Preview

06 - URL and internetworking

 1. Web pages are identified by _________________

  DNS server addresses

  IP Protocols (IPPs)

  IPS Names

  Universal Resource Locators (URL).

 2. URLs usually have the form:……………..

  /.://

  None of the above

  :///.

  .:///

 3. The part of the URL is usually ___________ which was specially designed for the web page retrieval. However, others are possible – for example FTP

  HTTP or HTTPS

  SMTAP

  WWW

  Email

 4. The is the ………………….on which the WWW server is running. This will have to be mapped to an IP address via DNS before the TCP connection can be set up.

  IPS Name

  Email part of the URL

  name of the host

  HTTPS part of the URL

 5. The in the URL locates the page within the server system’s file system

  TRUE

  FALSE

 6. HTML pages usually contain links to other pages. Links are simply ……….

  None of the above

  whole web pages contained inside URL tags

  HTML tags that are contained inside URLs

  URLs contained in HTML tags

 7. Pages often contain images. The image files are specified by URLs contained in the HTML.
 Each image must be retrieved using a separate TCP
connection. Typically these run in parallel.

  TRUE

  FALSE

 8. Different protocols (remember, protocols form the first part of a URL) include:

  HTTP

  FTP

  HTTPS

  All of the above

 9. Communication between different networks in an internetwork is facilitated by entities called _____________--

  FTP servers

  ISP servers

  gateways

  bridge hubs

 10. Gateways essentially interface between two networks that have different characteristics and move packets between them.

  TRUE

  FALSE

 11. Read the excerpt and points below that describe what happens when you type a URL in. Fill in the blanks
When you type a URL into a web browser, this is what happens:
==============================================================
If the URL contains a domain name, the browser first .....................
.........................................................................
.........................................................................?

The web browser connects to the web server and sends an HTTP request 
(via the protocol stack) for the desired web page.

The web server receives the request and checks for the desired page. 
If the page exists, the web server sends it. If the server cannot find the requested page,
 it will send an HTTP 404 error message. (404 means 'Page Not Found' as anyone who has surfed the web probably knows.)

The web browser receives the page back and the connection is closed.

The browser then parses through the page and looks for other page elements it 
needs to complete the web page. These usually include images, applets, etc.

For each element needed, the browser makes additional connections and HTTP 
requests to the server for each element.

When the browser has finished loading all images, applets, etc. 
the page will be completely loaded in the browser window.

  ISP servers

  FTP servers

  connects to the ISP to look up the MAC address map

  connects to a domain name server and retrieves the corresponding IP address for the web server.

 12. Connect multiple networks of one or more organizations into a large, uniform communication system. The resulting system is called an internetwork or internet.

  TRUE

  FALSE

 13. The Internet is the specific global internetwork that grew out of ARPA-NET for communication of between computer located anywhere in the world

  TRUE

  FALSE

 14. What is the relationship between the Internet and the WWW?

  None of the above

  They are the same thing - the names are used interchangeably

  The Internet is one of the services offered by the WWW

  The WWW is one service of many offered by the Internet

 15. What is the relationship between HTTP and HTML?

  HTTP is the scripting language and protocol where as HTML is the page itself

  HTTP is the protocol to transfer web pages and HTML is the scripting language that displays web pages

  HTTP is the scripting langauge and HTML is the Mark up language

  None of the above

 16. A URL is essentially….

  the IP Addresses physical location on the DNS server

  The protocol that is responsible for the internet

  the location of a specific website, page or file on the internet

  the server of the IP Address

 17. The domain name in a URL (e.g. testandtrack (in www.testandtrack.io) is the identifier for a specific site and is made up of two parts:

  None of the above

  The name of the website and the HTTP or HTTPs

  The HTTP part and the number (which is the IP address)

  The name of the website and the top-level domain (TLD) (that is the .com, .io, .co.uk etc) which is at the end of the domain name.

 18. On a LAN for two networked devices to communicate with each other, it would be essential for them to have a …..

  IP Address

  DNS Address

  MAC Address

  Postal Address

 19. In an inter-network there is the _______________ to help resolve hostnames into IP addresses.

  IPS (Internet Protocol Service)

  None of the above

  HTML Service

  Domain Name Service (DNS)

 20. The internetworking problem is as follows: Design a scalable network infrastructure that interconnects different smaller networks, to enable packets to be sent between hosts across networks of very different performance characteristics.

  TRUE

  FALSE