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LAN RADIO This project is basically used to listen music on the

computers which are connected in LAN.

The computers or users are connected to a web serverwhich has all the songs loaded in it.

The users connected can request the songs of theirchoice to be played .

For this the users should be registered on the sitecreated by the administrator

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Features of LAN radio Users can see the list of all songs categorized to latest

songs, movie songs , artist or albums .

Users can search for any song he / she wish to hear Users can see the playlist order

Users can see the information of the recently playedsongs

Users can see their last online information.

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Users are able to send message ,suggestions and

complaints to the administrator.

The users can even see the details of the song that towhich movie or album the song belongs to.

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SWITCHED LAN

ARCHITECTURE

OR

HIERARICHAL LAN ARCHITECTURE

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Hierarchical LAN Model

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Hierarchical LAN Model The typical hierarchical design model is broken up in to

three layers : access ,distribution ,core.

Access Layer:-

The access layer interfaces with end devices, such as PCs,printers, and IP phones, to provide access to the rest of thenetwork.

The access layer can include routers, switches, bridges,hubs, and wireless access points.

The main purpose of the access layer is to provide a meansof connecting devices to the network and controllingwhich devices are allowed to communicate on the network

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Hierarchical LAN Model

Distribution Layer

The distribution layer aggregates the data received fromthe access layer switches before it is transmitted to the corelayer for routing to its final destination.

The distribution layer controls the flow of network trafficusing policies and delineates broadcast domains byperforming routing functions between virtual LANs(VLANs) defined at the access layer.

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VLANs allow you to segment the traffic on a switch

into separate sub networks. For example, in a university you might separate traffic

according to faculty, students, and guests.

Distribution layer switches are typically high-performance devices that have high availabilityand redundancy to ensure reliability.

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Core Layer

The core layer of the hierarchical design is the high-

speed backbone of the internet work. The core layer is critical for interconnectivity between

distribution layer devices, so it is important for thecore to be highly available and redundant.

The core area can also connect to Internet resources. The core aggregates the traffic from all the distribution

layer devices, so it must be capable of forwarding largeamounts of data quickly.

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Benefit of Hierarchical Network

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Principle of hierarchical designNetwork Diameter

When designing a hierarchical network topology, the

first thing to consider is network diameter. Diameter is usually a measure of distance, but in this

case, we are using the term to measure the number ofdevices.

Network diameter is the number of devices that apacket has to cross before it reaches its destination. Keeping the network diameter low ensures low and

predictable latency between devices.

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Principle of hierarchical design

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Principle of hierarchical design In the figure, PC1 communicates with PC3. There could be

up to six interconnected switches between PC1 and PC3. Inthis case, the network diameter is 6.

Each switch in the path introduces some degree of latency. Network device latency is the time spent by a device as itprocesses a packet or frame.

Each switch has to determine the destination MAC address of theframe, check its MAC address table, and forward the frame out theappropriate port.

Even though that entire process happens in a fraction of a

second, the time adds up when the frame has to cross manyswitches. In a hierarchical network, network diameter is always going

to be a predictable number of hops between the source anddestination devices.

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Principle of hierarchical designBandwidth Aggregation

Bandwidth aggregation is the practice ofconsidering the specific bandwidth requirementsof each part of the hierarchy.

After bandwidth requirements of the network areknown, links between specific switches can be

aggregated, which is called link aggregation. Link aggregation allows multiple switch port links

to be combined so as to achieve higher throughputbetween switches.

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Principle of hierarchical design

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Principle of hierarchical design In figure, computers PC1 and PC3 require a significant

amount of bandwidth because they are used fordeveloping weather simulations.

The network manager has determined that the accesslayer switches S1, S3, and S5 require increasedbandwidth.

Following up the hierarchy, these access layer switchesconnect to the distribution switches D1, D2, and D4.

The distribution switches connect to core layer

switches C1 and C2. Notice how specific links onspecific ports in each switch are aggregated. In this way, increased bandwidth is provided for in a

targeted, specific part of the network.

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Principle of hierarchical designRedundancy Redundancy can be provided in a number of ways. For example, you can double up the network

connections between devices, or you can double thedevices themselves. Implementing redundant links can be expensive.

Imagine if every switch in each layer of the networkhierarchy had a connection to every switch at the nextlayer.

It is unlikely that you will be able to implementredundancy at the access layer because of the cost andlimited features in the end devices, but you can buildredundancy into the distribution and core layers of thenetwork.

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Principle of hierarchical design

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Principle of hierarchical design In the figure, redundant links are shown at the distribution

layer and core layer. At the distribution layer, there are two distribution layer

switches, the minimum required to support redundancy atthis layer.

The access layer switches, S1, S3, S4, and S6, are cross-connected to the distribution layer switches. This protects your network if one of the distribution switches fails.

In case of a failure, the access layer switch adjusts its transmission

path and forwards the traffic through the other distribution switch.

Some network failure scenarios can never be prevented, forexample, if the power goes out in the entire city, or theentire building is demolished because of an earthquake.

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Modules It consists of three basic module:-

1.Enrolment module

Here the user enrolls or registers himself or herself for the

use of the lan radio.2.Login module

Here the user manages his /her account create, playlist,forums, blogs etc.

3.Administration moduleThis is the most important module and here the

administrator can add songs ,manage user account, anddo several other tasks.

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Advantages of LAN radio User online can listen to different songs and may or

may not enter choices in playlist necessarily.

User get a large variety of choices of songs and neednot store on system.

User can search for the song required easily.

In case of radio if they wish to put their choices the

number of radio stations for placing request may bebusy but in LAN radio they can queue their songs inplaylist.

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Private list of favorite songs can be created at once and

the songs would transfer automatically to the mainplaylist and the song would be played

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THANK YOU!