Spanning-Tree, VTP, Wireless Netwrok. Basic Summary

1. STP, VTP, WIRELESS SUMMARY<br />Store-forward: when the switch receives the frame, it stores the data in buffers until the complete frame has been received.<br />Cut through; the switch buffers just enough of the frame to read the destination mac address so that it determines which port to forward the data to.<br />Fragment-free: the switch stores the first 64 bytes of the frame before forwarding. Collisions and errors ocurrs mostly in the first 64 bytes.QoS: is the classification and prioritized of traffic on the network. Also is a control mechanism that provides the capability of a network to provide better service to selected network traffic over various technologies.<br />VTP: cisco protocol allow a network manager to configure a switch so that it will propagate vlan configurations to other switches in the network. Modes: Server: vtp servers advertise the vtp domain vlan information to other vtp-enabled switches in the same vtp domain.Client : vtp client receives the vlan information from the vtp servers. In this mode, is not possible to create, renamed or delete vlans.transparent: switches forward vtp advertisements to vtp clients and vtp servers. Vlans that are created, renamed or delte on this mode are local to that switch only.<br />VTP Pruning: vtp mode that prevents unnecessary flooding of broadcast information from one vlan across all trunks in a vtp domain.<br />Sticky learning: is a config. On an interface that converts all the dynamic secure mac address, including those that were dynamically learned before sticky learning was enabled, to sticky secure mac addresses and adds all sticky secure mac addresses to the run conf.<br />STP: protocol that ensures that only one logical path exists between all destinations on the network by intentionally blocking redundant paths that could cause a loop.<br />Root Brdige: switch with the lowest BID, that serves as a reference point for all ST calculations to determine which redundant paths to block.<br />Root Port: switch port closest to the root bridge. The unique port on a nonroot bridge that has the lowest cost to the root bridge. The root port is used for communication between the switch and the root bridge.<br />Designated port: all non root ports that are permitted to forward traffic on the netwrk.<br />Nonroot port: all ports on an stp network dynamically configured to be in a blocking state to prevent loops.<br />BPDU: spanning tree protocol Ethernet frame that is sent out regular intervals to exchange info among bridges in the netwrk relating to stp topology to determine the root brige and paths to the root bridge.<br />IBSS: ieee802.11 standard that refers to an ad hoc network. Wireless networks can operate without ap creating an ad hoc top.<br />BSS: basic service set. Group od stations that communicate with each other. Single wlan.<br />ESS: two or more service sets are connected by a common distribution system.<br />