date: 2024-03-31
title: DCN-As-1
status: DONE
author:
- AllenYGY
tags:
- DCN
- Assignment
created: 2024-03-31T12:22
updated: 2024-04-10T18:04
publish: True
DCN-Assignment1
What is the OSI model?
There are 7 layers in the in OSI Model
There are no Session Layer and Presentation Layer in TCP/IP models
A company’s computer network is the backbone of its business as it connects all its computers and related devices, allowing staff to work more efficiently across the organization. Suppose a commercial company has about 8000 staff. As a computer officer in the company, you are required to design a computer network for that company. Note that network design involves evaluating and understanding how all the elements of the network link together and how they can be made to run as efficiently as possible. Please answer the following questions.
The CRC method is used to transmit a bit-stream of
Frame:
Message after 3 zero bits are appended:
Reminder:
Show that this error is detected at the receiver’s end.
Receive Frame:
Receive Data:
Calculate Reminder:
Position | Bit | Parity Calculation |
---|---|---|
1 | 1 | - |
2 | 0 | - |
3 | 1 | 1 + 2 |
4 | 0 | - |
5 | 1 | 1 + 4 |
6 | 0 | 2 + 4 |
7 | 1 | 1 + 2 + 4 |
8 | 0 | - |
9 | 1 | 1 + 8 |
10 | 0 | 2 + 8 |
11 | 1 | 1 + 2 + 8 |
12 | 0 | 4 + 8 |
13 | 1 | 1 + 4 + 8 |
14 | 0 | 2 + 4 + 8 |
15 | 1 | 1 + 2 + 4 + 8 |
16 | 0 | - |
17 | 0 | 1 + 16 |
1010 1010 1010 1010 0
Error correction, and error-detection, and retransmission can be used to tackle error bits in data communication. State two reasons why some applications use error correction instead of error detection and retransmission.
The Internet of Things (IoT) is doing great in many fields and services. Numerous IoT applications can ease our commercial operations. Suppose you are a project leader in a software house, and your team is required to write a proposal about IoT innovation. Please suggest what kind of application you would propose and why.
Proposal:
Why: