TCPIP Transmission Control Protocol Internet Protocol

1
TCP/IPTransmission Control Protocol / Internet
Protocol

• TCP/IP is the communication protocol for the
  Internet
• TCP/IP defines how electronic devices should be
  connected to the Internet, and how data should be
  transmitted between them
• TCP is for communication between applications
• TCP is responsible for breaking data down into IP
  packets
• IP is for communication between computers
• IP is responsible for routing each packet to its
  destination

2
TCP/IP Addressing

• Each computer must have an IP address before it
  can connect to the Internet
• An IP address contains 4 numbers. The numbers are
  between 0 and 255. Addresses are written as four
  numbers separated by a period 157.89.7.164
• TCP/IP uses 32 bits or 4 bytes addressing
• IP numbers are hard to remember. Using a domain
  name is easier www.eku.edu

3
TCP/IP Protocols

• TCP/IP is a large collection of different
  communication protocols based upon the two
  original protocols TCP and IP
• HTTP takes care of the communication between a
  web server and a web browser
• HTTPS takes care of the secure communication
  between a web server and a web browser

• SSL (Secure Sockets Layer) is used for encryption
  of data for secure data transmission
• SMTP (Simple Mail Transfer Protocol) is used for
  transmission of e-mails
• MIME (Multi-purpose Internet Mail Extensions)
  lets SMTP transmit multimedia files
• IMAP (Internet Message Access Protocol) is used
  for storing and retrieving e-mails

4
TCP/IP Protocols

• POP (Post Office Protocol) is used for
  downloading emails from an e-mail server to a PC
• FTP (File Transfer Protocol) takes care of
  transmission of files between computers
• When you write an email, you use an email program
  like Outlooks, Lotus Notes
• Your email program uses deferent TCP/IP
  protocols

• It send your emails using SMTP. SMTP can
  transmit pure text. SMTP uses the MIME protocol
  to send binary data
• It can download your emails from an email server
  using POP
• It can connect to an email server using IMAP