ccna 1 pdf notes

ccna 1 pdf notes.Frame Relay is still one of the most widely used WAN technologies today. However, its popularity is waning. Its replacement is broadly based on two categories of Virtual Private Network (VPN) technology (described in Chapter 7, "Virtual Private Networks" and Ethernet WANs, in ICNDl): InternetVPN, which uses the Internet to deliver packets; and MultiProtocol Label Switching (MPLS), which uses the Internet to deliver packets. InternetVPN; and MultiProtocolLabelSwitching (MPLS) VPNO MPLS follows the same basic service model as Frame Relay and is usually provided by the same Frame Relay provider, but with significant technical advantages.However, many companies still use Frame Relay today. Some companies still use it as a core WAN technology, and it can also be used to connect to MPLS and InternetVPN, so Frame Relay will remain an important networking topic for some time.This chapter covers the details of the Frame Relay protocol, while Chapter 14, "Implementing Frame Relay," discusses how to configure Frame Relay. The first part of this chapter focuses on the basics of Frame Relay, including many new terms. The second part takes a closer look at Frame Relay data link addressing. This topic requires attention because Frame Relay addresses are useful in both routing configuration and troubleshooting. The last major section of this chapter looks at certain network layer aspects when using Frame Relay.13.1 "Do I Know That Already?" A Mini-TestTable 13-1 Chapter Basics and Related Test QuestionsOverview of Frame Relay 1.2Frame Relay Addressing 3 and 4Network Layers Associated with Frame Relay 5 and 6Which of the following protocols is used between a Frame Relay DTE and a Frame Relay switch?a. VC b. CIR c. LMI d. Q.921