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Month: February 2018

IPv4 Header

February 27, 2018 admin Leave a comment

An IP packet (Datagram) consists of  a header and a payload. The header size for IPv4 is variable( it’s size…

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Posted in: Basics

How is the TCP connection established?

February 25, 2018 admin Leave a comment

Most of the application layer protocols (like HTTP, telnet, SMTP etc.) use TCP as a transport protocol. TCP establishes a…

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Posted in: Basics

How traceroute works?

admin 2d Comments

Traceroute is one of the most used network diagnostic tool used to display the hops(routers)  through which a packet travels…

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Posted in: Basics

How does the IP Fragmentation occur?

admin 1 Comment

First of all, we need to understand why IP fragmentation occurs. Well, Let’s take a look at the below picture.…

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Posted in: Basics

HSRP

February 22, 2018 admin Leave a comment

HSRP(Hot Standby Router Protocol) is a Cisco Proprietary First-Hop Redundancy Protocol (FHRP) which is used to maintain a fault tolerant default…

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Posted in: Switching

Speed and Duplex Mismatch issues

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There are two parameters of an interface that could cause a lot of network performance related issues if not handled…

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Posted in: Switching

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