Category: Information Technology

JDK Vs .NET SDK – Nuts and Bolts

JDK JDK (V22 as of July 2024 , Java V22) is the basic developer kit for developing and running Java applications. It includes the Java compiler (javac that compiles...

Linux Server Hardening

Below is an example check list for Linux server hardening – All ports except SSH, http is blocked. On some of the servers, DNS and...

Mobile Communication Services

One of the fastest growth rates in the telecommunications industry anywhere in the world is that of mobile radio communication devices. The basic architecture of...

Digitized Phone Services (E-10B)

Olden form of phone systems involved manual exchanges which involved a great task in switching and routing of calls to various subscribers that increased network...

Early Evolution of Data Commmunication Systems

It’s helpful for data communication and IT students to understand the evolution of Data communication systems. The first phase in the evolution of data communication...

Data Communication and its basic setup

Data Communications is the function of transferring a digital signal from one digital device to another. Data transmission and data communications mean two different things....

ARP – Address Resolution Protocol

ARP or Address Resolution Protocol is used to map Internet addresses to physical addresses. Address resolution is the process of mapping Internet IP addresses into...

Weaknesses of IP address

Below are couple major weaknesses of IP addresses – A machine cannot be assigned a permanent IP address i.e. it should change when the machine...

Network & Broadcast address

Network and Broadcast address are derived from the general IP addresses and are used for specific or reserved applications. Network address refers to the IP...

Internet Addresses

Internet address refers to the unique identification or address assigned to each machine in the physical network. The basic need for assigning Internet address is...

Internet Architecture

As shown above, the Internet consists of various physical networks (Net1 … Netn) connected together as a single large network. Each network may have host...

Internetworking Concept and Architectural Model

Internetworking is the technology that makes it possible to interconnect many disparate physical networks with diverse underlying hardware technologies and make them function as a coordinated...

ARPANET Technology

ARPANET (Advanced research project agency network) is the oldest wide area packet switched network build by the DARPA (Defense advanced research project agency). Physically ARPANET...

ProNET variation – Start topology

ProNET variation as star topology is as shown below – The 3 hosts are connected logically by a ring connection and physically by a start...

ProNET 10 Token recovery

ProNET 10 token recovery is essential to handle situations of loss of token when the host want to transmit. Such token loses occur due to...

ProNET Token Ring Technology

ProNET Token ring technology is an alternative to ethernet technology and it also works fairly good speeds. It uses token ring technology- Token ring network...

Ethernet Variations

Ethernet technology started with using the costly coaxial cables. Now it is possible to carry ethernet frames over cost-effective and cheaper twisted pair cables supporting...

Ethernet Bridges

Ethernet bridge is a fast computer with two Ethernet interfaces and a fixed program that improve upon the functions of repeaters by replicating the packets,...

Ethernet addressing and frame format

Ethernet Addresses refers to the unique physical/hardware address assigned or hardcoded on to the Ethernet interface card in 48 bits machine readable form. Physical ethernet...

Collission detection and Recovery in Ethernet

Ethernet data transmission enabled by TCP/IP is a best-effort delivery method. i.e the sender is given no information about whether the data packets were received...

Ethernet Hardware and basic architecture

A cross section of a Ethernet cable is as shown below – Ethernet is typically a 10Mbps local area packet switched network technology. The cross...

LAN, WAN and MAN

WAN (Wide Area Network) connects machines over widely separated geographical locations. A WAN usually consists of various packet switches installed at various points on the...

Internetworking

Internetworking is the technology that makes it possible to interconnect many disparate physical networks with diverse underlying hardware technologies and make them function as a coordinated...

Basics setup of Mobile Communication services

One of the fastest growing telecommunication industry is obviously mobile radio communication. Below figure shows a basic architecture of such a mobile communication network –...

Digitized Telephone services

In the past, we had manual exchanges which involved a great task in switching and routing of calls to various subscribers that increased network traffic...

Evolution of Data Communication Systems

Almost all of the Data communication systems across the world evolved from Telegraph systems. Later with developments in the telephone systems, it was now possible...

Data Communication – Basic Definition and setup

Data communication is the function of transporting digital signal from one digital device to another. Data transmission and data communications means two different things. Data...

Simple HTTP log analyzer

Here is a simple light weight HTTP analyzer written in PHP. I wrote this to brush up my skills writing schedulers for a typical LAMP...

Preferred Multithreading in C# ASP.NET

Parallel execution has been one of the core techniques of programming languages that enables and stabilizes the heavy orchestrated flow of information across information management...

Software Project Size

Software Project Size is of great importance since it determines the level of management controls and the types of tools and technologies required for a...

Software Engineering then and now

Software Engineering is and will be the backbone and driving force behind the technological advancements that we enjoy and that will lead us to greater...

Importance Of Design Patterns

Design patterns in general helps you to implement standardized and efficient solutions to software design and programming problems. Design patterns are not pure inventions like...