Hypertext Transfer Protocol

See http://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol

Please watch carefully the video on http://www.youtube.com/watch?v=kGOpY2J31pI. Besides documentation please
 answer the following questions:



Which request methods are used at HTTP? Which method do you use for which purpose?

 -HEAD
Asks for the response identical to the one that would correspond to a GET request, but without the response body. This is useful for retrieving meta-information written in response headers, without having to transport the entire content.



-POST
Requests that the server accept the entity enclosed in the request as a new subordinate of the web resource identified by the URI. The data POSTed might be, for example, an annotation for existing resources; a message for a bulletin board, newsgroup, mailing list, or comment thread; a block of data that is the result of submitting a web form to a data-handling process; or an item to add to a database.


-PUT
Requests that the enclosed entity be stored under the supplied URI. If the URI refers to an already existing resource, it is modified; if the URI does not point to an existing resource, then the server can create the resource with that URI.


-DELETE
Deletes the specified resource.


-TRACE
Echoes back the received request so that a client can see what (if any) changes or additions have been made by intermediate servers.


-OPTIONS
Returns the HTTP methods that the server supports for the specified URL. This can be used to check the functionality of a web server by requesting '*' instead of a specific resource.


-CONNECT
Converts the request connection to a transparent TCP/IP tunnel, usually to facilitate SSL-encrypted communication (HTTPS) through an unencrypted HTTP proxy. See HTTP CONNECT Tunneling.


-PATCH
Applies partial modifications to a resource.
HTTP servers are required to implement at least the GET and HEAD methods and, whenever possible, also the OPTIONS method.[citation needed]

• Do GET requests modify data on the server?

No.

• When is a GET request transmitted to a server?

When you request data form a server.

• What is the difference between GET and POST requests?

At GET-Requests, you doesn't modify the server. At POST-Requests you modify, you add something to the server.

• When you log in to a server, which method is usually used?

Usually the POST-method is used,

IPv6 Neighbor Discovery in PacketTracer and Wireshark

In this lab you will find out more about IPv6 ND with PacketTracer and Wireshark. Please document as much as possible in your blog.

• View all messages from the school network regarding IPv6 ND.
• Ping eacher other and protocol the IPv6 ND messages.

Ping-command in the cmd, with the IPv6-address of the PC next to me:


Capturing in Wireshark:


We can see, that there is a protocol, named "Neighbor Solicitation" with the IPv6-address of your neighbor.