Introduction to Dynamic Routing Protocols Bưu điện Hoa Kỳ tuyến đường một số lượng lớn của các chữ cái và các gói mỗi ngày. Để làm như vậy, các máy phân loại bưu chính chạy nhanh, phân loại rất nhiều các chữ cái. Sau đó các chữ cái được đặt trong các thùng chứa chính xác và lên xe tải chính xác hoặc máy bay để đạt đến đích cuối cùng. Tuy nhiên, nếu không có một chương trình máy phân loại thư để biết được nơi thư cho mỗi mã bưu điện phải được gửi, hệ thống. | C H A P T E R Introduction to Dynamic Routing Protocols The United States Postal Service routes a huge number of letters and packages each day. To do so the postal sorting machines run fast sorting lots of letters. Then the letters are placed in the correct container and onto the correct truck or plane to reach the final destination. However if no one programs the letter-sorting machines to know where letters to each ZIP code should be sent the sorter can t do its job. Similarly Cisco routers can route many packets but if the router doesn t know any routes it can t do its job. This chapter introduces the basic concepts behind IP routing protocols and lists some of the key features of each of the IP routing protocols covered on the INTRO exam. Cisco expects CCNAs to demonstrate a comfortable understanding of the logic behind the routing of packets and the different but related logic behind routing protocols the protocols used to discover routes. To fully appreciate the nuances of routing protocols you need a thorough understanding of routing the process of forwarding packets. You might even want to review the section IP Routing and Routing Protocols 11 in Chapter 5 Fundamentals of IP for a review of routing before proceeding with this chapter. For those of you studying for the CCNA exam if you are following the reading plan outlined in the introduction you will move to the CCNA ICND Exam Certification Guide after this chapter. For those of you studying just for the INTRO exam this chapter completes the coverage of topics related to IP and IP routing. Do I Know This Already Quiz The purpose of the Do I Know This Already quiz is to help you decide whether you really need to read the entire chapter. If you already intend to read the entire chapter you do not necessarily need to answer these questions now. The eight-question quiz derived from the major sections in the Foundation Topics portion of the chapter helps you determine how to spend your limited study time. .
