web protocols

7/30/2019 web protocols

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What is a Protocol?

The set of rules and regulations for communicationa Network. Computers on a Network cannot

communicate with other computers unless they ar

using the same protocol.

What is a Port? In computer networking, a port number is pa

addressing information used to identify the sand receivers of messages.


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List of Network Protocols

TCP/IP (Trancmistion Control Protocol)

HTML (Hyper Text Markup language)

HTTP (Hyper text transfer Protocol)

FTP (File transfer protocol)

SMTP (Simple Mail Tranfer Protocol)

IMAP (Internet Message Access Protocol)

MIME (Multipurpose Internet Mail Protocol)

POP (Post office protocol)

SSH (Secure socket layer)

Telnet


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TCP/IP Protocol?

Transmission Control Protocol/Internet Pr

Part of a set of protocols known as the InProtocol Suite.

The most commonly used, routable, netw

protocol. TCP transmits data and IP refer

addressing.Necessary for Internet communication. A

protocols below (except DNS) occur ove

TCP/IP.


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HTML Protocol

Hypertext Markup Language. Web page

that defines how a page appears in the browser.


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HTTP Protocol

Hypertext Transfer Protocol. Connects lo

browser to a web server. typically using port 80.


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FTP Protocol

FTP stands for File Transfer Protocol.

Commonly used to transfer files across the internet web server and Windows hosts.

FTP Offers Two Important Functionalities.

(1) File Downloading :- Port no is 21

(2) File Uploading :- Port no is 20

File Dowloading is a Process of coyping a file from

computer to your computer.

File Uploading is a process of sending a file from yocomputer to remoute computer.


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SMTP Protocol

Simple Mail Transfer Protocol. Port No is 2

SMTP sents email to one or more recipielisted in exam objectives, but of equal

importance, is POP3 Post Office Protoc

This protocol downloads inbound email

messages.


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IMAP Protocol

Internet Message Access Protocol. Port N

Used for accessing email on a remote sefrom a local client.

Where as POP3 downloads email messa

IMAP instantly accesses email stored on

server.


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MIME Protocol

As You know now that SMTP is useful to send m

only with ASCII characters.

If you wish to extend the capability of SMTP for sound,picture,vedio clips or program files withemail,MIME protocol Should be used.

When you wish to send non-text data with ema

helps you to encode this data in to ASCII charadue to that,email can be sent to the mail serveSMTP


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POP Protocol

POP Stands for Post Office Protocol. Port

The POP define how mail client like Micro

Outlook can retrieve email messages fro

mail server.

It has various versions like POP,POP2(port

109),POP(port 110) among tham POP3 is lone.

Using POP email client can save messag

local computer.


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SSH Protocol

Secure Shell.Port no is 22

Secure Shell (SSH) is a cryptographic ne

protocol for secure data communicatio

SSH uses public-key cryptography to

authenticate the remote computer and

to authenticate the user.


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Telnet Protocol

Telnet is a Teletype Network.its port No is

Protocol used in the command-line tool

same name.

Useful for remote administration of serve

clients, and network devices such as rou

Communicates in unsecured plain text.


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