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05 - DNS, IP addressing

 1. What is a 'protocol'?

  A group of teachers

  A set of networks

  A set of rules

  A group of cables

 2. To make a website available to the general public, what things in the list below would be useful to have in place? 
Requirements to create a website and make it available to the public
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1. ISP 
2. Unique URL for each website and page 
3. IP address for the device where the website is being hosted 
4.A DNS to look up the URL and find the correct IP address 
5. Somewhere to host the website 
6. Cloud services to provide alternative services.

  None of the items in the list

  1,2,3 and 6

  All of the items in the list are valid

  Just 1, 2 and 5

 3. ISP stands for "Internet Service Provider" - What is an ISP?
isp.png

  A company that fixes the internet for the government

  A piece of hardware that is attached to each computer that then connects to the internet

  A piece of software installed on every machine that connects to the internet

  A company that provides access to the internet for businesses and individuals

 4. What does URL stand for?

  Universal RAM Lock

  United Retail Loplock

  Universal Reversal Lindicator

  Uniform Resource Locator

 5. What is a URL?

  It is a physical address at which websites are stored

  None of the above

  It is the unique web address for every webpage on the internet.

  It is a software package that directs users to the internet

 6. Every single device connected to the internet has it's own unique address (a bit like your home address). What is this?
macaddress.jpg

  Physical Address

  Software Map Address

  IP Address

  MAC Address

 7. IP is short for Internet Protocol. An internet protocol is a set of rules that govern the activity on the internet and the WWW

  FALSE

  TRUE

 8. An IP addres is made up of a set of four numbers, each of which contains one to three digits, and is seperated by a dot.

  TRUE

  FALSE

 9. An IP address might look something like this: 
742.432.4323.9912

  TRUE

  FALSE

 10. Each part of the IP address is presented as a denary number ranging from 0 to 255 - unlike a MAC address which is presented in ____

  No format

  String format

  Text format

  Hex format

 11. IP address numbers may not look terribly impressive but they are the key to….

  locating internet users

  providing security to all customers

  firewalling the internet

  send and receive data over the internet

 12. IP Addresses can be either:

  logical or hardwired

  real or unreal

  physical or conceptual

  static or dynamic

 13. Static addresses are temporary and can change

  TRUE

  FALSE

 14. Dynamic IP addresses are temporary and are assigned to the device every time it accesses the internet 
Note: if you are using a dynamic IP address then your device will have a different IP address every time it joins  a network to access the internet

  TRUE

  FALSE

 15. Websites are hosted on Servers. A server is simply…

  A computer! Usually a powerful one

  A satellite dish that serves data

  A piece of powerful software

  A large router

 16. If you were searching for a specific website (e.g. www.teachhamper.com) how would you know the IP address to find the server on which the site was stored? 
For example -do you know theIP address of youtube or facebook?

  You would look it up in a large telephone directory and need to find it in order to visit the site

  You would guess

  You would ring your country's government

  That's where the DNS comes in (Domain Name System)

 17. The Domain Name System (DNS) translates web addresses into the correct IP address for the server or service that you requested. 
It means that you don't need to remember every IP address for every site on the internet!
dnsserver1.png


  True

  False

 18. DNS servers have a database of IP addresses and they are constantly updated by other DNS servers

  TRUE

  FALSE

 19. An advantage of DNS is that you have to remember the IP addresses for all websites, ensuring you have a good memory

  FALSE

  TRUE

 20. If you are not connected to a DNS server you will not be able to access any website for which there is a stored IP address
ipanddns1.png


  False

  True

 21. Are these valid as the first two steps of how the DNS works? 
1. Type in the name of the website (e.g. www.teachyourselfpython.com) 2. Your browser makes contact with a DNS server. The server contains a database that matches the domain name up  with its registered IP address.

  FALSE

  TRUE

 22. In the following web page URL, http is the protocol and www.testandtrack.io is the ?? 
http://www.testandtrack.io

  the requested web page located in the protocol

  the requested folder that is in the ISP

  All of the above are valid options

  domain name stored on a DNS

 23. Name servers are used to: 
DNS is the main system over the internet that uses the name server. If you set 
up your own website and use hosting, you will come across both DNS and 
name servers when you are setting up your domain name.

  name each website on the internet with an ASCII code

  host and match website addresses to IP addresses

  provide each URL or website on the internet with a unique set of hexadecimal numbers

  host the name of the company that has created the site

 24. Every website has a URL with ?.

  a unique ASCII code

  an equivalent IP address

  a name server attached to its protocol

  a unique protocol starting with 'www'

 25. A DNS is an internet service that translates alphabetic names into IP addresses

  TRUE

  FALSE


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