Introductionto Networking Basics By Avinash Kulkarni

What is Network? Devices Used in Network Types of Network Protocol Network Diagram Services on Network Content : By Avinash Kulkarni

Networking is connecting two or more devices to allow communication between them with the purpose of sharing information and resources. The devices on a network may be linked through cables, telephone lines, radio waves, satellites or infrared light. What is a Network? By Avinash Kulkarni

Client/Server In Client/server model at least one computer acts as a server. Servers hold resources that are accessed over the network by clients. Resources are like shared files, , or applications. By Avinash Kulkarni

Peer-to-Peer In Peer-to-peer network model every computer can act as a client and a server at the same time. Operating systems allow users to share resources and files located on their computers and to access shared resources found on other computers By Avinash Kulkarni

LAN/MAN/WAN : The terms mainly refer to the geographical area of the network. LAN is Local Area Network & is a high speed network typically within a building. MAN is Metropolitan network. it is within a city. WAN is Wide Area Network and refers to low speed networks that covers a large distance. e.g. a network that spans several cities or the entire globe. By Avinash Kulkarni

Star Ring Mesh Types of Network Topologies By Avinash Kulkarni

Devices are connected through a central hub. Star Hub. By Avinash Kulkarni

Ring Every device is connected to two other devices forming a ring. By Avinash Kulkarni

In a full mesh every device in the network is connected to every other device. In reality a partial mesh is often used, such as in backbone environments. Mesh By Avinash Kulkarni

Media cable Network Interface Card Hub Switch Router Gateway Networking Devices By Avinash Kulkarni

UTP Fiber Types of Cables By Avinash Kulkarni

 Ethernet UTP Cat 3,5,6,7  Optical Fibre Single Mode Multimode UTP & Fiber By Avinash Kulkarni

Structured Cabling UTP cable is rated according to its data carrying capacity. –Cat 1 - analog & digital voice ( Telephone ) –Cat 2 - ISDN & data speed up to 4 Mbps –Cat 3 - high speed data up to 16 Mbps –Cat 4 - high speed data up to 20 Mbps –Cat Mbps –Cat Mbps Fiber optic cables –Multimode Fiber …100 FX– 2.5 Km –Multimode Fiber …Gigabit – 500m –Single Mode fiber – 40 Km By Avinash Kulkarni

FiberUTP Expensive Low Cost High capacity 1Gbps Mbps Negligible loss Low loss Difficult to join Easy to join Distance in Kms In meters By Avinash Kulkarni

Network Interface Card A network adapter card plugs into the PC, to provide the connection to the network. Types of cards –Ethernet –Gigabit By Avinash Kulkarni

Hub Node - ANode - B Node - CNode - D Hub Shared bandwidth Latency Period more Lot of collision Half Duplex By Avinash Kulkarni

Switches Switches allows you to avoid the congestion of a shared Ethernet network by permitting you to create individual segments. By Avinash Kulkarni

Router A networking device that is used to extend or segment networks by forwarding packets from one logical network to another. Routers are most often used in large inter- networks that use for connecting TCP/IP hosts and local area networks (LANs) to the Internet using dedicated leased lines. By Avinash Kulkarni

Firewall A firewall is a hardware device or software application that protects private networks from unauthorized external intruders. A firewall filters both inbound and outbound traffic and checks if it meets certain criteria. By Avinash Kulkarni

Network Operating Systems Network operating systems (NOS) coordinate the activities of multiple computers across a network. The network operating system acts as a director to keep the network running smoothly. By Avinash Kulkarni

Network Operating Systems Microsoft Windows NT/2000/2003 Linux Novell Netware Sun Solaris Unix By Avinash Kulkarni

Benefits of Network in Office Sharing of Printers/Scanner Files Sharing Centralized Access to Office Automation tools ( MS Office, Lotus Notes etc.) and software like Virus Vaccine from the Server. Accessing centralized Database and Applications, MIS Centralized Mail Server and Client at Desktop Continue…. By Avinash Kulkarni

Centralized Intranet site having Employee database, Online leave applications, Travel forms, Medical Forms, Online Circulars/ Notice etc. Centralized Network Management. Setting up of Virtual LAN as per the function of the group irrespective of the physical locations of the employees Continue…. By Avinash Kulkarni

Intranet An intranet is a private network that is contained within an enterprise. The main purpose of an intranet is to share company information and computing resources among employees. An intranet uses TCP/IP, HTTP, and other Internet protocols. Intranet looks like a private version of the Internet. By Avinash Kulkarni

Internet Internet is a worldwide system of computer networks Internet uses a set of protocols called TCP/IP (Transmission Control Protocol/Internet Protocol) Internet is a public, cooperative, and self-sustaining facility accessible to hundreds of millions of people worldwide. By Avinash Kulkarni

LAN Services Creating Work Group Sharing resources e.g. HDD,CD-ROM,FDD and Printers Sharing Applications. By Avinash Kulkarni

Thank You ! By Avinash Kulkarni