peer network 24. Which of the following characteristics is associated with a peer - to - peer network? (Choose all that apply.) a. Decentralized data storage b. Inexpensive c. User - managed resources 25. A device interconnects five computers and a printer in a single office so that users can share the printer. This configuration is an example of which of the following? a. LAN 26. At Yavapai College, the Prescott and Prescott Valley campuses (8 miles apart) have LANs connected via the local phone company. This configuration is an example of which of the following? (Choose the best answer.) a. MAN 27. You have installed Windows Server 2008 on a new server and want to centralize user logons and security policies. What type of software should you install and configure on this server? d. Directory services 28. Peer - to - peer networks aren ’ t suitable in which of the following situations? a. Tight security is required. 29. W hich of the following best describes a storage area network? b. Uses high - speed networking technologies to give servers fast access to large amounts of disk storage 30. Why might Windows 7 or Windows Vista require more RAM or disk space than Windows Server 2008 ? d. They support a graphics - intensive user interface. Hands - On Projects Hands - On Project 1 - 1 Step 2 : S teps of the boot procedure: 1. Power is applied to the motherboard .

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 1 Solutions - 4 2. CPU starts . 3. CPU carries out BIOS startup routines, include the POST . Step 5 : F inal steps of the boot procedure: 4. Boot devices are searched for an OS . 5. The OS is loaded into RAM . 6. OS services are started . Hands - On Project 1 - 3 Step 5 : • Word - processing program: User application • NIC displayed in the Connect using text box: Network interface • Client for Microsoft Networks: Network software • File and Printer Sharing for Microsoft Networks: Network software • Internet Protocol Version 4: Network protocol Hands - On Project 1 - 5 Step 2 : workgroup, peer - to - peer Hands - On Project 1 - 6 Step 10 : File sharing , p eer - to - peer Case Projects Case Project 1 - 1 A server - based network is the best choice. A peer - to - peer network might work for now , but when new employees are hired, a peer - to - peer network would be too difficult to manage. The key is that easy backup and centralized storage for files point to a server - based network. Case Project 1 - 2 Because employees must be able to control access to their own resources, a peer - to - peer model works best. S upplies will likely include NICs, cabling, and a switch. Students should state they need to configure file shares and possibly create user accounts on the computers to allow access by other users. They might also need to configure IP address settings , although self - configuring address es could be used . Case Project 1 - 3 An internetwork is called for because LANs in the same building are being connected . A router is probably needed for communication between LANs on the two floors. Case Project 1 - 4 A personal area network (PAN) Case Project 1 - 5

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 1 Solutions - 5 Answers will vary.

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 2 Solutions - 1 Chapter 2 Solutions Review Questions 1. W hich of the following is a limitation of early networks that used a daisy - chain method of connecting computers? (Choose all that apply.) a. Total number of computers that could be connected c. Cable length 2. W hich of the following is true of a repeater? c. Receives bit signals and strengthens them 3. W hich of the following is true of a hub? (Choose all that apply.) b. Transmits regenerated signals to all connected ports c. Usually has four or more ports 4. W hich of the following is the unit of measurement by which a hub's bandwidth is usually specified? b. Bits per second 5. W hich of the following describes how devices connected to a hub use the speed at which the hub can transmit data? c. Bandwidth sharing 6. W hich of the following is a likely indicator light on a hub? (Choose all that apply.) b. Link status c. Connection speed d. Activity 7. W hich of the following describes how devices connected to a switch use the speed at which the switch can transmit data? a. Dedicated bandwidth 8. What does a switch use to create its switching table? d. Source MAC addresses 9. What purpose does the timestamp serve in a switching table? c. Tells the switch when to delete an entry 10. What feature of a switch allows devices to effectively communicate at 200 Mbps on a 100 Mbps switch? b. Full - duplex mode 11. To w hich device is a wireless access point most similar in how it operates? a. Hub 12. What ’ s the purpose of an RTS signal in wireless networking? c. It allows a client to notify the AP that it's ready to send data. 13. W hich of the following is a common operational speed of a wireless network? d. 11 Mbps

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 2 Solutions - 2 14. W hich of the following is a task performed by a NIC and its driver? (Choose all that apply.) a. Provides a connection to the network medium c. Receives packets from the network protocol and creates frames e. Adds error - checking data to the frame 15. W hich of the following best describes a MAC address? b. Two 24 - bit numbers, in which one is the OUI 16. Under which circumstances does a NIC allow inbound communications to pass through the interface? (Choose all that apply.) b. The destination MAC address matches the built - in MAC address. c. The destination MAC address is all binary 1s. 17. How does a protocol analyzer capture all frames? c. It configures the NIC to operate in promiscuous mode. 18. In Windows 7, which of the following displays information about currently installed NICs? a. Network Connections 19. W hich of the following is the purpose of an SSID? d. Identifies a wireless network 20. W hich of the following describe the function of routers? (Choose all that apply.) b. Connect LANS d. Work with packets and IP addresses 21. What information is found in a routing table? b. Network addresses and interfaces 22. You currently have 15 switches with an average of 20 stations connected to each switch. The switches are connected to one another so that all 300 computers can communicate with each other in a single LAN. You have been detecting a high percentage of broadcast frames on this LAN. You think the number of broadcasts might be having an impact on network performance. What should you do? c. Reorganize the network into smaller groups and connect each group to a router. 23. Review the routing table in Figure 2 - 29. Based on this figure, where will the router send a packet with the source network number 1.0 and the destination network number 3.0? c. WAN B 24. If a router receives a packet with a destination network address unknown to the router, what will the router do? b. Discard the packet. 25. Which of the following is true about routers? (Choose all that apply.) b. Use default routes for unknown network addresses c. Forward unicasts Challenge Labs Challenge Lab 2 - 1

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 2 Solutions - 3  What filter options (if any) did you configure i n Wireshark? Students should have created an ICMP filter for Wireshark.  What commands did you use to generate packets on the network? Students should ping each other to create traffic.  What IP addresses did you attempt to communicate with? Students should use IP addresses so that some ping traffic is directed to their computers and other pings are going to other computers on the network.  What was your result? Is your computer attached to a hub or switch? Why did you come to this conclusion? If all traffic was captured by Wireshark, including ping packets that weren ’ t sent to the student ’ s computer, a hub is being used. If only packets addressed to the student’s computer were captured, a switch is being used. Challenge Lab 2 - 2  What type of packets does Trace Route use? Tracert in Windows uses ICMP packets; some Trace Route programs use UDP packets.  What is the response each router sends back to your computer? Each router sends a “ TTL expired ” message.  How does your computer get a response from each router between your computer and the destination? The TTL starts with a value of 1 and is incremented by 1 for each set of packets that’s sent. The packet’s TTL is decremented by each router encountering it. When the TTL reaches 0, the router that has the packet sends a "TTL expired" message back to the sending machine. In this way, the first set of packets with TTL=1 get to the first router, which decrements the TTL to 0 and sends a “ TTL expired ” message back to the sender. The second set of packets has a TTL of 2, so it gets to the second router before expiring and so on, until the destination device is reached. Chapter 5 covers more on TTL and ICMP. Case Projects Case Project 2 - 1 Because the main problem is caused by collisions, replacing some or all hubs with 10/100 Mbps switches should solve the problem. Switches would prevent most collisions, and the faster speed would also help with overall network response times. In addition, a switch can operate in full - duplex mode, allowing machines to send and receive data at the same time. NICs might have to be upgraded to take advantage of the faster speed and full - duplex mode. Cabling might need to be upgraded if it’s not at least Category 5. A router could also be added to divide the LAN into two smaller LANs, but this extra expense might be overkill to solve th e problem. The problem doesn’t seem to be excessive broadcast traffic, which is one of the key problems routers solve. Adding a router to this network wouldn’t be incorrect — perhaps just unnecessary. Case Project 2 - 2 Because broadcast traffic is a key problem, a router should be configured to divide the LAN into two or more smaller LANs. In addition, the router must be configured correctly with IP addresses and the workstations configured with default gateways. Also, the workstations and servers on each IP network need to be configured with IP addresses suitable for the network they’re on. Chapter 5 covers m ore on IP addressing.

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 2 Solutions - 4 Case Project 2 - 3 Answers will vary. Students should write a two - to three - sentence description of each term.

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 3 Solutions - 1 Chapter 3 Solutions Review Questions 1. W hich of the following describes the arrangement of network cabling between devices? c. Physical topology 2. W hich of the following is an advantage of a star topology? (Choose all that apply.) a. Allows faster technologies than a bus does c. Centralized monitoring of network traffic 3. W hich of the following is an example of a technology using a physical ring topology? b. FDDI 4. W hich technology is likely to be implemented as a point - to - point physical topology? d. Wireless bridge 5. W hich of the following describes a hub - based Ethernet network? b. Logical bus 6. W hich of the following is a characteristic of a logical ring topology? (Choose all that apply.) b. One technology uses a n MAU. c. It’s used by FDDI. d. Some technologies use a token. 7. W hich best describes a typical wireless LAN? c. Logical bus topology 8. W hich of the following is a characteristic of a switched logical topology? (Choose all that apply.) b. Creates dynamic connections d. Uses a physical star topology 9. W hich of the following is a characteristic of unshielded twisted - pair cabling? (Choose all that apply.) c. Has a distance limitation of 100 meters d. Susceptible to electrical interference 10. W hich of the following is a characteristic of fiber - optic cabling? (Choose all that apply.) a. Can be used in electrically noisy environments c. Carries data over longer distances than UTP does 11. W hich topology most likely uses coaxial cabling? c. Physical bus 12. W hich of the following is true of a MAC address?

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 3 Solutions - 2 c. A destination address of 12 hexadecimal Fs is a broadcast. 13. W hich of the following is the most commonly used Ethernet frame type? a. Ethernet II 14. W hich of the following is a field of the most common Ethernet frame type? (Choose all that apply.) b. FCS c. Destination MAC Address d. Data 15. W hich access method uses a “ listen before sending ” strategy? b. CSMA/CD 16. W hich of the following is true about full - duplex Ethernet? (Choose all that apply.) b. Collision detection is turned off. c. It’s possible only with switches. 17. Which of the following is defined by the extent to which signals in an Ethernet bus topology network are propagated? b. Collision domain 18. W hich of the following is considered a property of Ethernet? (Choose all that apply.) a. Scalable b. Best - effort delivery system 19. W hich of the following is true of IEEE 802.3an? d. Operates only in full - duplex mode 20. W hich of the following is a feature of 100BaseFX? (Choose all that apply.) a. Often used as backbone cabling d. Uses two strands of fiber 21. W hich Wi - Fi standard can provide the highest bandwidth? c. 802.11n 22. Which of the following is true about infrastructure mode in wireless networks? (Choose all that apply.) b. Uses a central device d. Most like a logical bus and physical star 23. How many channels can be used on an 802.11b network in North America? c. 11 24. W hich media access method does Wi - Fi use? d. CSMA/CA 25. Which of the following is true about the token ring technology? (Choose all that apply.) b. All computers have equal access to the media. d. Only the computer with the token can transmit data.

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 3 Solutions - 3 Challenge Labs Challenge Lab 3 - 1 Example: • What type of device are the computers attached to? The computers are attached to a logical bus topology device, which is a hub. • What type of device is at the center of the extended star? The center of the extended star should be a switch because each switch port makes a collision domain. • How many collision domains are in this network? There's one collision domain for each connected switch port. In the sample drawing, there are four collision domains. Challenge Lab 3 - 2 • Which device in your extended star did you connect the AP to and why? To provide the best access for your wireless devices, the AP should be connected to the switch in the center of the extended star. • Which wireless mode are you using: ad hoc or infrastructure? Because you ’ re using an AP or wireless router, you ’ re using infrastructure mode. • What logical and physical topology does adding wireless bring to this network? The logical topology is a bus, and the physical topology is a star. Challenge Lab 3 - 3 • Approximately how many wireless networks did inSSIDer find? Answers will vary. • Which wireless channels are the most heavily used? Answers will vary. • If you were to set up a new wireless LAN based on what inSSIDer found, what channel would you use for the network? Answers will vary but should correlate with the answer to Question 2 , in which student s should choose one of the less heavily used channels. Case Projects Case Project 3 - 1 • What changes in equipment are required to bring this company’s network up to date to solve the shared - bandwidth problem? A switch, possibly working at a faster rate, such as 100 Mbps or 1 Gbps.

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 3 Solutions - 4 • What topology and which type of device can be used in the manufacturing area to solve the cabling difficulties? Use a wireless AP in a star topology, and equip computers with wireless NICs , assuming there’s not substantial radio frequency interference to interfere with wireless signals. Case Project 3 - 2 • What type of topology should be used in this network? An extended star should be used, with a switch as the central device. • Will the network be peer to peer or server based? The discussion of EBiz.com’s requirements mentions five existing servers, without requiring the introduction of new servers, so this implementation obviously involves a server - based network. • How many computers will be attached to the network? Counting the servers, 255 computers (5 existing servers, 250 employee workstations). • What kind of networking device is easiest to reconfigure? What kind offers the best access to the network medium’s bandwidth between pairs of devices? These questions are a dead giveaway that the required solution must be built around a switch for the overall network. Case Project 3 - 3 • Will the network be peer to peer or server based? The discussion of ENorm, Inc.’s requirements mentions access to two separate centralized databases, so this network must be server based. • How many computers will be attached to the network? Counting the servers, and assuming all 20 workstations are attached in each factory floor work cell, a total of 92 computers (2 servers, 50 front - office employee workstations, and 40 factory floor employee workstations). • What topology works best for the offices, given the availability of wiring closets? What topology works best for the factory floor, given its need for constant reconfiguration? The availability of wiring closets for office workstations indicates that a physical star topology will work (the most commonly used in that kind of office situation); the need for constant reconfiguration on the factory floor indicates that a flexible solution is required. Normally, this requirement dictates wireless or bus topology solutions. Although a physical bus topology can be flexible, it’s not nearly as flexible as a wireless topology, and physical bus topologies are obsolete. Wireless is probably the best way to go, assuming the manufacturing space doesn’t use devices that emit radio frequency interference, such as microwave ovens, cordless handsets, and so forth.

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    Guide to Networking Essentials , 6th ed., ISBN 1111312524 Ch. 4 Solutions - 1 Chapter 4 Solutions Review Questions 1. Which of the following is a common characteristic of a networking medium? (Choose all that apply.) a. Bandwidth rating b. Interference susceptibility d. Maximum segment length 2. Which of the following types of fiber - optic connectors provides high density and requires only one connector for two cables? c. MT - RJ 3. Which of the following conditions requires cables not to exceed a recommended maximum length? d. Attenuation 4. W hich of the following is the process for representing bit signals on the medium? b. Encoding 5. What happens to signals as they travel the length of the medi um? c. They attenuate. 6. W hich of the following is UTP susceptible to? (Choose all that apply.) a. EMI b. Crosstalk 7. The space between a false ceiling and the true ceiling where heating and cooling air circulates is called the ______________. d. Plenum 8. What type of connector is used most commonly with TP network wiring? b. RJ - 45 9. 9. You have been hired to install a network at a large government agency that wants to reduce the likelihood of electronic eavesdropping on its network. What type of cable is most resistant to eavesdropping? d. Fiber optic 10. W hich of the following is a characteristic of unshielded twisted - pair cable? (Choose all that apply.) c. Has a distance limitation of 100 meters d. Is susceptible to electrical interference 11. W hich of the following is a characteristic of fiber - optic cabling? (Choose all that apply.) a. Can be used in electrically noisy environments c. Carries data over longer distances than UTP

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