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    By default, when you retrieve new messages from a POP3 email account, the messages are deleted from the POP3 mail server and then saved on the computer that you are using. Because the message is no longer on the POP3 mail server, you can’t see it when you connect from another computer. By changing the settings on your POP3 email account, you can choose whether the messages are removed after they're downloaded. Router's Configuration: Now, Mail Server Configuration Gmail Server   Yahoo Server   DNS Server Configuration      Gmail User’s Email Client Configuration:   Yahoo User’s Email Client Configuration: Thus you can configure all other machines.   Test: Send an email to Yahoo user mehedi@yahoo.com   from Gmail user Mushfiq PC ( mushfiq@gmail.com ) Sending Part: Gmail user Mushfiq is sending an email to Yahoo user Mehedi    Receiving Part:    Mehedi User who is using Yahoo mail has received an email from Gmail user mushfiq        

  Types of Routing Protocol                                Video :                    Difference Between Static Route and Dynamic Route Static Routing Dynamic Routing Does not use routing protocol Use routing protocol It is ideal for small/simple networks It is suitable for large/complex networks Configuring static route involve less cost Dynamic routing involves cost in terms of CPU processes and bandwidth on the network links It is maintained by Network Administrator Routers are responsible for maintaining paths Routes cannot be changed until authorized by the administrator Routing protocols find the routes for traversing the packets Routers are not updated dynamically in the routing table and hence cannot detect inactive routes Routing protocols update the routing table with the update routes Li

  Backup & Restore process of CISCO Router Video link: At first, take a look at Backup process:     Router>en Router#conf t Router(config)# Router(config)#int g0/0 Router(config-if)# Router(config-if)#ip add 1.1.1.1 255.0.0.0 Router(config-if)#no sh Router(config-if)# Router(config-if)#ex Router(config)#ex Router#ping 1.1.1.2   Put the IP address of the TFTP-Server     Backup configuration on the Router0: Router(config)# Router(config)#Hostname Dhaka Dhaka(config)#int lo 1 Dhaka(config-if)#ip add 5.5.5.5 255.0.0.0 Dhaka(config-if)#ex Dhaka(config)#int lo 3 Dhaka(config-if)#ip add 6.6.6.6 255.0.0.0 Dhaka(config-if)#ex Dhaka(config)#exit Dhaka#copy running-config startup-config Destination filename [startup-config]? Building configuration... [OK Backup Configuration for running-config:   Dhaka#copy tftp: running-config Address or name of remote host []? 1.1.1.2 Source filename []? Dhaka-confg