Networking 1 Lab05

Paige Piper

March 12, 2013

Objective: See what’s going on in a network using Wireshark

Equipment:

  • Computers
  • Command Prompt
  • Wireshark

Notes and Observations:

  • We “sniffed” out HTTPs,DNS’,ICMPs, ARP & DHCPs

Diagrams, flowcharts, and figures:

Image

Fig 1: A pair, request and response, ARP frames

References:

Wireshark

Questions:

What protocols are encapsulated in the DNS query?

  • UDP, IP

Which of these protocols is a transport layer protocol?

  • UDP

What protocols are encapsulated in the ICMP frame?  What do the ICMP initials mean?

  • IP, ICMP(Internet Control Message Protocol)

Approx. how many frames did it take to download the web page for HTTP?

  • 36 frames

List the different protocols that are used…

  • IP, TCP, HTTP

What protocol headers do you see, and what are three field names in each header in the first frame carrying a HTTP GET request packet?

  • IP – Defferentiated Services Field, Flags, Header checksum
  • TCP – flags, checksum, [SEQ/ACK analysis]
  • HTTP – GET/aggregator/cached/tea/center UA – Mozilla/5.0 (compatible;MSIE 9.0; windows NT 6.1; Trident/5.0)\r\n

The type of web server being accessed in the first HTTP Response frame header…

  • Nginx/0.7.67\r\n

Conclusion:

I didn’t understand this lab at all, so I can’t really conclude anything from the above information.  The only reason I was able to get these answers was all due to my partner I was working with.  I felt the lab to be really confusing and a bunch of new information that all went over my head.

Podcasts

According to the Article “How to Podcast”, a podcast is a broadcast in mp3 format.  It’s a combination of iPod (because of the popularity of the mp3 player) and broadcast: podcast.  Podcasting has become popular due to the fact that there are thousands of stations out there, for free, that you can listen to, but unlike the radio, you hear what YOU’RE interested in, not what the broadcasters feel like talking about.  Another thing that has made it more wide spread is that it’s very simple to get ahold of podcasts and create your own podcasts, so you can get your own word out.  All you need is a computer, mic, and internet access.  At that point, once you make it available, it’s as easy as downloading and listening to the mp3, whether it be on your mp3/phone or computer.

The idea of podcasts came from Adam Curry and David Winer.  Adam wanted a way for people to communicate to each other through audio, like blogs that you don’t have to read but listen to instead.  David had the “feed” technology.  Podcast feed is something you can subscribe to, to get the latest updates from your favorite stations.  If you don’t want to subscribe then you don’t have to though.  If you’d rather have it linked to the feed, then all you have to do is connect your mp3, and it will download it for you.  It’s a fast, easy, and usually free technology for people to use to either stay connected with their interests or communicate with the world.

I got all of my information from http://www.howtopodcasttutorial.com/what-is-a-podcast.htm , so if you want to dive further into podcasts, then I suggest you go to that site!

I listened to quite a few podcasts before I could pick 3 that I actually liked.  The problem was that they’d start talking and I’d lose interest real fast, and I think that would change if I had been keeping up with that certain podcast and was more engaged with it or if they’re voices didn’t sound so boring.

Photo Tips by BCphoto: I like this podcast because I’m getting more and more interested in photography, and any tips I can get are awesome.  This podcast, or at least that episode I listened to, had a video of the man speaking too.  I didn’t watch much of the video to know if there was a point to it or not though.

Rude Moose Radio:  This podcast was pretty funny, and the tones in their voices that they used and the material they talked about is what made me like it.

There were some podcasts that I thought were useful, but if I’m listening to something to learn more about an interest, I’d rather see it since I’m a visual person.  For the most part though, I don’t think I’ll start listening to podcasts.  When I’m listening to the radio, I’m driving, and I don’t usually listen to the radio to hear people talk; I listen to it to hear music, and even then, I’d rather listen to a CD or my phone.

Week 5 Overview: Networking

This week in Networking we went over our test to sort out any confusion.  We also talked about the similarities between the OSI model and the TCP/IP model.  The OSI model has 7 layers while the TCP/IP model has 4.

OSI Model

TCP/IP Model

Application

Application

Presentation

Session

Transport

Transport

Network

Internet

Data Link

Network Access

Physical

In lab we did packet sniffing with Wireshark.  I was completely confused through this whole lab and it was stressful.  The only reason I was able to get through it was because I was working with someone, or I would still be working on it.