Nt1310 Unit 7

Code.org CSP Unit 1 Stages 11-13

Watch the corresponding videos and answer the questions below. Make sure to answer the questions for each stage within Code.org.

Stage 11 Video Guide - The Internet – Packets, Routing & Reliability

⦁ Does information always follow a fixed path on the Internet? No it takes the most efficient path and that path changes.

⦁ What is done to information to send it from one location to another on the Internet? It is broken into packets that travel across the internet and the packets take the most avaiable and efficient path and eventually all come together where they are suppose to be.

⦁ What kinds of information can be sent with IP packets? Almost any of the information sent over the internet can be sent with IP

packets.
⦁ What purpose do routers serve on the Internet in regards to packets? A router is the device that forwards the data packets between computer networks.
⦁ What is meant by the cheapest available path? The path that is the fastest and most efficient.
⦁ What does fault tolerant mean?

Fault tolerance is the property that enables a system to continue operating properly in the event of a failure.

⦁ What does TCP mean? TCP is a set of rules that governs the delivery of data over the internet or other network that uses the Internet Protocol, and sets up a connection between the sending and receiving computers.

⦁ What is TCP used for? TCP can be used as a communcations protocol in a private network but it is the basic communication language or protocol of the Internet.

Stage 12 Video Guide - The Internet – IP Addresses & DNS

⦁ What is the Internet? The Internet is a global computer network providing a variety of information and communications facilities, consisting of interconnected networks using standardized communcation protocols.

⦁ Define Protocol: A Protocol is a set of rules or procedures for transmitting data between electronic devices, such as computers. In order for ocmputers toe xchange information, there must be a preexiting agreement as to how the information will be structered and how each side will send and recieve it.

⦁ What does IP stand for and what is it used for? Internet Protocol, and it's a set of rules governing the format of data sent over the Internet or other

network.
⦁ How many bits are traditional IP address? The traditional IPv4 address is 32 bits.
⦁ What are the 4 parts of an IP address?

Two of the pairs of two represent network and host, One identifies the network an the second part indentifies the node, or host.

⦁ Why are we switching to IPv6? We are switching to IPv6 because there isnt enough IP adresses, IPv4 has around 4 billion adresses and IPv6 will have many more than that.

⦁ Define DNS: DNS or Doman Name System is the internet's system for converting alphabetic names into numeric IP adresses. For example, when a Web address or URL is typed into a browser, DNS servers return the Ip address of the Web server associated with that name.

⦁ What is a problem with DNS? There is DNS spoofing and DNS hijacking both usually done by hackers, and they could direct users to websites containing malware or a third-party search engine or just corrupt DNS data in general.

Stage 13 Video Guide - The Internet - HTTP & HTML

⦁ What does HTTP stand for and what is used for? HTTP stands for Hypertext Transfer Protocol, it is the protocol over which information is sent from a user's web browser to the website they are visiting

⦁ How does a get request work? HTTP protocol works in a client and server model like many other protocol. A web browser using which a request is initiated is called as a client and a web server software which respond's to that request is called as a

server.
⦁ What does HTML stand for and what is it used for? Hypertext Markup Language, a standardized system for tagging text files to achieve font, color, graphic, and hyperlink effects on World Wide Web pages.
⦁ How does a post request work? HTTP protocol works in a client and server model like many other protocol. A web browser using which a request is initiated is called as a client and a web server software which respond's to that request is called as a server
⦁ What is a cookie? Cookies are small files which are stored on a user's computer. they are designed to hold a modest amount of data specific to a particular client and website, and can be accessed either by the web server or the client computer.
⦁ What acronym is used for Secure Sockets and what is it used for? SSL is the acronym and it's used for transmitting private documents on the internet.
⦁ What acronym is used for Transport Layer Security and what is it used for? TLS is the acronym and it's a cryptographic protocol that provides communcations security over a computer network.