Unit 1: Introduction and Physical Layer Topic 4: TCP/IP Protocol Suite

1. SNS COLLEGE OF ENGINEERING
Kurumbapalayam(Po), Coimbatore – 641 107
Accredited by NAAC-UGC with ‘A’ Grade
Approved by AICTE, Recognized by UGC & Affiliated to Anna University, Chennai
Department of Information Technology
Course Name : CS8591 Computer Networks
III Year / V Sem
SNSCE / IT/ Sem V / S Rijutha / AP / IT
Unit 1: Introduction and Physical Layer
Topic 4: TCP/IP Protocol Suite

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Recap
Identify the correct Layer - PDU in the following

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What is TCP/IP ?
Internet
Data Exchange
Recover from Failure

4. SNSCE / IT/ Sem V / S Rijutha / AP / IT
What is TCP/IP ?
Broken down Addressed
Transmitted
Routed
Received

5. , here
SNSCE / IT/ Sem V / S Rijutha / AP / IT
TCP/IP
Without TCP/IP Protocol suite, there would be no internet

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➢ TCP - Defines how applications create communication channels
➢Manage how a message broken down into packets that is to be
transmitted
➢Reassemble at the destination
What is TCP/IP ?
➢IP - Defines how to address the packet
➢Route the packet and ensure it reaches right destination

7. SNSCE / IT/ Sem V / S Rijutha / AP / IT
TCP/IP Protocol Suite
Stateless
Free Network path
Nonproprietary
Modify easily
Compatible

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OSI VS TCP/IP
All
People
Seems
To
Need
Domino
Pizza
Away
Pizza
Sausage
Throw
Not
Do
Please

9. SNSCE / IT/ Sem V / S Rijutha / AP / IT
TCP/IP Protocol Suite
Application layer
Data
Generation
Translation
Compression
Encryption

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TCP/IP Protocol Suite
Transport layer
Data
Segmentation
Flow Control
Error
Checking

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TCP/IP Protocol Suite
Internet Layer
Sender and
Receiver Address
Path
Determination
No internet
Layer
Limited to LAN

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TCP/IP Protocol Suite
Network Interface
Hardware
Address
Physical Cabling

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⮚ HTTP (hypertext transfer protocol) -This is the workhorse of the Web.
⮚ SMTP,POP3,IMap4 – These are email protocols
⮚ TCP (Transmission control protocol) is a connection orientated protocol and
is used to provides a reliable end to end connection.
⮚ IP (Internet Protocol) – This is the main networking protocol.
• There are two version of IP (IPv4 and IPV6).
TCP/IP Protocol Suite

14. SNSCE / IT/ Sem V / S Rijutha / AP / IT
⮚ UDP (used datagram protocol) is connection less protocol and doesn’t guarantee
delivery.
⮚ UDP is used more in utility applications like DNS, RIP (routing information
protocol), DHCP.
⮚ ARP (address resolution Protocol) - Translates an IP address to a MAC or physical
address (IP4 networks)
TCP/IP Protocol Suite

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TCP/IP Protocol Suite
OSI Model - TCP/IP Model - TCP/IP Protocol Suite

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Uses of TCP/IP
Remote Login
Email
Webpages
Remote Server host

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Advantages & Disadvantages
ADVANTAGES DISADVANTAGES
Helps establish a connection between different
types of computers
Complicated to set up and manage;
Works independently of the operating system Doesn't guarantee delivery of packets
Highly scalable Not easy to replace protocols in TCP/IP
Operated independently Especially vulnerable to a SYN
(synchronization) attack (DOS)
supports several routing protocols

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Quiz
1. TCP/IP is extensively used model for the World Wide Web for providing
network communications which are composed of 4 layers that work together.
a. True b. False.
2. TCP/IP is composed of _______ number of layers.
a. 2 b. 3 c. 4 d. 5
3. Connection authentication is offered for ensuring that the remote host has the
likely Internet Protocol (IP) ___________ & _________
a. address, name b. address, location c. network, name d. network, location
4. Which of the protocol is not used in the network layer of the TCP/IP model?
a. ICMP b. IP c. IGMP d. HTTP

19. THANK YOU !
SNSCE / IT/ Sem V / S Rijutha / AP / IT
SNSCE / IT/ Sem V / S Rijutha / AP / IT