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AP Computer Science Principles Vocab 2
Terms in this set (24)
Internet Engineering Task Force - develops and promotes voluntary Internet standards and protocols, in particular the standards that comprise the Internet protocol suite (TCP/IP).
A group of computers and servers that are connected to each other
the principle that all Internet traffic should be treated equally by Internet Service Providers.
A number assigned to any item that is connected to the Internet.
Written in dotted decimal form: 8 bits.8bits.8bits.8bits = 32 bits for an IP Address.
128 64 32 16 8 4 2 1 . 128 64 32 16 8 4 2 1 . 128 64 32 16 8 4 2 1 . 128 64 32 16 8 4 2 1
Small chunks of information that have been carefully formed from larger chunks of information.
A set of rules governing the exchange or transmission of data between devices.
Transmission Control Protocol - provides reliable, ordered, and error-checked delivery of a stream of packets on the internet. TCP is tightly linked with IP and usually seen as TCP/IP in writing.
The service that translates URLs to IP addresses.
HyperText Transfer Protocol - the protocol used for transmitting web pages over the Internet.
An easy-to-remember address for calling a web page (like www.code.org).
Local Area Network - Small Geographical Area - Classroom, House, etc
Wide Area Network - Large Geographical Area - School District, (Many LANs), etc
Network inside your organization (compared to Internet which is outside)
How many bits are in an IPv4 address?
IP addresses are 32-bits, typically written as 4 dotted quads. e.g. 22.214.171.124
That means there are ~4 billion IP addresses for the whole world, roughly 6 billion less than there are phone numbers for the U.S.
What is the difference between IPv6 and IPv4. Why do we need IPv6?
IPv4 doesn't provide enough addresses, so IPv6 uses 128-bit addresses (which is very large, approximately the number "34" followed by 37 zeros).
What is an IP packet?
A message of data that includes information to route the message from the source to the destination computer. Also known as a datagram.
What is the difference between an IP address and an IP Packet?
An IP address is a sequence of numbers used to identify a device on an IP network. An IP packet contains an IP address AND the data intended for the machine identified by the IP address.
What is the purpose of the Domain Name System (DNS)?
The DNS stores and translates domain names to IP addresses.
Reducing information and detail to focus on essential characteristics. It is typically possibly to look at a system at many levels of abstraction, depending on how much detail is necessary to approach the challenge at hand.
A computer that awaits and responds to requests for data.
A computer that requests data stored on a server.
When you type an address into your browser, your computer is the client and it sends the request to the DNS server.
GET (HTTP Method)
Requests a specific web page or data.
POST (HTTP Method)
Submits some data for the server to accept or process.
Additional information included to help the server interpret the request.
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