Unit 2 Flashcards
Bandwidth
the maximum amount of data that can be sent in a fixed amount of time, usually measured in bits per second.
Computing Device
a machine that can run a program, including computers, tablets, servers, routers, and smart sensors.
Computing System:
a group of computing devices and programs working together for a common purpose.
Computing Network
a group of interconnected computing devices capable of sending or receiving data.
DNS:
a system that translates domain names to IP addresses.
Fault Tolerant
can continue to function even in the event of individual component failures. This is important because elements of complex systems like a computer network fail at unexpected times, often in groups.
HTTP:
HyperText Transfer Protocol - the protocol used for transmitting web pages over the Internet.
Internet:
a computer network consisting of interconnected networks that use standardized, open (nonproprietary) communication protocols.
Internet Protocol (IP):
a protocol for sending data across the Internet that assigns unique numbers (IP addresses) to each connected device.
IP Address:
the unique number assigned to each device on the Internet.
Packet:
a chunk of data sent over a network. Larger messages are divided into packets that may arrive at the destination in order, out-of-order, or not at all.
Packet Metadata:
data added to packets to help route them through the network and reassemble the original message.
Protocol:
an agreed-upon set of rules that specify the behavior of some system.
Redundancy
the inclusion of extra components so that a system can continue to work even if individual components fail, for example, by having more than one path between any two connected devices in a network.
Router:
a type of computer that forwards data across a network.
Routing:
the process of finding a path from sender to receiver.
Server:
a computer that awaits and responds to requests for data.
TCP
a protocol for sending packets that does error-checking to ensure all packets are received and properly ordered.
UDP:
a protocol used on the internet for fast transmission of information but with minimal error checking.
URL:
an easy-to-remember address for calling a web page.
World Wide Web:
a system of linked pages, programs and files.
IPV4 bits
32
IPV6
128
what does IP do
Ip allows us to communicate with everyone because we are all using the same protocol
TCP vs UDP:
Use udp for when accuracy doesn’t matter (some packets are lost)
Sends it in bunches, all the information there as quick as possible
TCP for very accurate bunches and no packet loss
INTERNET VS WWW
www are files, web pages, and media
The internet is the network we use to access those files
