TCP Congestion Control Mechanism


Let us first define what is congestion? Congestion in terms of networking , congestion is network state on a node or a link when it carries much greater data than its capacity which results in reduction of quality of service,queuing delay,frame or packet loss and blocking new connections. In a congested network, response time slows... Continue Reading →

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Differentiated Service (DiffServ) Tutorial


Differentiated Service (DiffServ) drawback of IntServ or the motivation for DiffServ The IntServ was the first step towards QoS in the internet. However IntServ model requires a router to keep flow specific state for each that the router is maintaining. This requirement raised concerns such as amount of information increases proportional to per flow which... Continue Reading →

Integrated Service & IntServ Model Tutorial


Q : What is integrated service (intServ) ? also explain the IETF IntServ Model.   Ans:  Traditionally the internet has provided the best effort service to every user regardless of its requirements. Because every user required same amount of the resources, congestion in the network can result in serious degradation of the applications that require... Continue Reading →

What is a Network Firewall?


Well, along with final year project , reading some Islamic books, I am also touching a book name "CISCO NETWORK SECURITY By James Pike".  As I am going through this book , learning so many things about the network security issues , challenges, counter measures and so on . Specially related to the equipment by... Continue Reading →

DHCP | Dynamic Host Configuration Protocol |


Dynamic Host Configuration Protocol (DHCP). Dynamic Host Configuration Protocol (DHCP) is a communications protocol enabling network administrators manage centrally and to automate the assignment of IP addresses in a network. In an IP network, each device connecting to the Internet needs a unique IP address. DHCP lets a network administrator supervise and distribute IP addresses... Continue Reading →

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