Introduction to networking: Basics exam questions with latest update

What did early telephone operators do? - Answers-Connected pairs of wires to allow people to talk How long might a message be stored in an intermediate computer for a store-and-forward network? - Answers-Several hours What is a packet? - Answers-A portion of a larger message that is sent across a network What is a router? - Answers--Interface Message Processors (IMPs) -Special purpose computers that specialised in moving packets towards their ultimate destination In addition to breaking large messages into smaller segments to be sent, what else was needed to properly route each message segment? - Answers--Source address -Destination address -An offset of where the packet belongs relative to the beginning of the message Why is it virtually free to send messages around the world using the Internet? - Answers-Because so many people share all the resources What is a hop? - Answers-A single physical network connection. State the stack order of the TCP/IP model from the top down - Answers-Application, transport, inter-network, link what is the link later responsible for? - Answers--Connecting your PC to its LAN and moving data across a single hop -Insuring that WiFi is fairly shared across multiple compute what does CSMA/CD stand for? - Answers-Carrier Sense Multiple Access with Collision Detection what is the CSMA concept? - Answers-listen transmit if(collision detected) { wait for random amount of time; transmit } else { keep transmitting