Network Communication Modes and Topologies
Communication Modes
Simplex Mode
The transmitter sends information to the receiver only.
Half-Duplex Mode
Both sender and receiver can transmit, but not at the same time.
Full-Duplex Mode
Simultaneous two-way communication is possible.
Network Types
Transmission Type
Peer-to-Peer Networks
Two devices connect directly via a link.
Multipoint Networks
Multiple devices share a single link.
Ownership
Private and public networks.
Network Categories
Local Area Networks (LANs)
Typically confined to a single building.
Metropolitan
Read MoreComputer Hardware and Software Essentials
1. Statements about SIMM and DIMM Memory
Correct answers: b and d
2. Memory Modules Requiring Pair Installation
Correct answers: c and e
3. Graphics Card Accommodation
All options are correct.
4. Memory Operating Rate
Correct answers: b and e
5. FSB Speed
Yes, it’s the internal micro operating speed, measured in MHz.
6. Incorrect Statement about SCSI Interface
d) In most cases, no adapter card is required.
7. Content of Main Memory
c) Running programs and their data.
8. Component Part of the UC
b) The CPU
9. Components
Read MoreUnderstanding Network Topologies
1. Definition
A network topology is the physical or logical arrangement of nodes and connections within a computer network. Networks can utilize a single topology or a combination, known as a mixed topology.
2. Common Topologies
2.1 Ring Network
In a ring network, stations are connected in a closed loop. Each station connects to its neighbors, with the last connecting back to the first. Data transmission occurs sequentially, with each station acting as a relay. This topology often employs a token-passing
Read MoreSAP-1 Architecture, Microprocessors, and Computer Organization
1. SAP-1 Architecture
1.1. Overview
The Simple-As-Possible (SAP)-1 computer, explained by Albert Paul Malvino, is a basic microprocessor model. It demonstrates fundamental microprocessor operations, memory interaction, and input/output processes. Its instruction set is intentionally limited and straightforward.
1.2. Components
1.2.1. Program Counter (PC)
Counts from 0000 to 1111, signaling the memory address of the next instruction.
1.2.2. Inputs and Memory Address Register (MAR)
During execution, the
Read More8085 Microprocessor: Architecture, Instructions, and Applications
What is the 8085 Microprocessor?
The 8085 microprocessor, developed by Intel in 1976, is an 8-bit microprocessor widely used in embedded systems and small-scale computing devices. It processes data in 8-bit chunks and is a significant part of the 8-bit microprocessor family. Below is a summary of its main functional units:
Functional Units of the 8085 Microprocessor
1. Arithmetic and Logic Unit (ALU)
- Performs arithmetic operations (addition, subtraction) and logical operations (AND, OR, XOR).
- Handles
Understanding the Internet and Web Technologies
What is the Internet?
The Internet is a global network of networks, connecting computers worldwide. This connection allows us to access and display web pages through a browser and utilize various online services.
What are Hyperlinks?
Hyperlinks are elements embedded in web pages that provide quick and easy access to content on other websites.
Webmail vs. Mail User Agent
Webmail: Accesses email accounts through a web page.
Mail User Agent: Accesses email accounts through dedicated software.
System Reliability
A
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