Basic of networking

NETWORKING : 

NETWORKING PRESENTED BY : FARHEEN AFAQ REKHA TEJNANI BEAUTY SARKAR 1/28/2012 1

CONTEXT: 

CONTEXT BASIC OF NETWORKING HISTORY OF NETWORKING DEFINE NETWORKING TYPES OF NETWORKING TOPOLOGIES OF NETWORKING 1/28/2012 2

NEEDS OF NETWORKING: 

NEEDS OF NETWORKING Networking began its infancy in the mid - 1960’s By the US Department of Defence (DOD) The original intention of networking was being developed to withstand a nuclear war. Telephone networks were to vulnerable and would terminate all conversation should a nuclear war occur 1/28/2012 3

History Of Networking: 

History Of Networking ARPA ( Advanced Research Project Agency) was created in response with the launching of Sputnik in 1957. ARPA decided that a DOD network should be packet switched networked consisting of subnet and host computer. Experimental network research was awarded to UCLA, UCSB,SRI and UNIV. of utha in 1969. These areas were because they all had a large number of ARPA contracts . 1/28/2012 4

DEFINE NETWORK: 

DEFINE NETWORK A network is a set of devices connected by physical media links. A network is recursively is a connection of two or more nodes by a physical link or two or more networks connected by one or more nodes. 1/28/2012 5

TYPES OF NETWORKS: 

TYPES OF NETWORKS There are three types of Network LAN : Local Area Network , Is a small geographical area such as our school board MAN: Metropolitan Network Is a network over a large geographical area such as the provincial government. WAN : Wide Area Network Is a network used over an extremely large geographical area such as the federal government 1/28/2012 6

NETWORKS TOPLOGIES: 

NETWORKS TOPLOGIES Network are broken into 3 topologies BUS Topology : STAR Topology RING Topology 1/28/2012 7

BUS TOPOLOGY : 

BUS TOPOLOGY Allows information to be directed from one computer to the other lots of binary collisionthogh 1/28/2012 8

STAR TOPOLOGY : 

STAR TOPOLOGY Is the most common type used. All computer are attached to a hub. Less collision and most efficient 1/28/2012 9

RING TOPOLOGY: 

RING TOPOLOGY Uses a token to pass information from one computer to other A token is attached to the message by the sender to identify which computer should recive the message As the message moves around the ring, each computer examines the token If the computer identifies the token as its own, then it will process the information 1/28/2012 10

DISADVANTAGE OF TOPOLOGY: 

DISADVANTAGE OF TOPOLOGY Ring : Is if one computer is broken or down, the message cannot be passed to the other computers 1/28/2012 11

THE SEVEN LAYER OF THE OSI MODEL ARE: 

THE SEVEN LAYER OF THE OSI MODEL ARE Layer 1: PHYSICAL Layer 2:DATA-LINK Layer3:Network Layer4: Transport Layer5:SESSION Layer6:Presentation Layer7:APPLICATION 1/28/2012 12

PHYSICAL LAYER: 

PHYSICAL LAYER The physical layer is concerned with transmitting raw bits over a communication channel though hubs, wires (cat5 UTP), modems , network cards… Basically any thing that is physical to the network In networking, computers are also known as hosts or nodes. When looking at network cables, there are two types that affect nodes Straight though cables or also known as patch cables Cross over cables The difference in the cables are the way the wires are connected within the RJ45 I have attached a sheet for you in your package 1/28/2012 13

PowerPoint Presentation: 

1/28/2012 14

PowerPoint Presentation: 

1/28/2012 15

PowerPoint Presentation: 

1/28/2012 16

PowerPoint Presentation: 

1/28/2012 17