Devices
Connects multiple devices in a LAN and sends data only to the intended device.
What is a switch?
A smaller unit of data that carries information across a network.
What are packets?
Protocol that checks for missing packets and correct order
What is TCP?
A unique number that identifies a device on a network.
What is an IP address?
This was the first large-scale network, funded by the U.S. government to connect research computers.
What is ARPANET?
Connects your network to the internet and directs traffice using IP addresses
What is a router?
Packets can travel _______ routes to the same destination
Protocol used when speed matters more than perfect accuracy
What is UDP?
DNS replaced hard-to-remember IP numbers with easy website names like google.com.
What is Domain Name System?
ARPANET’s first “killer app” that made the @ symbol extremely useful.
What is email?
Older device that sends data to all devices, often causing congestion
What is a hub?
Each packet contains an identifying "header" revealing which part of the larger message it represents
What is a smart header?
Created a standard language that let different networks connect, forming the modern internet.
What is TCP/IP?
In this year, the World Wide Web went public.
What is 1991?
In 1969, this many computers were connected.
What are four computers?
Extends Wi-Fi by connecting a router using an Ethernet cable
What is a Wireless Access Point (WAP/AP)?
Mathematical verification schemes ensure no data gets lost in transit
What is error checking?
Video calls and gaming often use this because it is faster
What is UDP?
Having multiple pathways for data to travel if one path fails
What is redundancy?
In the early 1900s, Telephone networks with these.
What are human operators?
Connects your home network to your ISP's service so the Internet can come in
What is a modem?
The key idea from ARPANET that avoids “one dedicated line” communication.
What is packet switching?
In 1983, the birth of the modern internet happened because of this
What is TCP/IP?
When a system keeps working even if parts fail.
What is fault tolerance?
When this launched, it transformed social media.