Progress over Perfection

Posts in category Computer Network

Basic Networking Commands

Basic Networking Commands

Ping (Packet Internet Gopher) Pinging an IP address or website can help you to determine if the network card can communicate within the local network or outside network. Windows command line and MS-DOS users:   At the prompt type the below command containing domain name or IP address of the computer you want to ping. Ping […]

How Email is Sent: SMTP and POP3/IMAp...

How Email is Sent: SMTP and POP3/IMAp4

Email is based around the use of electronic mailboxes. When an email is sent, the message is routed from server to server, all the way to the recipient’s email server. Today almost everyone has at least one email account. Clicking on the email send button and delivery of an email message contains a lot of […]

Managing network Devices: SNMP

Managing network Devices: SNMP

SNMP is the most widely used and popular protocol for managing, monitoring and controlling of network devices like routers, switches over a public or private network. SNMP provides a framework for managing devices using TCP/IP Protocol suit. SNMP uses the concept of manager and agent For a network there may be few managers and set of […]

RSA: Algorithm and Implementation

RSA: Algorithm and Implementation

Here first of all we introduce about RSA Security and algorithm with example.  And then we will show you the implementation of  RSA algorithm in java. Types of Encryption There are mainly two types of encryption: Asymmetric encryption also called Public-Key Cryptography Symmetric encryption also called Private-Key Cryptography

Echo Server handling Multiple Client

Echo Server handling Multiple Client

The Finite State diagram for echo server handling multiple client is given below.

UDP: User Datagram Protocol

UDP: User Datagram Protocol

Introduction of UDP Think UDP working as communication by letter. LETTER UDP 1. You write a letter ———————> data 2. Put the letter inside an envelope ——–> UDP packet 3. Address the envelope ——————–> Remote address (remote IP + remote Port no.) (To, The Director, IIT-Gandhinager, pin.- 382424) 4. Put the return address on the envelope […]

Fields of IP header that changes from...

Fields of IP header that changes from router to router

Forwarding of a packet: Router to Router A router can perform some different things with a packet when it forwards it. It changes the TTL (time-to-live) and Checksum fields ( other fields may also change under different circumstances discussed below). A router is just supposed to decrement the TTL, recalculates the checksum and send the […]

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