Presentation on theme: "Introduction To Network. Overview Whats Network ? Types of Networks Open System Interconnection Reference Model (OSI / RM) Transmission Control Protocol."— Presentation transcript:
Overview Whats Network ? Types of Networks Open System Interconnection Reference Model (OSI / RM) Transmission Control Protocol / Internet Protocol (TCP/IP) Network Devices Network Topology Cabling LAN
Whats Network ? Network is a group of computers connected with others to share data.
Types of Network 1.Local Area Network (LAN) is a group of computers connected with others across limited geographic area. 2.Wide Area Network (WAN) is a group of computers connected with others across large geographic area. 3.Metropolitan Area network (MAN) is a network that spans a metropolitan area such as a city. 4.Storage Area network (SAN) is a dedicated, high- performance network used to move data between servers and storage resources. 5.Virtual Private Network (VPN) is a private network that is constructed within a public network infrastructure such as the Internet. 6.Intranets and Extranets.
OSI Reference Model Characteristics of OSI/RM –It contains seven layers. –Each layer has a specific function. –Each layer communicates with its own upper and lower layer. –Each layer has some network devices operate on it. –Each layer has some network protocols operate on it. Benefits of the OSI Model –Defines the process for connecting two layers. –Separates a complex function into simpler components. –Accelerates evolution.
Network Topology Network topology defines the structure of the network. Logical topology defines how the media is accessed by the hosts for sending data. Physical topology is the actual layout of the wire or media.
Network Media Copper Media Optical Media Wireless Media
Ethernet Cabling The types of Ethernet cables available are: 1. Straight-through cable 2. Crossover cable 3. Rolled cable
Straight-through cable The straight-through cable is used to connect Host Switch Host Hub Router Switch Router Hub
Rolled Cable It isnt used to connect any Ethernet connections together. It uses only for making a configuration for routers or switches.
Optical Media Fiber-optic cabling is typically used to provide very high speeds and to span connections across very large distances. For example, speeds of 100Gbps and distances of over 10 kilometers Fiber cabling is not affected by electromagnetic interference (EMI), whereas copper cabling is.