CCNA INTRO: Introduction to Cisco Networking Technologies by Todd Lammle

By Todd Lammle

Take your first step to CCNA certification From bestselling writer Todd Lammle comes the main updated publication on CCNA examination 640-821, the 1st examination in Cisco's well known two-exam Cisco qualified community affiliate (CCNA) certification tune. comprehend networking for the small or domestic workplace marketplace, organize for the examination, and procure the abilities you would like with this accomplished advisor. within you will find: whole assurance of all examination goals in a scientific process, so that you will be convinced you are getting the guide you wish useful hands-on workouts to enhance serious abilities Real-world eventualities that exhibit you existence past the school room and positioned what you have realized within the context of tangible activity roles tough overview questions in every one bankruptcy to organize you for examination day examination necessities, a key characteristic on the finish of every bankruptcy that identifies severe parts you need to develop into expert in prior to taking examination 640-821 A convenient tear card that maps each respectable examination target to the corresponding bankruptcy within the publication, so that you can tune your examination prep target by means of aim glance inside of for whole insurance of all examination pursuits. Featured at the CD SYBEX try ENGINE: try your wisdom with complicated trying out software program. contains all bankruptcy evaluate questions and bonus checks. digital FLASHCARDS: make stronger your realizing with flashcards which can run in your computing device, Pocket computer, or Palm hand held. additionally on CD, you can find preview variations of the CCNA Video sequence and the CCNA Audio sequence from writer Todd Lammle, in addition to the complete ebook in searchable and printable PDF. learn anyplace, any time, and technique the examination with self assurance.

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Additional resources for CCNA INTRO: Introduction to Cisco Networking Technologies Study Guide: Exam 640-821

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14. D. Stub networks have only one connection to an internetwork. Only default routes can be set on a stub network or network loops may occur. See Chapter 5 for more information. 15. B. A hub is a Physical layer device. See Chapter 1 for more information. 16. B. The command show controllers s 0 tells you what type of serial connection you have. If it is a DCE, you need to provide the clock rate. See Chapter 4 for more information. 17. C. The primary reason the OSI model was created was so that different networks could interoperate.

See Chapter 1 for more information. fm Page xxviii Wednesday, September 6, 2006 9:46 AM xxviii Answers to Assessment Test 18. C. The Transport layer creates virtual circuits between hosts before transmitting any data. See Chapter 1 for more information. 19. C. User Datagram Protocol is a connection network service at the Transport layer and DHCP uses this connectionless service. See Chapter 2 for more information. 20. D. The command used to copy a configuration from a router to a TFTP host is copy flash tftp.

How many collision domains do you see here? I’m counting 10—remember that connection between the switches is considered a collision domain! Should I Just Replace All My Hubs with Switches? You’re a network administrator at a large company in San Jose. The boss comes to you and says that he got your requisition to buy a switch and is not sure about approving the expense; do you really need it? Well, if you can, sure—why not? Switches really add a lot of functionality to a network that hubs just don’t have.

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