---
title: "16-networks"
aliases: 
tags: 
- cosc203
- lecture
---

# Types of devices
- everything is connected
- ![](https://i.imgur.com/ECsSgfo.png)

- hosts - the end systems which run network apps

packet swtiches - forward packets (chunks of data)
communcation links - fiber, copper, radio, satellite
	- transmission rate: bandwidthc
networks -  collection of devices routers
- links managed by organ

# communication Medias

# Packet and circuit switching

# network protocol

# network performance metrics