Understanding Bidirectional Communication Nodes
Types of Communications
If a link between two nodes can be selected for communication in both directions (but alternatively), the link is bidirectional. If it is set in one direction and under the terms of a node, it will be one-way (incoming or outgoing).
- If a user node wants to communicate with another user and it also belongs to the node, the switching system has to make the connection of both. This communication is called local communication.
- If the user wishes to establish communication with another
Interactive Document Viewer with Annotation Features
- Internet Explorer 9+
- Google Chrome
- Firefox
- Safari
Python Programming: Examples and Tips for INFO2000 Midterm
General Python Tips:
- Loops: Use
for i in range(start, stop, step):for iteration. - Lists:
my_list = [1, 2, 3], access elements withmy_list[index]. - Dictionaries:
my_dict = {'key': 'value'}, access withmy_dict['key']. - Functions: Use
def function_name(parameters): return valueto define. - Importing Libraries: Use
import random,import math. - Printing Debugging Info: Use
print(variable). - String Manipulation:
.upper(),.lower(),.strip(),.split(),.join(). - File Handling:
open('filename.txt', 'r')to read,open(
Understanding Computer Hardware and Software Components
Understanding Computer Hardware and Software
Data is the set of scientific and technical knowledge that enables the automatic processing of information. The term comes from the union of two words, referring to computers and their components:
Hardware and Software
A computer is composed of two separate, but closely related, parts:
- Hardware: Consists of the physical elements of the computer. It’s essentially made of electronic components that provide the necessary support for the interpretation and execution
Network Database Model: Structure and DBTG CODASYL
Network Model
In the relational model, data and data relationships are presented with a series of tables. The network model is different; data is expressed through a series of records, and data relationships through links. A network database consists of a series of records that are interconnected through links.
A record is similar to an entity in the entity-relationship model. Every record is a set of fields (attributes), each of these contains only one data value. A link is an association between
Read MoreOperating System: Functions and Features
Operating System
An Operating System (OS) is a program or set of computer programs designed to ensure effective management of a computer’s resources. It starts working when the computer is turned on and manages the hardware of the machine from the most basic levels, allowing interaction with the user. An operating system can normally be found in most electronic devices that use microprocessors, such as cell phones, DVD players, car stereos, and PCs. These devices use the OS to understand the machine
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