Networks & Vlan

8/8/2019 Networks & Vlan

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NETWORKS & VLAN


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WHY COMMUNICATION ?

y Communications activity associated with distributing or

exchanging information

y Telecommunications technology of communications at a

distance that permits information to be created any where andused everywhere with little delay

y Today it, involves

y Data: digital and analog

y

Voice: spoken wordy Video: telelcommunication imaging


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Essentials for Communications

1

>Must have a message2>Message must have a transmitter

3>Message must have a medium

4>Message must be understood

5>Message must have some level of security

Source Transmitter Transmission Receiver Destination

Source System Destination System

Workstation/PC Workstation/PCMedium

1 2 3 4 5 6


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TYPES OF NETWORKS

LAN LOCAL AREA NETWORK IS A SMALL GEOGRAPHICAL AREA SUCH AS COLLEGE

CAMPUS

MAN METROPOLITAN AREA NETWORK IS A NETWORK OVER A LARGER

GEOGRAPHICAL

AREA SUCH AS COMMMUNICATION WIHIN A CITY .

WAN WIDE AREA NETWORK IS A NETWORK USED OVER AN EXTREMELY LARGE

GEOGRAPHICAL AREA SUCH AS 2 CITIES.

Basics of Networking


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NETWORKS ARE BROKEN INTO 3 TOPOLOGIES.

THEY ARE:

yBUS TOPOLOGY

ySTAR TOPOLOGY

yMESH TOPOLOGY

yRING TOPOLOGY

yHYBRID TOPOLOGY

Basics of Networking


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BUS TOPOLOGYALLOWS INFORMATION TO BE

DIRECTED FROM ONE COMPUTER TO THE OTHER.

LOTS OF BINARY COLLISION THOUGH.

BUS TOPOLOGY


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STAR TOPOLOGY IS THE MOST COMMON TYPEUSED. ALL COMPUTERS ARE ATTACHED TO A HUB.

LESS COLLISIONS AND MOST EFFICIENT.

STAR TOPOLOGY


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RING TOPOLOGY


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MESH TOPOLGY


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HYBRID TOPOLOGY


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The seven layers of the OSI Model are:

Laye 1 H C LLaye 2 D T -L K

Laye 3 ETW K

Laye 4 T T

Laye 5 E

Laye 6 E E T T

Laye 7 L C T

Basics of etwo king


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VLAN

WHY VIRTUAL?


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General Description of LAN

Covering a small geographic area

y Home

y Office

y Group of Buildings


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Definition of Virtual Local Area

Network

y Commonly known as VLAN

yGroup of hosts(ports) on the switch with a common set of requirements

y Group of hosts communicate as if they were attached to the same wire


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LAN VS. VLAN

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Static VLAN

y Ports on a switch are administratively assigned to a VLAN

y Benefits

y can be assigned by port, address, or protocol type

y secure, easy to configure and monitor

y works well in networks where moves are controlled

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Dynamic VLAN(VMPS)

y Switch ports can automatically determine a users VLAN assignment based on

either/or:

y MAC / logical address / protocol type

y When connected to an unassigned port, the switch dynamically configures the

port with the right VLAN

y It has 2 stages. Firstly static then VMPS.17


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Port-Centric VLAN

y Same VLAN, same router interface

y Easy for managemenT

3 Port-Centric VLANs


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VTP AND ITS

MODES


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ISL FORMAT


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HOW VTP WORKS?


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THANK YOU

Networks & Vlan

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