i have somequestions and i would appreciate it if someone can help me with it
1- regarding the half duplex nature of WiFi, let say the practical throughput of a 802.11g network is 20mbps. can i use the whole bandwidth to send or receive or the bandwidth is divided into 2 independent portion ? to be more clear .... can i send at 20mbps or receive at 20mbps? or i only use 10mbps to receive and the other 10mbps is reserved for sending
2- in WiFi, the channel can only be used by a single user, this means that if you want to send something you have to wait. why don't we see this in real world? or it happens so fast we don't feel like waiting
3- there is a Meraki AP(triple radio 2x2 900 mbps throughput, with a fast-ethernet (10/100) port, is that normal ?? i mean shouldn't the 10/100 port cause a throughput bottle neck ?
you get whatever speed you get in both directions. if you get 20 mbps out, you get 20 mbps back. you can't split that up. the radios would haqve to negotiate my turn / your turn, which would slow things down.
data is broken up into small packets, the packets are sent and received. or not. if a packet is not received the sender resends. the receiving end sorts the packets into proper order and reassembles them. this is a jumbled and chaotic process. many users can use the system at the same time because all this disassemble and reassemble and my packet / your packet / his packet / her packet happens very fast, and it looks like one smooth continuous process to the end user
throughput includes overhead. extra stuff added by the wireless system to control the flow of traffic.