ccna worth it reddit

ccna worth it reddit.13.3 Fast Spanning Tree ProtocolWhen the 802.Id standard was developed, waiting 30.50 seconds for Layer 2 convergence was not a problem. However, in today's networks, this can create serious performance problems for networks using real-time applications such as Voice over IP (VoIP) or video. To overcome these problems, Cisco has developed dedicated bridging features PortFast (discussed earlier), UplinkFast, and BackboneFast, but the problem with these features is that they are Cisco-specific.Rapid Spanning Tree Protocol (RSTP) is an IEEE standard that is defined in 802.1W, an 802.Id extension that is capable of interoperating with 802.Id. In RSTP, there are only three port states.. Dropped.. Learning; .. Forwarding.The discard state is basically a combination of 802. Id blocking, listening, and disabling states. The next few subsections discuss some of the improvements that RSTP has made.RSTP is backward compatible with 802.Id.13.3.1 New Port Roles AddedIn RSTP, there is still a root switch, root port, and designated port, which serve the same purpose as 802.Id, but two new port types have been added to RSTP: alternate and standby ports. These two types of ports are similar to the ports that are in a blocking state in 802. An alternate port is a port that has a path to the root switch but is currently in a discarded state; a standby port is a port in a segment that can be used to go to the root switch, but has a designated port in that segment. The best way to look at these two ports is that the alternate port is the unused secondary root port and the standby port is the unused