When a host gets active, it contacts to the DHCP server and request address information. DHCP can quickly configure a host, everything that required for doing so is a defined range of IP addresses on a DHCP server. The protocol is used to transport host-specific configuration parameters from a DHCP server to the host and a mechanism is used to assign network addresses among the hosts. The DHCP contains two components i.e., a protocol and mechanism. It includes information such as IP address and subnet mask of the computer, IP address of the router and IP address of the name server. The received IP address is used by file transfer client to access the file transfer server.ĭHCP (Dynamic Host Configuration Protocol) has been concocted to impart static and dynamic address allocation to the hosts connected in the network.The DNS client passes the IP address to the file transfer server.DNS server sends the response with the IP address of the required file transfer server.The DNS client sends the query to the DNS server which gives file transfer server name by utilizing known IP address of the DNS server.The file transfer client transits the hostname to the DNS client.The hostname is passed to the file transfer client by the user.The given figure illustrates the working of the DNS step by step. To establish the connection the TCP/IP suite must need IP address of the file transfer server.
When a user wants to use a file transfer client to access the file transfer server running on a remote host while the user is only aware of file transfer name.
But this mechanism would be extremely unreliable for today’s scenario where there is an extensive number of hosts are connected through the internet. Whenever a program or a user needed to map a name to address, the host consult the host file and find the mapping. Those host files are stored on each host and updated periodically from a master host file. DNS (Domain Name System) is a mechanism which provides directory lookup service which maps the name of a host on the Internet and its unique numerical address (logical address).Ĭonventionally, mapping was done using a host file, which has details such as name and address.
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