200 301 ccna training

200 301 ccna training.4. fast STP ( IEEE 802.1w)As described earlier in this chapter, the IEEE defined STP in the 802.1D standard.The IEEE improved the 802.1D protocol by defining Rapid Spanning Tree Protocol (RSTP) in the 802.1 w standard.1.2 Basic Content 21RSTP(802.1w) is similar to STP(802.1D) in the following aspects.1.3 Pre-test Preparation 21Use the same parameters and rules to elect the root switch. Use the same criteria to elect the root port of a non-root switch.Use the same guidelines to elect the designated port on each LAN segment.. Each port is set to the forwarding or blocking state. although RSTP refers to the blocking state as the discarding state.RSTP can be configured in a switch together with legacy 802. IDSTP. a switch applying RSTP can support the functional features of RSTP while a switch applying legacy 802. IDSTP supports only STP.RSTP is very similar to STP and thus the first thing that might be wondered is why IEEE went to the trouble of developing RSTP. The most important reason for this is convergence. the convergence of STP consumes a relatively long time (the default setting is 50 seconds). RSTP, on the other hand, improves the convergence of the network when the network topology changes, usually taking only a few seconds to converge, and in the worse case about 10 seconds.In practice, most enterprise LAN designs require STP, and most prefer RSTP because it converges better. However, given the current exam, Cisco has deferred in-depth discussion of RSTP until the CCNP switch exam and CCNP certification. For some of you who use LAN switching at work, read about 802.1W/RSTP and how it is implemented in switches.