EXPERIENTIAL LEARNING OF NETWORKING TECHNOLOGIES: Understanding TCP Flow Control and Congestion Control

2019 ◽  
Author(s):  
RAM P. RUSTAGI ◽  
VIRAJ KUMAR
Keyword(s):  
Experiential Learning ◽  
Flow Control ◽  
Congestion Control ◽  
Tcp Performance ◽  
Underlying Network ◽  
Tcp Congestion Control ◽  
Networking Technologies

In a TCP connection, the underlying network drops packets when it lacks the capacity to deliver all the packets sent by the sender to the receiver. This phenomenon is called congestion. TCP at the sender’s side will not receive acks for these dropped packets. Since TCP is a reliable protocol, the sender must retransmit all these packets. The mechanism used by TCP to deal with such situations is called TCP Congestion Control. In this article, we explain the basics of congestion control and provide experiential exercises to help understand its impact on TCP performance.

Experiential Learning of Networking Technologies: Understanding TCP Flow Control

2019 ◽  
Keyword(s):  
Operating System ◽  
Experiential Learning ◽  
Flow Control ◽  
Transport Layer ◽  
Application Layer ◽  
Tcp Performance ◽  
Client Server ◽  
Application Program ◽  
Tcp Protocol ◽  
Networking Technologies

In any TCP-based client-server communication, the application layer is implemented in the application program whereas the transport layer (i.e., TCP protocol) is implemented in the underlying operating system. TCP achieves reliability using acknowledgement packets and retransmitting any packets that are lost in the network, or corrupted, or delayed or delivered out-of-order. In addition, the TCP protocol ensures that the receiver application is not overwhelmed by data from the sender application — only the amount of data that the receiver can consume is transmitted. This is called TCP Flow Control. In this article, we explain the basics of flow control and provide experiential learning exercises to help understand its impact on TCP performance.

Experiential Learning of Networking Technologies: Understanding Web Security

2018 ◽  
Author(s):  
Ram P. Rustagi ◽  
Viraj Kumar
Keyword(s):  
Experiential Learning ◽  
Web Security ◽  
Web Based ◽  
Security Issues ◽  
Hands On ◽  
Networking Technologies

With the rapid increase in the volume of e-commerce, the security of web-based transactions is of increasing concern. A widespread but dangerously incorrect belief among web users is that all security issues are taken care of when a website uses HTTPS (secure HTTP). While HTTPS does provide security, websites are often developed and deployed in ways that make them and their users vulnerable to hackers. In this article we explore some of these vulnerabilities. We first introduce the key ideas and then provide several experiential learning exercises so that readers can understand the challenges and possible solutions to them in a hands-on manner.

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