Network diagram

NETWORK DEVICE

Network devices are components used to connect computers or other electronic devices together so that they can share files or resources like printers or fax machines.

Basic network devices

• A Computer• A hub• A switch• A router• A bridge• A firewall• A server• Cables

Why to go for a network diagram?

Network diagram: provides• Planning• Security• Flexibility

Physical network topology

Logical network topology

Topology

A computer

Hubs:

Connects multiple Ethernet segments together making them act as a single segment. Works on OSI layer 1.

100baseT hub

Switches

A switch splits the network traffic and sends it to different destinations rather than to all systems on the network. Works on OSI layer 2.

Switch ISDN switch

Switch image Stack of the switch

ROUTERS:

A device that forwards data packets along networks. A router is connected to at least two networks, commonly two LANs or WANs .Routers use the logic network address such as IP address to make decisions.

Router Wireless Router

FIREWALLA piece of hardware or software put on the network to prevent some communications forbidden by the network policy.

Firewall Router Firewall

server

• A computer on a network or other network device that stores all necessary information and is dedicated to provide a particular service.

Types of servers

Common symbols

Common symbolsCommunication link Wireless Access point

GatewayATM switch

• ATM uses a connection-oriented model in which a virtual circuitmust be established between two endpoints before the actual data exchange begins

• Gateway- a computer or a network that allows or controls access to another computer or network

Common symbols

Common symbolsCoaxial line Fiber optic line tag

Twisted pair cable

• Twisted pair cabling is a type of wiring in which two conductors are twisted together for the purposes of canceling out electromagnetic interference

• Coaxial cable is the kind of copper cable used by cable TV companies between the community antenna and user homes and businesses. 

• Fiber-optic communication is a method of transmitting information from one place to another by sending pulses of light through an optical fiber

Common symbolsRelative database Bridge

Common symbols

Common symbols

Radio tower

Internet cloud

Softwares for network diagram

• Smart draw.• Edraw Network Diagram.• MS Visio.• Nevron diagram designer.• 10 strike network diagram.• Concept draw7.

Automatic generation of the LAN network model

http://weblandesigner.elena.aut.ac.nz/

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