cisco ccna home lab recommendations

cisco ccna home lab recommendations.25.1.4 Supported Serial ConnectionsA typical Frame Relay connection is similar to the one shown in Figure 25.3. As can be seen from this figure, routers and CSUs/DSUs, as well as carrier switches and CSUs/DSUs, are connected using serial cables. The serial cables that can be used include EIA/TIA-232.EIA/TIA-449.EIA/TIA-530. v.35 and X.25. The connection between two CSUs/DSUs is a channelized connection, which can be a partial T1/E1 connection containing one or more time slots, a full T1/E1 connection (T1 contains 24 time slots, while E1 contains 30 time slots) or DS3 (T3 is clocked at 45 Mbit/s, while E3 is clocked at 34 Mbit/s) oFull or partial Frame Relay T1/E1 connection Frame Relay router switchSerial CableFigure 25.3 Typical Frame Relay ConnectionChapter 25 Frame Relay 681Authentication of the CSD 25.0225.2 Frame Relay TerminologyFrame Relay is much more complex than HDLC and PPP, and there are many more terms used to describe its components and operation. Table 25.1 summarizes these terms. This book discusses only the configuration of LMI; the configuration of other parameters (such as Be and BE) is beyond the scope of this book. The next few subsections discuss in more depth how Frame Relay works and the terms listed in Table 25.1.Keep the terms listed in Table 25.1 in mind. LMI is a survival mechanism used between DTEs and DCEs to confirm that they are operating properly and to avoid inadvertent deletion or disabling of VCs.