From the Figure illustrates how a message is transmitted from the application layer to the physical layer in the Internet model of a data communication network.1. With the aid of the diagrams of header formats2. explain the main purpose of all fields of the header formats of the transport, network, and data link layers protocols. For example, the main purpose of the source address and destination address of an IP Header is to provide the sender and receiver IP addresses, respectively. ApplicationLayerTransportLayerNetworkLayerData LinkLayerPhysicalLayerSenderHTTP Request+TCP HTTP Request+IP TCP HTTP RequestEthernet IP TCP HTTP RequestကာPDUPacket ApplicationLayerSegmentPacketFrameBitTransportLayerNetworkLayerData LinkLayerPhysicalLayerReceiverHTTP RequestTCP HTTP RequestIP TCP HTTP RequestEthernet IP TCP HTTP RequestபபடFig. 1: Message transmission through layers.The application Layeruses the HTTPprotocol• The transport layeruses the TCP(Transmission Control)Protocol• The network layer usesThe IP (Internet)Protocol●The data link layer of theLANs typically uses theEthernet protocol• Protocol Data Units(PDUs)

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Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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From the Figure illustrates how a message is transmitted from the application layer to the physical layer in the Internet model of a data communication network.

1. With the aid of the diagrams of header formats

2. explain the main purpose of all fields of the header formats of the transport, network, and data link layers protocols. For example, the main purpose of the source address and destination address of an IP Header is to provide the sender and receiver IP addresses, respectively.

Application
Layer
Transport
Layer
Network
Layer
Data Link
Layer
Physical
Layer
Sender
HTTP Request
+
TCP HTTP Request
+
IP TCP HTTP Request
Ethernet IP TCP HTTP Request
ကာ
PDU
Packet Application
Layer
Segment
Packet
Frame
Bit
Transport
Layer
Network
Layer
Data Link
Layer
Physical
Layer
Receiver
HTTP Request
TCP HTTP Request
IP TCP HTTP Request
Ethernet IP TCP HTTP Request
பபட
Fig. 1: Message transmission through layers.
The application Layer
uses the HTTP
protocol
• The transport layer
uses the TCP
(Transmission Control)
Protocol
• The network layer uses
The IP (Internet)
Protocol
●
The data link layer of the
LANs typically uses the
Ethernet protocol
• Protocol Data Units
(PDUs)

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