CCNA question 3
answer ：C
The layered OSI reference model
Why does the data communication industry use the layered OSIRead More
what will happen ,when a collison occurs on an Ethernet lan
A jam signal informs all devices that a collision occuredRead More
what should you commit to memory about routers
Routers, by default , will not forward any broadcast orRead More
The OSI Reference Model
Application Presentation Session Transport Network Data Link Physical The OSIRead More
Possible causes of LAN traffic congestion
Too many hosts in a broadcast domain Broadcast storms MulticastingRead More