CCNA Cisco Certified Network Associate Study Guide - FTP Server

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Routing Information Protocol (RIP) 267 R 172.16.50.0 [120/2] via 172.16.20.2, 00:00:11, Serial0 R 172.16.40.0 [120/1] via 172.16.20.2, 00:00:11, Serial0 R 172.16.30.0 [120/1] via 172.16.20.2, 00:00:11, Serial0 C 172.16.20.0 is directly connected, Serial0 C 172.16.10.0 is directly connected, Ethernet0 2501A# Notice that in the output above, the same networks are again in the routing table, and you didn’t have to put them there manually. The router output below shows the routing tables for the 2501B and 2501C routers. 2501B#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M – [output cut] Gateway of last resort is not set 172.16.0.0/24 is subnetted, 5 subnets R 172.16.50.0 [120/1] via 172.16.40.2, 00:00:26, Serial1 C 172.16.40.0 is directly connected, Serial1 C 172.16.30.0 is directly connected, Ethernet0 C 172.16.20.0 is directly connected, Serial0 R 172.16.10.0 [120/1] via 172.16.20.1, 00:00:04, Serial0 2501B# RouterC#sh ip route Codes: C - connected, S - static, I - IGRP, R - RIP, M – [output cut] Gateway of last resort is not set 172.16.0.0/24 is subnetted, 5 subnets C 172.16.50.0 is directly connected, Ethernet0 C 172.16.40.0 is directly connected, Serial0 R 172.16.30.0 [120/1] via 172.16.40.1, 00:00:06, Serial0 R 172.16.20.0 [120/1] via 172.16.40.1, 00:00:06, Serial0 R 172.16.10.0 [120/2] via 172.16.40.1, 00:00:06, Serial0 RouterC#
268 Chapter 5 � IP Routing RIP has worked well in our little internetwork. However, since this technique has a maximum hop count of only 15 hops (where 16 is deemed unreachable) and performs full routing-table updates every 30 seconds, it can cause havoc on a larger internetwork. Holding Down RIP Propagations You may not want your RIP network advertised everywhere on your LAN and WAN. For instance, there is no advantage to advertising your RIP network to the Internet. There are a few different ways to stop unwanted RIP updates from propagating across your LANs and WANs. The easiest way to do this is through the passive-interface command. This command prevents RIP update broadcasts from being sent out a defined interface, but that same interface can still receive RIP updates. The following is an example of how to configure a passive-interface on a router: RouterA#config t RouterA(config)#router rip RouterA(config-router)#network 10.0.0.0 RouterA(config-router)#passive-interface serial 0 The above command will stop RIP updates from being propagated out serial interface 0, but serial interface 0 can still receive RIP updates. Interior Gateway Routing Protocol (IGRP) Interior Gateway Routing Protocol (IGRP) is a Cisco proprietary distance-vector routing protocol. This means that all your routers must be Cisco routers to use IGRP in your network. Cisco created this routing protocol to overcome the problems associated with RIP. IGRP has a maximum hop count of 255 with a default of 100. This is helpful in larger networks and solves the problem of there being only 15 hops maximum possible in a RIP network. IGRP also uses a different metric from RIP. IGRP uses bandwidth and delay of the line by default as a metric for determining the best route to an internetwork. This is called a composite
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CCNA Cisco Certified Network Associ
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Associate Publisher: Neil Edde Cont
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This book is dedicated to all the C
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Introduction Welcome to the excitin
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Introduction xxv installing, managi
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Introduction xxvii but you still ha
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Introduction xxix To meet the CCNP
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Introduction xxxi through!) Also, b
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CCDPs must also demonstrate profici
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Introduction xxxv answering the rev
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Introduction xxxvii don’t need to
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Introduction xxxix questions and un
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Assessment Questions Assessment Que
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Assessment Questions xliii 9. Which
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Assessment Questions xlv 17. What i
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Assessment Questions xlvii 23. Whic
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Assessment Questions xlix 31. What
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Assessment Questions li 39. What ar
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Assessment Questions liii 47. Which
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Answers to the Assessment Questions
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Chapter 1 Internetworking THE CCNA
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Internetworking Models Internetwork
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The OSI Reference Model FIGURE 1.1
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FIGURE 1.3 Layer functions The OSI
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The OSI Reference Model 9 JPEG The
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The OSI Reference Model 11 Connecti
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The OSI Reference Model 13 answer t
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The OSI Reference Model 15 before s
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The OSI Reference Model 17 The rout
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The OSI Reference Model 19 For a ho
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Ethernet Networking 21 The Physical
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Ethernet Networking 23 Ethernet is
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FIGURE 1.11 802.3 and Ethernet fram
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802.2 and SNAP FIGURE 1.12 802.2 an
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Ethernet Networking 29 You can iden
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FIGURE 1.13 Data encapsulation Data
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The Cisco Three-Layer Hierarchical
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The Core Layer The Cisco Three-Laye
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Assembling and Cabling Cisco Device
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6-3 7-2 8-1 Selecting Cisco Product
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FIGURE 1.20 Cisco hub products Cisc
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Cisco Switches Selecting Cisco Prod
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Summary Key Terms Summary 51 This c
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Written Labs In this section, you w
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Lab 1.2: Defining the OSI Layers an
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Review Questions Review Questions 5
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8. How is a crossover cabled? Revie
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Review Questions 61 15. Routers can
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64 Chapter 1 � Internetworking An
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Chapter 2 Switching Technologies TH
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Layer-2 Switching 73 switches are f
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Layer-2 Switching 75 switch now has
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Loop Avoidance FIGURE 2.2 Broadcast
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Spanning-Tree Protocol (STP) Spanni
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Spanning-Tree Protocol (STP) 81 802
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Spanning-Tree Protocol (STP) 83 If
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FIGURE 2.6 Different switching mode
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Key Terms Summary 87 Before taking
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Review Questions 1. Which LAN switc
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Review Questions 91 8. What are the
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15. What is the default LAN switch
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96 Chapter 2 � Switching Technolo
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98 Chapter 2 � Switching Technolo
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The Transmission Control Protocol/I
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102 Chapter 3 � Internet Protocol
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Answers to the Written Lab 167 8. S
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Answers to Review Questions 169 12.
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In this chapter, you will be introd
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174 Chapter 4 � Configuration and
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318 Chapter 6 � Virtual LANs (VLA
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320 Chapter 6 � Virtual LANs (VLA
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Answers to Review Questions Answers
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Chapter 7 Managing a Cisco Internet
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The Internal Components of a Cisco
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Managing Configuration Registers 32
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Backing Up and Restoring the Cisco
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Using Cisco Discovery Protocol 345
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Using Telnet Using Telnet 351 Encap
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Using Telnet 353 Remember that the
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Checking Telnet Connections Using T
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Resolving Hostnames 357 This output
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Resolving Hostnames 359 To verify t
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Resolving Hostnames 361 it doesn’
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apollo Apollo echo appletalk Applet
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Key Terms Summary 365 Next, you lea
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Command Description Summary 367 no
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Written Lab Write in the answers to
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Hands-on Labs 371 flash tftp. This
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Lab 7.5: Using Telnet Hands-on Labs
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Hands-on Labs 375 4. Test your host
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Review Questions 377 5. Which memor
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13. What does the command cdp timer
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382 Chapter 7 � Managing a Cisco
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384 Chapter 7 � Managing a Cisco
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Most network administrators have, a
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388 Chapter 8 � Configuring Novel
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Answer to Review Questions Answer t
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Chapter 9 Managing Traffic with Acc
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Access Lists 441 interface. Applyin
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Access Lists 443 IP extended acces
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Access Lists 445 Now, that was the
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Access Lists 447 On the Acme router
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Access Lists 449 Once you choose th
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discard Discard (9) domain Domain N
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IPX Access Lists 453 LAN. However,
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IPX Access Lists 455 The access lis
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Router(config)#access-list 1010 per
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Key Terms Summary 459 � How to co
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Written Lab In this section, write
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Hands-on Labs 463 3. Choose an acce
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Hands-on Labs 465 5. Add the source
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Hands-on Labs 467 3. Configure an a
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Review Questions 469 4. Which of th
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Review Questions 471 10. Which of t
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Review Questions 473 18. Which acce
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Answers to Review Questions Answers
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Chapter 10 Wide Area Networking Pro
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Wide Area Networks 479 Demarcation
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High-Level Data-Link Control Protoc
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Point-to-Point Protocol (PPP) Point
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Point-to-Point Protocol (PPP) 485 A
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Point-to-Point Protocol (PPP) 487 I
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Frame Relay 489 Frame Relay provide
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Frame Relay 491 7. The CO receives
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Local Management Interface (LMI) Fr
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Frame Relay 495 out the same interf
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appletalk protocol eigrp no appleta
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Here’s an example using the Frame
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Frame Relay 501 really might need.
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Frame Relay 503 To see information
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Integrated Services Digital Network
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FIGURE 10.7 ISDN BRI reference poin
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Integrated Services Digital Network
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Dial-on-Demand Routing (DDR) 511 Th
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Dial-on-Demand Routing (DDR) 513 Th
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Optional Commands Dial-on-Demand Ro
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Summary Sho ip route Shows all rout
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Commands in This Chapter Command De
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Command Description Summary 521 sho
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Written Lab 523 13. Write the comma
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Hands-on Labs 525 3. To change the
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Hands-on Labs 527 In my seminars I
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FIGURE 10.10 ISDN lab E0 172.16.30.
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8. Configure the dialer information
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Review Questions 533 5. Regarding F
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13. Which command will list all con
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(The answers to the questions begin
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11. Config t Int bri0 Dialer string
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Answers to Review Questions 541 14.
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544 Appendix A � Practice Exam Qu
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546 Appendix A � Practice Exam 8.
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548 Appendix A � Practice Exam 18
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560 Appendix A � Practice Exam An
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The CCNA courseware for the new CCN
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570 Appendix B � Configuring the
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634 Appendix C � Commands in This
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650 Glossary A&B bit signaling Used
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652 Glossary address learning Used
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654 Glossary anycast An ATM address
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656 Glossary ATM Asynchronous Trans
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658 Glossary auxiliary port The con
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660 Glossary bridge A device for co
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662 Glossary CBR Constant Bit Rate:
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664 Glossary circuit switching Used
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666 Glossary configuration register
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668 Glossary crankback In ATM, a co
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670 Glossary DDP Datagram Delivery
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672 Glossary DSR Data Set Ready: Wh
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674 Glossary ELAN Emulated LAN: An
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676 Glossary failure domain The reg
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678 Glossary FragmentFree LAN switc
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680 Glossary helper address The uni
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682 Glossary IGP Interior Gateway P
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684 Glossary IP multicast A techniq
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686 Glossary learning bridge A brid
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688 Glossary MAC Media Access Contr
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690 Glossary MLP Multilink PPP: A t
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692 Glossary NetBEUI NetBIOS Extend
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694 Glossary NT1 network terminatio
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696 Glossary packet switch A physic
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698 Glossary poison reverse updates
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700 Glossary PVP tunneling permanen
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702 Glossary route poisoning Used b
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704 Glossary server Hardware and so
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706 Glossary span A full-duplex dig
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708 Glossary SR/TLB source-route tr
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710 Glossary subinterface One of ma
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712 Glossary TE terminal equipment:
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714 Glossary TRIP Token Ring Interf
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716 Glossary WAN wide area network:
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