quartz/content/notes/cosc203-lab19.md
2022-09-22 22:05:33 +12:00

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---
title: "cosc203-lab19"
aliases:
tags:
- cosc203
- lab
---
1. DNS request protocol is UDP
![](https://i.imgur.com/dSOSdRK.png)
2. The ports of the DNS queries are:
1. dest of query: 53 ![](https://i.imgur.com/FoAwUQV.png)
2. source of response: 53 ![](https://i.imgur.com/knH3W2I.png)
3. There were 12 dns queries. They were all type A![](https://i.imgur.com/nFGVbI7.png) ![](https://i.imgur.com/uKkUuFG.png)
4. Anwers within responses
1. 2 answers ![](https://i.imgur.com/plLag5j.png)
2. 3 ![](https://i.imgur.com/5AKS2tn.png)
3. 1 ![](https://i.imgur.com/srCM9oq.png)
4. 1 ![](https://i.imgur.com/lALFEjL.png)
5. 7 ![](https://i.imgur.com/OXFBaOy.png)
6. 6 ![](https://i.imgur.com/MHOIR2B.png)
5. dns responses after nslookup on www.otago.ac.nz
1. ![](https://i.imgur.com/PRKiVlq.png)
2. ![](https://i.imgur.com/d1P36MI.png)
3. ![](https://i.imgur.com/drMqoQG.png)
4. ![](https://i.imgur.com/gprPSoO.png)
5. ![](https://i.imgur.com/u3Imagz.png)
6. ![](https://i.imgur.com/M1ZFhwF.png)
7. ![](https://i.imgur.com/bgVmCub.png)
8. ![](https://i.imgur.com/eiHDN1m.png)
9. ![](https://i.imgur.com/7A5aHYe.png)
6. destination is 10.64.0.112. this is one of my local dns servers ![](https://i.imgur.com/lz8MBcI.png) ![](https://i.imgur.com/xIaz0vH.png)
7. name servers are
1. ![](https://i.imgur.com/EQqLyDa.png)
2. ![](https://i.imgur.com/Xq4FHUr.png)
3. ![](https://i.imgur.com/v2gcibe.png)
8. nslookup google
1. 7 queries
2. 10.64.0.112 (local dns server) and 216.239.34.10 (the address of the google ns2 nameserver)
9. only one answer (two of the requests were refused and has no answer). each one contains a dns record
10.