CCNA Cisco Certified Network Associate Study Guide - FTP Server

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488 Chapter 10 � Wide Area Networking Protocols Frame Relay 0 output buffer failures, 0 output buffers swapped out 21 carrier transitions DCD=up DSR=up DTR=up RTS=up CTS=up RouterA# Notice that the fifth line lists encapsulation as PPP, and the sixth line tells us that LCP is open. Remember that LCP’s job is to build and maintain connections. The eighth line tells us that IPCP, CDPCP, and ATCP are open. This shows the IP, CDP, and AppleTalk support from NCP. The seventh line reports that we are listening for IPXCP. You can verify the PPP authentication configuration by using the debug ppp authentication command. Recently, the high-performance WAN encapsulation method known as Frame Relay has become one of the most popular technologies in use. It operates at the Physical and Data Link layers of the OSI reference model and was originally designed for use across Integrated Services Digital Network (ISDN) interfaces. But today, Frame Relay is used over a variety of other network interfaces. Cisco Frame Relay supports the following protocols: � IP � DECnet � AppleTalk � Xerox Network Service (XNS) � Novell IPX � Connectionless Network Service (CLNS) � International Organization for Standards (ISO) � Banyan Vines � Transparent bridging
Frame Relay 489 Frame Relay provides a communications interface between DTE (Data Terminal Equipment) and DCE (Data Circuit-Terminating Equipment, such as packet switches) devices. DTE consists of terminals, PCs, routers, and bridges—customer-owned end-node and internetworking devices. DCE consists of carrier-owned internetworking devices. Popular opinion maintains that Frame Relay is more efficient and faster than X.25 because it assumes error checking will be done through higherlayer protocols and application services. Frame Relay provides connection-oriented, Data Link layer communication via virtual circuits just as X.25 does. These virtual circuits are logical connections created between two DTEs across a packet-switched network, which is identified by a DLCI, or Data Link Connection Identifier. (We’ll get to DLCIs in a bit.) Also, like X.25, Frame Relay uses both PVCs (Permanent Virtual Circuits) and SVCs (Switched Virtual Circuits), although most Frame Relay networks use only PVCs. This virtual circuit provides the complete path to the destination network prior to the sending of the first frame. Frame Relay Terminology To understand the terminology used in Frame Relay networks, first you need to know how the technology works. Figure 10.4 is labeled with the various terms used to describe different parts of a Frame Relay network. FIGURE 10.4 Frame Relay technology and terms CSU/DSU Demarc Demarc CSU/DSU Router DLCI 16 Hub or switch Frame actually transverses this. CO PVC Routers see this Router DLCI 17 Hub or switch User Server Users only see this.
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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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Routing This chapter will discuss t
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238 Chapter 5 � IP Routing In our
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240 Chapter 5 � IP Routing router
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242 Chapter 5 � IP Routing Figure
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244 Chapter 5 � IP Routing 2501A(
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246 Chapter 5 � IP Routing 2501C(
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248 Chapter 5 � IP Routing 2621A
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252 Chapter 5 � IP Routing 2501C(
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254 Chapter 5 � IP Routing To con
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256 Chapter 5 � IP Routing exampl
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258 Chapter 5 � IP Routing Howeve
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260 Chapter 5 � IP Routing Routin
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262 Chapter 5 � IP Routing When a
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266 Chapter 5 � IP Routing It is
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268 Chapter 5 � IP Routing RIP ha
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270 Chapter 5 � IP Routing varian
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272 Chapter 5 � IP Routing 2501B
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274 Chapter 5 � IP Routing The fo
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276 Chapter 5 � IP Routing The Sh
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278 Chapter 5 � IP Routing The De
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280 Chapter 5 � IP Routing 07:13:
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282 Chapter 5 � IP Routing Comman
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284 Chapter 5 � IP Routing Writte
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286 Chapter 5 � IP Routing 2621(c
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288 Chapter 5 � IP Routing 2. Aft
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290 Chapter 5 � IP Routing weight
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292 Chapter 5 � IP Routing 5. Wha
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294 Chapter 5 � IP Routing 13. Wh
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296 Chapter 5 � IP Routing Answer
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298 Chapter 5 � IP Routing 13. C.
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Virtual LANs A Virtual Local Area N
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302 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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Page 473 and 474: Answer to Review Questions Answer t
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Page 477 and 478: Access Lists 441 interface. Applyin
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Page 503 and 504: Hands-on Labs 467 3. Configure an a
Page 505 and 506: Review Questions 469 4. Which of th
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Page 509 and 510: Review Questions 473 18. Which acce
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Page 515 and 516: Wide Area Networks 479 Demarcation
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Page 539 and 540: Frame Relay 503 To see information
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Page 547 and 548: Dial-on-Demand Routing (DDR) 511 Th
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Page 551 and 552: Optional Commands Dial-on-Demand Ro
Page 553 and 554: Summary Sho ip route Shows all rout
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Page 557 and 558: Command Description Summary 521 sho
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Page 565 and 566: FIGURE 10.10 ISDN lab E0 172.16.30.
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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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