Domain Name Service (DNS): DNS is an internet service that translates domain names into IP addresses. Because domain names are alphabetic, they’re easier to remember. The internet, however, is really based on IP addresses. Every time you use a domain name, a DNS service translates the name into the corresponding IP address. For example, the domain name www.eiheducation.inmight translate to 23.229.193.162. The DNS protocol uses port number 53.

A domain is a subtree of the domain namespace. From the root, few of the assigned top-level domains are:

GOV = Government body.

EDU = Educational body.

NET = Networks

COM = Commercial entity.

MIL = U.S. Military.

ORG = Any other organization not previously listed.

DNS names are assigned through the Internet Registries by the Internet Assigned Number Authority (IANA).

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Hypertext Transfer Protocol (HTTP): The HTTP is an application protocol for distributed, collaborative, hypermedia information systems. HTTP is the foundation of data communication for the World Wide Web. HTTP protocol uses port number 80. Hypertext is a structured text that uses logical link i.e. hyperlinks, between nodes containing text. HTTP is the protocol to exchange o transfer hypertext.

It is used to make a request from the client to the web servers that open the right resource when you click on a link or type a URL in the web browser, whenever that resource may actually reside.

Trivial File Transfer Protocol (TFTP): Trivial File Transfer Protocol is a simple version of FTP that allows a client to get from or put a file onto a remote host. TFTP is a simple protocol for transferring files, implemented on top of the UDP/IP protocols using well-known port number 69. One of its primary uses is in the early stages of booting from a local area network because TFTP is very simple to implement. TFTP lacks security and most of the advanced featured offered by more robust file transfer protocols such as File Transfer Protocol.

TFTP protocol cannot be used for directory browsing; it can do nothing but only send and receive files.

This protocol sends a smaller block of data as compared to FTP without any authentication access hence it is insecure due to which it is less supported or used in the site.

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