MOD 1 - Networking Basics

Question 1

Name all layers

Answer 1

ATNDP, Application, Transport, Network, Data Link, Physical

A = Supporting network apps
T = process to process data transfer
N = routing datagrams from src to dest
L = data transfer between neighboring network elements
P = bits on the wire

Question 2

in packet switched networks, how do you calculate transmission time? (time for a packet to travel from src to switch to dest)

Answer 2

R = link capacity
L = packet/message size

time source to switch = dtrans = L/R

tot time source to dest = dtrans x # hops

Question 3

What is a packet switching and circuit switching?

Answer 3

packet switching = sender breaks message into smaller packets and sends them into the network. The receiver then reassembles the packet back into the
original message.

circuit-switching = pre-established reserved route for your data packets to follow from the sender to the receiver