SUMMARIZATION TOPIC 1.1 AND 1.3 INTRODUCTION TO NETWORK, , - Coggle…
SUMMARIZATION TOPIC 1.1 AND 1.3 INTRODUCTION TO NETWORK
Definition of the Computer Network
-Computer Network can be defined as interconnected collection of autonomous computers.
-Made up of telecommunication network technologies, based on physically wired, optical and wireless radio.
Advantages of the Computer Network
-Allow to manage multiple computers from a central location
Disadvantages of Computer Network
-Hardware and software management and administration costs
-Illegal or undesirable behaviour
: Computer network that had to be request or services from another computer on a same network
: Usually have more processing power, memory and hard disk space than clients.
Network Interface Card (NIC)
: The device inside a computer that connects a computer to the network media
Network Operating System (NOS)
: Software that runs on a server and enables server to manage data, users, groups, security, applications and other networking functions.
: A computer that enables resource sharing by other computers on the same network.
: Networks can be arranged in a ring, bus or star formation and the star formation is the most common
TCP/IP Communication Process (Cont.)
When receiving the data link frames from the web server, the client processes and removes each protocol header in the opposite order it.
First, the Internet header is removed.
Then the IP header
Then the transport layer header
Finally the HTTP information is processed and sent to the client's web browser
TCP/IP Communication Process
Sending data from a web server to a client the encapsulation procedure
The webserver prepares the Hypertext Markup Language (HTML) page. The HTTP application layer protocol send the data to the transport layer.
The transport layer breaks the data into segments and identifies each
Next, the IP source and destination addressed are added, creating an IP Packet.
The Ethernet information is then added creating the Ethernet Frame, or data link frame.
This frame is delivered to the nearest router along the path towards the web client. Each router adds new data link information before forwarding the packet.
How the TCP/IP Model and the OSI model are used to facilitate standardization in the communication process
In the OSI model, the network access layer and the application layer of the TCP/IP model are further divided to describe discrete functions that must occur at these layers.
The TCP/IP Protocol Model
Created in the early 1970s for internetwork communications
Also called TCP/IP Model or the Internet Model
The benefits of using a layered model
Preventing technology changes in one layer from affecting other layes.
Assissting in protocol design since protocols at each layer have defined functions.
Fostering competition because products from different vendors can work together.
Type of rule that are necessary to successfully communicate
Main Elements of data communication system
Protocols used in network communications also define
Message formatting and enscapulation
Message delivery options
Different between Extranet and Intranet
Extranet: Shared content accessed by groups through cross-enterprise boundaries
Intranet: Shared content accessed by members within a single organization
The Internet is connecting a computer to any other computer anywhere in the world via dedicated routers and servers.
It can send and receive all kinds of information such as text, graphic, voice, video and computer programs