4.1 Video 1

As time evolved, computers became smaller
computers are capable of sending and recieving data
A computer system is a group of computing devices and programs working together for a joint purpose
A computer network is a group of interconnected computing devices capable of sending or recieving data, type of computing system
Packet switching: message is broken up into files and sent in any order. the packets are reassembled by reciever’s device
Routing is the process of finding a path from sender to reciever
A path between two computing devices on a computer netqork (a sender and a reciever) is a sequence of directly connected computing devices that begins at the sender and ends at the reciever
Bandwith: maximum amount of data that can be snet in a fixed amount of time on a computer network (bits/second)

4.1 Video 2

Packet: small amount of data sent over a netqork. Each packet also includes the source and destination of the Data.
protocol: agreed upon set of rules that specify the behavior of a system
Computer Protocol Methods:
OSI: open systems interconnect: layers you have to go through to communicate (7 groups of protocols)
TCP: establishes common standard for how to send messages
Network Access Layer: Setting things up in the hardware, NIC card or wire. MAC address is unique to each card. uses binary
INternet Protocol Layer (IP): Where the packets get set up with sender ip, reciever ip, metadata(contains information used for routing information).
MAC address are used to transport message from sender ip to reciever ip