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COMP2250 Data Communications
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What is the decimal number represented by the following binary number?
1100
What is the decimal number represented by the following binary number?
01101001
Among the application layer architectures we studied in COMP2250, which one do you think Zoom might use to support your practical classes? Explain your reasoning. (We are not asking you to know what Zoom does, just to reason about what would be a good architecture for it to use.)
YOUR ANSWER SHOULD NOT EXCEED 8 LINES OF TEXT
A message is to be delivered from a web browser to a web server.
The destination web server is www.snazzy.com.
- At Snazzy Inc the web server is being run on port 8080.
- Snazzy Inc is located in the United States and it's service provider is Verizon.
The client is at Macqaurie University.
- The tab in the web browser is given dynamic port 5362.
- Macquarie University's service provider is AARNet.
The following table show the addresses for each interface in the diagram.
| Device | Interface Name | Interface MAC Address | Interface IP Address |
| Macquarie Uni Lab PC | Int11 | 34:23:45:cb:25:a5 | 137.111.46.5 |
| Macquarie Uni Switch | 52:23:9e:81:d3:71 | ||
| Macquarie Uni Router | Int21 | 25:63:f3:a6:3e:d5 | 137.111.46.1 |
| Macquarie Uni Router | Int31 | 25:63:f3:a6:3e:d6 | 137.111.0.1 |
| AARNet Router | Int32 | 61:45:f3:da:97:1e | |
| Verizon Router | Int62 | 85:32:98:4d:ea:91 | |
| Snazzy Inc Router | Int61 | 73:63:f3:52:44:c2 | 154.65.0.1 |
| Snazzy Inc Router | Int71 | 73:63:f3:52:44:c3 | 154.65.3.1 |
| Snazzy Inc Switch | 49:23:9e:21:fa:3d | ||
| Snazzy Inc Web Server | Int81 | 63:23:45:fa:4e:3a | 154.65.3.45 |
Question: consider the response from the web server back to the client.When the response traverses Snazzy Inc's switch, crossing from Link 8 to Link 7, briefly explain what happens to the packet.Your answer should include bullet points that indicate the source and destination address at layers 2, 3, and 4 of the packet header.
YOUR ANSWER SHOULD NOT EXCEED 8 LINES OF TEXT
How many routes are possible between a source IP address and a destination IP address?
Briefly describe the relationship between sequence numbers and acknowledgement numbers during the TCP teardown process. Your answer should address the following questions:
- Will the acknowledgement number be the same as the sequence number?
- How is the sequence number chosen?
- How do the sequence numbers sent by the client compare from one packet to the next?
YOUR ANSWER SHOULD NOT EXCEED 8 LINES OF TEXT
If I have the following net mask, how many bits would you expect the network portion of the IP address to be?
11111111100000000000000000000000
On which Architecture would you expect the "server-side" to be doing most of the processes?
There are 4 categories we covered in the lecture for the type of processing that could happen in application architectures
(Presentation Logic, Application Logic, Data Access Logic, and Data Storage Logic).
If you were to be told that a client is a "thin client", where would you expect to see the application logic running?
There are 4 categories we covered in the lecture for the type of processing that could happen in application architectures
(Presentation Logic, Application Logic, Data Access Logic, and Data Storage Logic).
If you were to be told that a client is a "thick client", where would you expect to see the application logic running?