Explain how computing systems work.
Learning Objective:
Explain how computing devices work together in a network.
A computing device is a physical artifact that
can run a program. Some examples include
computers, tablets, servers, routers, and smart
sensors.
CSN-1.A.2
A computing system is a group of computing
devices and programs working together for a
common purpose.
CSN-1.A.3
A computer network is a group of
interconnected computing devices capable of
sending or receiving data.
CSN-1.A.4
A computer network is a type of computing
system.
CSN-1.A.5
A path between two computing devices on a
computer network (a sender and a receiver) is
a sequence of directly connected computing
devices that begins at the sender and ends at
the receiver.
CSN-1.A.6
Routing is the process of finding a path from
sender to receiver.
CSN-1.A.7 The bandwidth of a computer network is the maximum amount of data that can be sent in a fixed amount of time.
CSN-1.A.8 Bandwidth is usually measured in bits per second.
Learning Objective: Explain how data are sent through the Internet via
packets.
CSN-1.C.1
Information is passed through the Internet as
a data stream. Data streams contain chunks of
data, which are encapsulated in packets.
CSN-1.C.2
Packets contain a chunk of data and metadata
used for routing the packet between the origin
and the destination on the Internet, as well as
for data reassembly.
CSN-1.C.3
Packets may arrive at the destination in order,
out of order, or not at all.
CSN-1.C.4
IP, TCP, and UDP are common protocols used
on the Internet.
Learning Objective:
Explain how the Internet works. 
CSN-1.B.1
The Internet is a computer network
consisting of interconnected networks that
use standardized, open (nonproprietary)
communication protocols.
CSN-1.B.2
Access to the Internet depends on the ability
to connect a computing device to an Internetconnected device.
CSN-1.B.3
A protocol is an agreed-upon set of rules that
specify the behavior of a system.
CSN-1.B.4
The protocols used in the Internet are open,
which allows users to easily connect additional
computing devices to the Internet.
CSN-1.B.5
Routing on the Internet is usually dynamic; it is
not specified in advance.
CSN-1.B.6
The scalability of a system is the capacity for
the system to change in size and scale to meet
new demands.
CSN-1.B.7
The Internet was designed to be scalable.
Learning Objective: Describe the differences between the Internet and the World Wide Web.
CSN-1.D.1
The World Wide Web is a system of linked
pages, programs, and files.
CSN-1.D.2
HTTP is a protocol used by the World Wide
Web.
CSN-1.D.3
The World Wide Web uses the Internet.