Need the detail answer, rather than seraching some information on the webstite!

Question

Need the detail answer, rather than seraching some information on the webstite!


1. Is this a unicast, multicast, or broadcast packet? What is the difference?

2. Using information from the packet what brand of network card in on the host? What is the MAC address of your virtual machine's network card and that of the host?

3.
Download the capture april.cap from our Blackboard site to your virtual machine and open the file with Wireshark. (no need to save the ping capture). This is a capture of me accessing a website.

At which packet did the access start? How do you know this?


4. Is this a unicast, multicast, or broadcast packet? What is the size of the packet?


5. What website am I accessing? What type of server is housing this site (IIS/Apache, Windows/*nix)?

6. When (date/time) was the site access? What browser/OS am I using?


7. Bonus: Did I authenticate into this site? What is my username? My password? Explain.

Explanation / Answer

Broadcast is when a single device is transmitting a message to all other devices in a given address range. This broadcast could reach all hosts on the subnet, all subnets, or all hosts on all subnets. Broadcast packets have the host (and/or subnet) portion of the address set to all ones. By design, most modern routers will block IP broadcast traffic and restrict it to the local subnet.

Multicast is a special protocol for use with IP. Multicast enables a single device to communicate with a specific set of hosts, not defined by any standard IP address and mask combination. This allows for communication that resembles a conference call. Anyone from anywhere can join the conference, and everyone at the conference hears what the speaker has to say. The speaker's message isn't broadcasted everywhere, but only to those in the conference call itself. A special set of addresses is used for multicast communication.

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