TAILIEUCHUNG - CCNA 1 and 2 Companion Guide, Revised (Cisco Networking Academy Program) part 80

Cisco Networking Academy Program CCNA 1 and 2 Companion Guide, Revised part 80 is the Cisco approved textbook to use alongside version of the Cisco Networking Academy Program CCNA 1 and CCNA 2 web-based courses. The topics covered provide you with the necessary knowledge to begin your preparation for the CCNA certification exam (640-801, or 640-821 and 640-811) and to enter the field of network administration. | B Page 759 Tuesday May 20 2003 2 53 PM Check Your Understanding 759 12. An administrative distance of 15 indicates which of the following A. The IP address is static. B. The IP address is dynamic. C. The routing information source is relatively trustworthy. D. The routing information source is relatively untrustworthy. 13. If you just added a new LAN to your internetwork and you want to manually add the network to your routing table what command structure would you use A. router config ip route via B. router config ip route C. router config ip route via D. router config ip route using Page 760 Tuesday May 20 2003 2 53 PM Objectives Upon completion of this chapter you will be able to Describe ICMP Describe the ICMP message format Identify ICMP error message types Identify potential causes of specific ICMP error messages Identify a variety of ICMP control messages used in networks today Determine the causes for ICMP control messages Page 761 Tuesday May 20 2003 2 53 PM Chapter 17 TCP IP Error and Control Messages Now that you have learned about the router configuration process it is time to learn about Transmission Control Protocol Internet Protocol TCP IP suite error and control messages. In this chapter you learn how the Internet Control Message Protocol ICMP provides control and message functions. In addition you learn about potential causes of ICMP error messages and how to identify them. Please be sure to look at this chapter s associated e-Labs Videos and PhotoZooms that you will find on the CD-ROM accompanying this book. These CD elements are designed to supplement the material and reinforce the concepts introduced in this chapter. Functionality and Role of IP in Error Control The function of IP is to facilitate network communication between hosts. The design of IP allows for the addressing of hosts and networks. This distinguishes IP .

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