Network Media, models and number systems

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Presentation transcript:

Network Media, models and number systems 2018-2019 Term1 Network Media, models and number systems

Network Models ( peer to peer and client server) models Unit2 Objectives: Network Models ( peer to peer and client server) models Convert between binary, denary and hexadecimal numbers Convert Binary to Denary

Network Models

Clients and Servers Powerful computer (servers) provides resources to small computers called clients. Servers have software installed that enable them to provide information and services, like email or web pages, to other hosts on the network. Each service requires separate server software.

Types of servers File Server Web Server Database Server Game Server Gives clients space to save and get files Stores and gives clients access to webpages Gives access to a database to store and get data Application servers gives clients access to gaming service

Clients and Servers Clients (hosts) are computer that have software to request and display the information obtained from the server. An example of client software is a web browser, such as Internet Explorer, Safari, Mozilla Firefox or Chrome.

Clients and Servers Model Advantages Easy to manage (one administrator) High security All files backed up. Clients can get programs from server Easy to add more computers Disadvantages Costly If server is down no work can be done Not easy to set up

Peer to Peer Network Model All computers are equal. All computers can act as clients and servers. Example : sending pictures by Bluetooth from your phone to laptop

Peer to Peer Network Model Advantages Easy to setup Less complex Cheaper Can be used for simple tasks, ( transferring files and sharing printers) Disadvantages No centralized administration Not secured Can not add more computers Network is slow because all devices may act as both clients and servers

Book Activity – P67

Binary and hexadecimal Denary System The number system we use every day, based on 10 digits (0,1,2,3,4,5,6,7,8,9)

Binary and hexadecimal Binary System The number system that uses 0s and 1s to represent each bit. This base two numbering system

Converting Denary to Binary Convert 5 from denary to binary Remainder

Converting Denary to Binary Book Activity P-69 2 3 1101

Converting Denary to Binary Book Activity P-70 22 5 1 1 1 10110

Book Activities Book Activity P-71-72 Home Work Assignment

Converting Denary to Binary One Minute Activity Converting Denary to Binary Convert the number 220 to binary number and be the Winner

Converting Binary to Denary To convert a number from binary to denary let’s follow this method 128 64 32 16 8 4 2 1 1+4+8 =13 x2 x2 x2 x2 x2 x2 x2 4 15

Book Activities Book Activity P-74