CompTIA Network+ Certification Study Guide part 73 potx

Appendix C 706 You have been asked to set up a routed network within your 15. company. Your company routers are homogenous, having stan- dardized on Cisco. You want to set up the best routing solution within your company for this equipment. What routing protocol would you use? A. RIP B. OSPF C. IS-IS D. EIGRP Correct answer and explanation: D. Cisco has a proprietary routing pro- tocol called EIGRP, which they believe is the best. Cisco would recommend that you use this routing protocol. Incorrect answers and explanations: A, B, and D. Answer A is incorrect; though RIP is a standard, it does not have as many factors in path deter- mination as EIGRP. Answer B is incorrect; OSPF has many factors used in path determination but is not preferred over EIGRP with Cisco equipment. Answer C is incorrect; IS–IS would be a good choice, but is not preferred over EIGRP on Cisco equipment. You have a DHCP server that is configured to have only 10 addresses 16. available in the pool of addresses to be handed out. When a colleague tries to lease an IP address, he is unable to do so. In viewing the log, you see the following packets relating to his attempt to get an address. DHCPDiscover, DHCPOffer, DHCPRequest, DHCPNack. What might be the potential cause of the issue? A. The DHCP server is not running. B. The DHCP server handed out an IP address to your colleague. C. The DHCP server was unable to hand out an IP address to his system. D. The DHCP server is really a BootP server. Correct answer and explanation: C. The DHCP communicated with the client but was unable to provide an IP address indicated by the DHCPNack packet. Incorrect answers and explanations: A, B, and D. Answer A is incor- rect. The server is running because the server did send DHCPOffer and DHCPNack packets. Answer B is incorrect. The DHCPNack packet indi- cates that the server could not provide an IP address to your colleague. Answer D is incorrect. DHCP is just an enhanced version of the original BootP protocol. Appendix C 707 ChApTEr 8: wIdE ArEA NETworKING As the primary lead on your company’s helpdesk, you are asked 1. to help resolve a problem call with an ISDN line. A customer wants to upgrade an existing ISDN line because it’s currently too slow. Right now, he is using a single BRI ISDN circuit-switched B channel. From the available choices, what should his transmis- sion rate be? A. 56 Mbps B. 64 Kbps C. 128 Kbps D. 256 Mbps Correct answer and explanation: C. When working with ISDN technology, always remember that the transmission rate of a single BRI ISDN B channel is 64 Kbps. Incorrect answers and explanations: A, B, and D. Answer A is incorrect because the rate is 64 Kbps, not 56 Mbps. Answer B is incorrect because the rate is 64 Kbps, not 128 Kbps. Answer C is incorrect because the rate is 64 Kbps, not 256 Mbps. As the network administrator for your company, you are asked by 2. your CIO to design and deploy a data link between two offices of your company. There are 10 employees located in each office. Your main concerns are the speed of the connections, the reliability of transferring of data, and the cost. Which solution should you implement? (Choose one.) A. Place a modem on a server in each office so they can connect. B. Connect an ISDN circuit to each workstation in both locations. C. Use an ISDN circuit connected to a dedicated location or server in each building. D. Have each workstation at both locations use a modem to con- nect to opposite offices. Correct answer and explanation: C. ISDN provides better speed, connec- tion time, and reliability than a modem. ISDN can be connected to systems in many ways because of the different adapters that can be used with it. ISDN circuits will be terminated on a device or within a location, not on a modem, or on individual workstations using modems. Appendix C 708 Incorrect answers and explanations: A, B, and D. Answer A is incorrect because ISDN circuits will be terminated on a device or within a location, not on a modem, or on individual workstations using modems. Answer B is incorrect because ISDN circuits do not terminate on workstations. Answer D is incorrect because ISDN circuits will be terminated on a device or within a location, not on a modem, or on individual workstations using modems. You are the IT manager for rsnetworks.net. As the person respon-3. sible for recommending the right technology, what would you select as the solution to provide the fastest connectivity? (Select one.) A. T3 B. T1 C. ISDN BRI D. Cable Modem Correct answer and explanation: A. The T3 provides the fastest connectiv- ity. T3s provide access up to 45 Mbps. Incorrect answers and explanations: B, C, and D. Answer B is incorrect because a T1 provides up to 1.544 Mbps. Answer C is incorrect because ISDN BRI provides up to 128 Kbps. Answer D is incorrect because a cable modem network is generally up to 10 Mbps. You want to connect a remote office to a corporate network. The 4. only available service is an analog dial-up line provided by the local telephone company. What device would you need to implement to use this analog dial-up solution? A. CSU/DSU B. ISDN adapter C. Modem D. NIC Correct answer and explanation: C. A modem is used to connect to the Internet using the local telephone company’s telephone lines. Incorrect answers and explanations: A, B, and D. Answer A is incor- rect because a CSU/DSU is a multiplexer generally used with T1 access. Answer B is incorrect because an ISDN adapter is used for digital service, not analog. Answer D is incorrect because a NIC is used for connecting a system to a local area network. As the Network Manager for rsnetworks.net, you need to imple-5. ment a solution that will allow for sporadic connection to the Appendix C 709 Internet. Your only requirement is that you find a solution that will provide a connection of up to 128 Kbps to the Internet, only when needed. Which solution should you implement? A. T1 B. T3 C. 56 Kbps D. BRI ISDN Correct answer and explanation: D. BRI ISDN provides up to 128 Kbps. Incorrect answers and explanations: A, B, and C. Answer A is incorrect because a T1 is a dedicated connection, it’s always on, and you always pay for its use. It’s also 1.544 Mbps. Answer B is incorrect because a T3, much like a T1, is a dedicated connection providing up to 45 Mbps. Answer C is incorrect because a 56 Kbps leased line will only provide up to 56 Kbps. As a network manager for your company’s high-speed network, 6. you are looking to implement a new line from a remote site (Chicago) to the company’s core hub (New York) where the main- frame is located. The mainframe is where all the company’s sales orders are placed daily. The hub site is where all sites get their Internet access and where they upload and download files. Con- nection to this mainframe 24 hours a day is essential to meeting the business plan. You have just heard from your systems engineer that users are no longer able to access the mainframe from the remote sites; the users at the core site are still able to access the mainframe. Within minutes, the connection is restored and all users are able to access the mainframe once more. From careful analysis, you uncover that during the time that the remote users were not able to access the mainframe, one user had been downloading a very large file from the Internet to the remote site user’s PC. You find that the user was downloading a legitimate file and will be doing so each day. You cannot afford this type of network slowdown each day, so you decide to allow for the upgrading of the line. It’s currently at 128 Kbps using ISDN BRI. You have found that after careful analysis of the remote sites’ usage patterns and looking over the documentation of the current network, an upgrade of approximately 1.5 Mbps is needed across all links. Which technology would you implement? (Choose one.) A. ADSL B. E1 C. LAN adapter D. T1 Appendix C 710 Correct answer and explanation: D. T1. Incorrect answers and explanations: A, B, and C. Answer A is incorrect because ADSL is not good for uploading, just for downloading, and it is not fast enough to meet the required needs. Answer B is incorrect because an E1 doesn’t even apply; this technology is European based and the company is located in the United States. Answer C is incorrect because a LAN adapter, which can deliver amazing speeds, is a LAN-based technology, not a WAN-based technol- ogy, which is what is used to connect the remote sites to the core. The PSTN is the analog-based telephone system we have come to 7. learn to be very familiar with today. What are some of the features of PSTN? (Choose all that apply.) A. Compared to DSL and ISDN, it is inexpensive. B. Worldwide installation base in use and readily available. C. Easy to use and configure. D. Transfer rates of 64 Kbps. Correct answers and explanations: A, B, and C. Answers A, B, and C are all correct because the PSTN is a readily available, easy to use, and is a rela- tively inexpensive method to dial up to an ISP and connect to the Internet. Incorrect answer and explanation: D. Answer D is incorrect because the PSTN has a transfer rate of 56 Kbps, whereas the answer specified 64 Kbps. You are a network administrator at your company. Your company 8. has a number of sales and marketing users who work remotely and telecommute from home or from sales meetings. These users dial into a remote access service (RAS) server to access the corporate headquarters. One day, one of the sales users dials up the RAS server to connect to the corporate headquarters network to access a few files. The sales user dials up the RAS server and cannot connect. The sales user when asked reports that there is no dial tone. What is the cause of the problem? (Choose one.) A. Telephone company problem. B. The modem does not support the PC. C. The modem settings are set incorrectly. D. There are no settings configured within Windows. Correct answer and explanation: A. If there is no dial tone on the line; you will not be able to dial out to the RAS server to connect to your corporate network. For the network+ exam, you will be expected to troubleshoot many scenarios, so make sure you read them very carefully. Appendix C 711 Incorrect answers and explanations: B, C, and D. Answer B is incorrect because neither the modem nor the PC is the problem; the problem is with the carrier. There is no dial tone; therefore, you will not be able to dial out. Answer C is incorrect because the modem settings are not the root cause of the problem. Answer D is incorrect because the Windows Operating system is installed on a PC, which has nothing to do with the absence of dial tone. You are the network technician at your company. You are configur-9. ing a Windows NT 4.0 laptop for dial-up networking. The laptop will be used by a telecommuter. The telecommuter will use the laptop to dial into a Microsoft Windows NT 4.0 RAS server. Once connected, the telecommuter will need access to a UNIX machine. What should you install on the laptop? (Choose two.) A. TCP/IP Protocol B. RDP C. VPN D. Dial-up networking Correct answers and explanations: A and D. You will need to have dial-up networking and the TCP/IP protocol installed on your Windows system to dial into a Windows NY 4.0 RAS server. Incorrect answers and explanations: B and C. Answer B is incorrect because RDP (Remote Desktop Protocol) is not needed for connectivity to a RAS server. RDP is used to make connections to remote hosts. Answer C is incorrect because a VPN is a secure network created over an insecure one (namely the Internet). You are a consultant looking over network documentation for a 10. small company with one core site and two remote sites. Router A shows the location of the corporate headquarters where there is also a link out for Internet access and another remote site configured to also connect to the core. From Figure 8.8, what type of WAN tech- nology is in use based on the information shown for Link A? A. DSL B. T3 C. T1 D. FDDI Correct answer and explanation: C. Based on the information given, it is clear that a T1 is in use. Incorrect answers and explanations: A, B, and D. Answer A is incorrect because DSL does not operate in a point-to-point fashion, nor does it operate Appendix C 712 at the speed shown in the illustration. Answer B is incorrect because a T3 operates at 45 Mbps, not 1.544. Answer D is incorrect because a cable net- work is a shared network that supports speed up to 10 Mbps. FIGurE 8.8 WAN Technology. You are the network manager and you just sat down for lunch at your 11. desk. You notice that you have to troubleshoot a circuit switching network from a note written by your boss. Your boss has also placed a picture of this circuit-switched network on your desk. What is the usual WAN technology associated with circuit-switched networks? A. Internet Services Digital Network B. Integrated Services Digital Netware C. Integrated Services Diagram Network D. Integrated Services Digital Network Correct answer and explanation: D. Integrated Services Digital Network (ISDN). The switched circuit is initiated with the circuit number of the remote network. In the case of ISDN, the setup will use a SPID (service pro- vider ID) number, which is essentially a phone number that the router dials to initiate the circuit with the WAN switch. Incorrect answers and explanations: A, B, and C. A. Internet Services Digital Network, Integrated Services Digital Netware, and Integrated Services Diagram Network are all incorrect acronyms of ISDN. What is the difference between ISDN and dial-up?12. A. Both use dialing, but dial-up is based on the WAN and uses ana- log lines, whereas ISDN (and DSL) are both digital. Appendix C 713 B. Neither use dialing, but dial-up is based on the telephone system and uses analog lines, whereas ISDN (and DSL) are both analog. C. Both use dialing, but dial-up is based on the telephone system and uses digital lines, whereas ISDN (and DSL) are both digital. D. Both use dialing, but dial-up is based on the telephone system and uses analog lines, whereas ISDN (and DSL) are both digital. Correct answer and explanation: D. Both use dialing, but dial-up is based on the telephone system and uses analog lines, whereas ISDN (and DSL) are both digital. Incorrect answers and explanations: A, B, and C. A. Dial-up is NOT based on the WAN but rather telephone systems. B. Both use dialing and ISDN (and DSL) are both digital. C. Dial-up is based on the telephone system and use analog lines. You just got hired on to a Mobile Telecommunication Cellular 13. company and your first assignment is to teach your junior network engineers what WIMAX is. What description best describes what WIMAX is and stands for? A. WIMAX stands for WWW Interoperability for Microwave Access. It is based on IEEE 802.16 standards or Broadband Wire- less Access. An acceptable rule of thumb is that WIMAX will sustain 70 Mbps transmission rates at approximately 15 miles. B. WIMAX stands for Worldwide Interoperability for Microwave Access. It is based on IEEE 802.11 standards or Broadband Wire- less Access. An acceptable rule of thumb is that WIMAX will sustain 70 Mbps transmission rates at approximately 30 miles. C. WIMAX stands for Worldwide Internet for Microwave Access. It is based on IEEE 802.16 standards, or Broadband Wireless Access. An acceptable rule of thumb is that WIMAX will sustain 70 Mbps transmission rates at approximately 15 miles. D. WIMAX stands for Worldwide Interoperability for Microwave Access. It is based on IEEE 802.16 standards, or Broadband Wire- less Access. An acceptable rule of thumb is that WIMAX will sustain 70 Mbps transmission rates at approximately 30 miles. Correct answer and explanation: D. WIMAX stands for Worldwide Interoperability for Microwave Access. It is based on IEEE 802.16 standards or Broadband Wireless Access. An acceptable rule of thumb is that WIMAX will sustain 70 Mbps transmission rates at approximately 30 miles. Incorrect answers and explanations: A. WIMAX does not stand for WWW Interoperability for Microwave Access. WIMAX will sustain 70 Mbps Appendix C 714 transmission rates at approximately 30 miles not 15 miles. B. WIMAX is based on IEEE 802.16 standards not 802.11. C. WIMAX does not stand for Worldwide Internet for Microwave Access. WIMAX will sustain 70 Mbps transmission rates at approximately 30 miles, not 15 miles. What is Figure 8.9 depicting? Choose the best answer.14. A. WIMAX similar network B. Satellite-based network C. Wireless Wide Area Network D. Wide Area Network technology Correct answers and explanations: B and D. B. Satellite-based network is depicted in Figure 8.24. D. Wide Area Network technology is how sat- ellite-based networks are categorized; therefore, this is also a depiction of a wide area network technology. A and C. A. An acceptable rule of thumb is that WIMAX will sustain 70 Mbps transmission rates at approximately 30 miles. C. Wireless Wide Area Networks (WWAN) are network traf- fic encapsulated in mobile communications technology such as WIMAX, UMTS, CDMA2000, or 3G networks to name just a few. How far do LEOs and MEOs orbit above the earth?15. A. LEOs 1,800 to 2,000 miles; MEOs 1,800 to 2,000 miles B. LEOs 1,800 to 2,000 miles; MEOs 2,000 to 10,000 miles C. LEOs 1,800 to 2,000 miles; MEOs 9,000 to 10,000 miles D. LEOs 9,000 to 10,000 miles; MEOs 9,000 to 10,000 miles FIGurE 8.9 Appendix C 715 Correct answer and explanation: C. LEOs are primarily used with Internet- based satellite communications and are typically located approximately 1,800 to 2,000 miles above Earth. MEOs orbit at approximately 9,000 to 10,000 miles above Earth. Incorrect answers and explanations: A, B, and D. A. LEOs and MEOs do not orbit at the same distance from the Earth. B. MEOs orbit at approxi- mately 9,000 to 10,000 miles above Earth. D. LEOs and MEOs do not orbit at the same distance from the Earth. ChApTEr 9: SECurITy STANdArdS ANd SErvICES You are acting as a security consultant for a company wanting to de-1. crease their security risks. As part of your role, they have asked that you develop a security policy that they can publish to their employ- ees. This security policy is intended to explain the new security rules and define what is acceptable and not acceptable from a security standpoint as well as defining the method by which users can gain access to IT resources. What element of AAA is this policy a part of? A. Authentication B. Authorization C. Access Control D. Auditing Correct answer and explanation: C. Access control is defined as a policy, software component, or hardware component that is used to grant or deny access to a resource. Because this policy is defining how to access resources, it is considered part of access control. Incorrect answers and explanations: Answer A is incorrect because this type of written policy is not part of the authentication process although they may explain the authentication as part of the policy. Answer B is incorrect because this type of written policy is not part of the authorization process. In addition, authorization is not included in the acronym AAA per CompTIA’s definition. Answer D is incorrect because this type of written policy is not part of the auditing process. One of the goals of AAA is to provide CIA. A valid user has en-2. tered their ID and password, and has been authenticated to access network resources. When they attempt to access a resource on the network, the attempt returns a message stating, “The server you are attempting to access has reached its maximum number of con- nections.” Which part of CIA is being violated in this situation? . as part of the policy. Answer B is incorrect because this type of written policy is not part of the authorization process. In addition, authorization is not included in the acronym AAA per CompTIA s. access resources, it is considered part of access control. Incorrect answers and explanations: Answer A is incorrect because this type of written policy is not part of the authentication process. the method by which users can gain access to IT resources. What element of AAA is this policy a part of? A. Authentication B. Authorization C. Access Control D. Auditing Correct answer and