new ccna how long to study

new ccna how long to study.UseProtection:noERP (Extended Rate Physical) i.e. Extended Rate Physical Layer. these devices have extended data rates. In other words. the NON.ERP is discussing 802.11b clients. If these 802.11b clients were ERPs, then the 802.11b clients would support higher data rates, making the 802.11b clients 802.11g clients°.Now, returning to Figure 6-1, there are no 802.11b clients, and the AP will tell each client that there are currently no 802.11b clients and that there is no need to use the protection mechanism now.After the 802.11b client is associated with the AP, the situation changes. In Figure 6-2, the AP informs the remaining clients of the network that the NON.ERP client appears at this time. This process is done in the beacon sent by the AP.Empty households over C802.11b (Non-ERP) Figure 6.2 802.11g Cell with 802.11b ClientSince the cell is aware of the presence of an 802.11b client, the way in which data is sent within the cell changes. When an 802.11g client sends a frame, it must first warn the 802.11b client by sending a Request to Send (RTS, RequestToSend) message at the 802.11b rate so that the 802.11b client can hear and understand5.2 Basic Topics 73In both diagrams, the outer line indicates the H-plane,and the dashed line inside indicates the E-planeo Table 5-8 lists the detailed parameters of AIR-ANT3213 end of the communication is received by the destination end. This receiving end then sends at the 802.11b rate using ClearToSend (CTS,ClearToSend) Since the AP says to use the protection mechanism, the beacon: i will send a RTS at the 802.11b Non-ERP display: yes rate using protection: yes