2.2 Without routing on the network, every workstation would send its packets to every other work station. The extra traffic requires larger pipes. Also each packet on a network interrupts each computer on the network whether it is intended for that computer or not and thereby degrades the computing power of every computer on the net. Note that switches also help to contain traffic within physical domains. 2.3 Another phenomenon about various network protocols is that the systems chat between themselves to inform each other of their network reachability in addition to any application level traffic that passes between the computers.
Some protocols are more chatty than others.
Each network protocol has certain unique traits that make if more or less desirable on a large enterprise network. Most business have less than 50 employees and therefore the marketplace has fostered protocols designed for small networks that do not scale well to a large campus network like FSU where we have approximately 12,000 devices communicating across the local network. 2.5 SNA has unique timing constraints with its implementation. A packet must travel to its destination and be acknowledged within a maximum time or the link is shut down. Also since it is not routeable, the intervening routers must enable bridging, which degrades traffic efficiency.