Using Network Topologies To Create A Network Computer Science Essay

Investigate the possible web topologies and media that could be used to make the in-house web

( LAN ) for the Fire Department.

a ) Explain how the topologies operate.

B ) Explain the advantages and disadvantages of each medium.

degree Celsiuss ) Provide a recommendation for which topology and medium to utilize including grounds for this recommendation.

Problem Decomposition:

Bus, star, hub, intercrossed, mesh, tree topologies and web physical design. In Computer Networking “ topology ” refers to the layout or design of the affiliated devices. Network Topologies can be physical or logical. Hear I will exemplify on the different types of the topologies, and how it run.

Computer web topologies can be categorized in the undermentioned classs.

aˆ? Bus

aˆ? Star

aˆ? Ringing

aˆ? Mesh

aˆ? Tree

Bus topology.

Bus webs ( non to be confused with the system coach of a computing machine ) use a common anchor to link all devices. A individual overseas telegram, the anchor maps as a shared communicating medium that devices attach or tap into with an interface connection

Bus topology

Star Topology

Many place webs use the star topology. A star web features a cardinal connexion point called a “ hub ” that may be a hub, switch or router. Devices typically connect to the hub with Unshielded Twisted Pair ( UTP ) Ethernet.

Star topology

Ringing Topology

In a ring web, every device has precisely two neighbours for communicating intents. All messages travel through a ring in the same way ( either “ clockwise ” or “ counterclockwise ” ) .

Figure: Ring Topology

Mesh Topology.

Mesh topologies involve the construct of paths. Unlike each of the old topologies, messages sent on a mesh web can take any of several possible waies from beginning to finish

Figure: Mesh topology

Tree Topology

Tree topologies integrate multiple star topologies together onto a coach. In its simplest signifier, merely hub devices connect straight to the tree coach, and each hub maps as the ” root ” of a tree of devices.

Figure: Tree Topology

Explain the advantages and disadvantages of each medium

Bus Topology

Advantages of Bus Topology

It is easy to manage and implement.

It is best suited for little webs.

Disadvantages of Bus Topology

The overseas telegram length is limited. This limits the figure of Stationss that can be connected.

This web topology can execute good merely for a limited figure of nodes.

Ringing Topology

Advantage of Ring Topology

The information being transmitted between two nodes base on ballss through all the intermediate nodes. A cardinal waiter is non required for the direction of this topology.

Disadvantages of Ring Topology

The failure of a individual node of the web can do the full web to neglect.

The motion or alterations made to web nodes affects the public presentation of the full web.

Mesh Topology

Advantage of Mesh Topology

The agreement of the web nodes is such that it is possible to convey informations from one node to many other nodes at the same clip.

Disadvantage of Mesh Topology

The agreement wherein every web node is connected to every other node of the web, many of the connexions serve no major intent. This leads to the redundancy of many of the web connexions.

Star Topology

Advantages of Star Topology

Due to its centralised nature, the topology offers simpleness of operation.

It besides achieves an isolation of each device in the web

Disadvantage of Star Topology

The web operation depends on the operation of the cardinal hub. Hence, the failure of the cardinal hub leads to the failure of the full web

Problem Decomposition: Degree centigrade

Considerations When Choosing a Topology

It is hard to specify recommendation for which topology and medium should be set up, When Choosing a Topology. Following things should be keep in head before set up a web topology. More of all time every topology has some weak cape, beside advantages.

Fire section demand a random entree and power web.Because information is really of import hear. So better should be maintain on an oculus the the affair of Scalability and dependability. If we think about that mater so star topology is good as per my thought.

Another ground is that, this web is easy to put in, and do constellation. Robust as failure of one nexus does non impact the full system. The staying system will be active

Undertaking 2

Problem Statement:

Investigate the Internet connexion demands for the Fire Department.

a ) Describe the Internet services that may be required.

B ) Explain the connexion velocities that are suited for these demands.

degree Celsius ) Find illustrations of Internet Service Providers ( ISPs ) that can run into these demands in your state.

vitamin D ) Make a recommendation to utilize one ISP based upon the services offered and monetary value charged.

Problem Decomposition:

Internet connexion demands for the Fire Department.

Broadband Internet Connect wire less connexion

Broadband Modem GSM modem

Router Wireless router Antenna

Network Interface Card radio Interface card.

Ethernet Cable

Problem Decomposition: a

Internet services that may be required are given hollas.

VOIP

World wide web

File transfer protocol

Download

Upload

Internet Fax.

Video chat picture conference.

Instantaneous messaging

Problem Decomposition B

Harmonizing to the old point it doest demand to necessitate more so 8 Mbps, for the fire section.

My atonement is goes hear.

Fire can be explore everyplace at a same clip in different different topographic point.

So people who are wanted so direct the study or intelligence to the fire section are

Continuous directing the intelligence from different ways. Such as phone call, picture call.

Fax, Voip, etc. To avoid line busy it should supply a smooth Internet connexion, for

Easy entree. That all the people can acquire the line at one opportunity to direct the message.

So it would be better to utilize 8Mbps for the fire section.

Problem decomposition: Degree centigrade

There are Some ISP company provides 8Mbps. They are,

B.O.L Bangladesh online. ( Gulshan, Bangladesh )

Bangla king of beasts, ( Gulshan )

Bijoy. ( Gulshan )

Bracnet ( Mohakhali Dhaka )

Daffodils online. ( Dhanmondi )

NB. Bangla king of beasts is one of the fastest cyberspace ( WiMax ) service suppliers in Bangladesh.

Problem Decomposition: Calciferol

A recommendation to utilize one ISP based upon the services offered and monetary value

No

Seed

Monthly subscription ( TK )

Monthly use

1

128 Kbps

600

Unlimited

2

256 Kbps

1000

Unlimited

3

512 Kbps

800

5 GB

4

512 Kbps

1250

Unlimited

5

512 Kbps

1450

10 GB

Figures: offered and pricelist

Undertaking 3

Problem Statement:

Investigate the methods the Fire Department could implement for bipartisan voice

Communicationss. As a minimal include the undermentioned information:

a ) How each method works ( frequences, full/half semidetached house, etc )

B ) Details of the legal demands for runing the system in your state ( e.g. allotment of Frequencies, licensing demands, etc ) .

degree Celsiuss ) Costss of puting up and runing the system, including licensing costs, equipment costs, etc.

vitamin D ) Restrictions of each method ( intervention, scope, etc ) .

vitamin E ) Supply a recommendation for how voice communications should be set up and run including grounds for this recommendation.

Problem Decomposition: a

Frequencies:

A wireless moving ridge is an electromagnetic moving ridge propagated by an aerial. Radio moving ridges have different frequences, and by tuning a wireless receiving system to a specific frequence you can pick up a specific signal.

Figure: Frequencies

One-half semidetached house:

A half-duplex system provides for communicating in both waies, but merely one way at a clip ( non at the same time ) . Typically, one time a device having a signal, it must wait for the sender to halt transmission, before answering aerials are of trans-receiver type in these devices, so as to convey and have the signal as

Figure: One-half semidetached house.

Full Duplex:

Full semidetached house, let both companies to talk and be heard at the same clip. A good analogy for a full-duplex system would be a two-lane route with one lane for each way.

Full semidetached house let this happen at the same time

Figure: Full semidetached house

Problem decomposition B

The Details legal demand for Licensing is given holla.

As per determination of Bangladesh Telecommunication Regulatory Commission, all Domestic Data Communication Service Provider ( DDCSP ) Licenses have been converged with Nationwide Internet Service Provider ( ISP ) Licenses.

Under the new Nationwide Internet Service Provider ( ISP ) License, the Licensee shall be authorized to construct, keep, run and supply Internet Service and Domestic Data Communication Service of point-to-point Domestic Data Circuit ( excepting Voice Communication ) throughout Bangladesh, capable to applicable Torahs every bit good as the footings and conditions of the new Nationwide Internet Service Provider ( ISP ) License.

All the DDCSP Licensees and DDCS User Permission Holders are exempted from doing payment of any charge or license fee to the Commission in relation to the aforesaid convergence and/or their old DDCSP License and DDCS User Permission.

Allotment of frequence

Power

Telephone

Revolving generators

Musical instruments

Voice mikes

Twisted brace communicating

Co-axial overseas telegram communicating

Radio

Television

Electronic tubings

Integrated circuits

Cellular telephone

AM Radio

FM Radio

Tellurian transmittal

Satellite transmittal

Microwave

Radar

Microwave aerial

Infrared

Laser

Visible visible radiation

Optical Fiber

102

103

104

105

106

107

108

109

1010

1011

1012

1013

1014

1015

Elf

VF

Very low frequency

Low frequency

Maine

Hafnium

Hemorrhagic fever

Ultrahigh frequency

Superhigh frequency

Extremely high frequency

Infrared Lasers Guided missiles Rangefinders

Visible visible radiation

Optical

fibre

Power and telephone

Revolving generators

Musical instruments

Voice mikes

twisted brace

Radio

Radios and telecasting

Electronic tubings

Integrated circuits

Cellular telephone

Coaxial overseas telegram

AM wireless FM wireless

and Television

Microwave

Radar

Microwave aerials

Magnetrons

Tellurian

and orbiter

transmittal

Wavelength 106 105 104 103 102 100 1 0-1 10-2 10-3 10-4 10-5 10 -6

in infinite

( Meters ) ELF = Highly low frequence ME + Medium frequence UHP = Ultra high frequence

VF = Voice frequence HF = High frequence SHF = Super high frequence

VLF = really low frequence VHF = really high frequence EHF = Highly high frequence

Lf = Low frequence

Figure: Allotment of frequence

Problem decomposition: Degree centigrade

Costss of puting up and runing the systems,

Licensing costs, 1000000.00 Taka

Equipment costs 500000.00 Taka.

Problem decomposition: Calciferol

Restriction of the wireless internet Security concerns

It is simple to put Wi-Fi web but maintaining it procure takes much more attempt, Access points of Wi-Fi do non deploy encoding methods. It is required to be done as web is enabled. Secure Wi-Fi web can be easy attacked by hackers to steal private information.

Restriction of intervention WiFi concern

Wi-Fi transmits informations at 2.4 GHz doing susceptible to interfere Bluetooth enabled devices, nomadic phones, cordless, Microwaves and other communicating devices, closer the interfering devices are the hapless communicating will be and frailty versa.

Noise:

In common usage, the word noise means any unwanted sound. In both parallel and digital electronics, noise is an unwanted disturbance to a wanted signal ; it is called noise as generalisations of the hearable noise heard when listening to a weak wireless transmittal.

Echo

In audio signal processing and acoustics, an reverberation is a contemplation of sound, geting at the hearer some clip after the direct sound. Typical illustrations are the reverberation produced by the underside of a well, by a edifice, or by the walls of an enclosed room. A true reverberation is a individual contemplation of the sound beginning. The clip hold is the excess distance divided by the velocity of sound.

Problem Statement: vitamin E

Supply a recommendation for how voice communications should be set up and run including grounds for this recommendation.

Problem Decomposition:

The procedure of puting up voice communicating.

1 Setup Computer, install Operating systems, General Physical Network Connection

2. Choosing IP Addresses for Machines

3. Configuring TCP/IP, Configure Router, Hub, Modem, And Wireless Antenna.

4. Testing the TCP/IP Connection

5. Install the radio Antenna

6. Check the Antenna.

7. Install Microphone, Head set, PABX, Land phone.

8. Install others necessary Software /OS

Undertaking 4

Problem Statement:

Investigate telephone systems available in your state for single-site organisations like the Fire

Department. Pay peculiar attending to:

a ) The chief equipment that would be installed.

B ) The characteristics available with each system.

degree Celsius ) The cost of equipment and installing.

vitamin D ) The cost of runing the system.

vitamin E ) Supply a recommendation for which systems to buy including grounds for this recommendation

Problem Decomposition:

After look into a individual site organisation for the telephone systems I found some,

Necessary Equipment, that are use to run a telephone systems. Which is listed bellow?

PBX

Telephone

Feature of PABX:

Communication system with Feature:

A little office PBX phone system is incorporated with all the complex characteristics of a traditional PBX system so every bit to supply the organisation the image of a large corporate. The companies are greeted with professional sounding salutation messages.

The characteristics incorporated are car attender, voice mail, facsimile to e-mail, company ID, happen me follow me name forwarding, call queuing, web disposal and many more to assist administrate the calls in a adept mode. The system is besides provided with a bill of fare of options such as dial by name, dial by extension and nothing out to populate operator. The installation to route calls to other phone Numberss of the employees, including their cell phones, helps to reply the calls irrespective of their geographical location.

No demand to put in dearly-won equipment:

The chief advantage of holding a little office phone system with PBX characteristics is that it is possible to keep multiple extensions with a individual telephone connexion. The little office phone system with PBX characteristics does non necessitate any new equipment to be installed in your office as in the instance of the other conventional phone systems. The service suppliers maintain all the equipments at their site and offer PBX services through a hosted waiter at fixed monthly rents.

Establish a practical office with local phone figure:

With the PBX featured little office phone system, making concern presence in any coveted location is instead effortless. Introducing subdivisions in all locations is expensive and consumes considerable clip, so it is best to set up a practical presence by availing of local phone Numberss. Through this, the companies are able to do long distance calls at local rates. If required, you can foster heighten your concern with toll free Numberss every bit good.

Land phone characteristic:

The chief characteristic of landline phones is their easiness of usage. Anyone can pick up a receiving system, punch seven Numberss and connect to one ‘s friends, co-workers and concern spouses within seconds. Old phones used to hold dials and people used to despite this cumbrous process but they have long since given manner to modern phones with digital dialing options. Voice dial is now widely available on these phones so you do non hold to worry about pluging Numberss and exercising force per unit area on your fingertips.

One can besides utilize the memory map of the phone to salvage Numberss. The individual will merely hold to shop through the memory and dial that figure. Caller designation is now considered an old characteristic of these phones although it is still used widely. It is passing for avoiding peculiar calls or testing the calls you choose to reply

Some others feature. ( Modern phone )

Answering machine maps

Distant supervising of the full system

Automatic call accounting

Speed dialing

Caller ID

The seashore of the equipment

PBX 30000 TK ( measure 1 ) ( theoretical account, Aastra 5000 )

Land phone: 25000 ( measure =15 )

Installation 2000 TK ( some clip free depending on company policy )

The seashore of the operating systems

Employee seashore 15000 Taka

Security seashore 5000 Taka

Kept up 2000 Taka

Office rent 10000 Taka

Undertaking 5

Problem Statement:

The Fire Department needs to stay operational in the event of a serious incident such as a major Terrorist onslaught or war. Explain the steps you would set in topographic point that would let the Fire Department to run in the event of Newtown holding no electrical power and fixed telephone lines being broken.

Problem Decomposition:

Harmonizing to above Problem, It will be best to set up Live Broad projecting systems for the victim country ( war errorist onslaught ) this is the best manner to pass on that sort of state of affairs. It is less expensive but really effectual.

1. Live Television Broadcasting

Live telecasting refers to telecasting broadcast in existent clip. Today it is used largely for plans such as Today, CNN This Morning, and local telecasting intelligence.

Live telecasting is today most common in telecasting intelligence, where intelligence plans are by and large broadcast unrecorded, showing recorded and edited intelligence narratives. Events that webs and Stationss decide most viewing audiences will desire to or should cognize about every bit shortly as possible are broadcast unrecorded, frequently disrupting on a regular basis scheduled scheduling, as intelligence bulletins, and if they are rapidly altering and developing, with coverage as they unfold as “ interrupting intelligence ” narratives. There is normally a 75-90 2nd hold between what is really being filmed and what is being broadcast ;

In general unrecorded telecasting was more common for airing content produced specifically for telecasting in the early old ages of the medium, before engineerings such as videotape recording appeared.

Figure: Television Broadcasting systems

2. Wireless Internet Access

Wireless Internet entree makes nomadic email entree and Web seeking possible from phones and rolling nomadic computing machines. Wireless Internet services have been available for old ages but are now going easier to happen and more low-cost. The term nomadic broadband refers to high-velocity wireless Internet connexions and services designed to be used from arbitrary locations. Mobile broadband engineerings include EV-DO, HSPA, WiMax and LTE. Beside phones, Internet and web entree utilizing these engineerings is progressively being incorporated into laptop computing machines, cars and public transit.

Figure: Wireless Internet Access

3. Satellite InternetA Access

Using a little dish aerial and orbiter modem, satellite Internet entree is available in about all rural countries non serviced by other engineerings Satellite Internet is a signifier of high-velocity Internet service. Satellite Internet entree runs over telecommunications orbiters in Earth orbit to supply wireless connectivity to residential and concern consumers.

Satellite Internet service covers countries where DSL and overseas telegram entree is unavailable. Satellite offers less web bandwidth compared to DSL or overseas telegram, nevertheless. In add-on, the long holds required to convey informations between the orbiter and the land Stationss tend to make high web latency, doing a sulky public presentation experience in some instances. Network applications like VPN and on-line gambling may non work decently over satellite Internet connexions due to these latency issues.

Figures: Satellite InternetA Access

4. Cellular InternetA Access

Cellular engineering provides wireless Internet entree through cell phones. Cell phones can be used as modems to link computing machines to the Internet. Cellular cards and routers besides exist. Cell connexions can be a convenient manner to acquire on-line while going but are typically slower than other signifiers of broadband Internet. WAP – Wireless Application Protocol – supports development of Web-based applications that run over radio webs. Cellular modems are an alternate to these other types of web modems. They enable computing machines and other devices for Internet entree. Alternatively of linking to some overseas telegram that serves as the web pipe, though, cellular modems communicate over wireless links to the Internet via cell phone towers. Using cell modems offers several benefits over other modems

Figure: Cellular InternetA Access

Undertaking 6

Problem Statement:

Make a comprehensive, professional study depicting your web recommendations. This should include the inside informations of Tasks 1 – 5, have estimations of cost throughout and have an executive sum-up at the start giving the cardinal points.

Problem Statement:

.Network topology is the layout form of interconnectednesss of the assorted elements ( links, nodes, etc. ) of a computing machine web. Network topologies may be physical or logical..

Computer web topologies can be categorized in the undermentioned classs.

Bus

Star

Ringing

Mesh

Tree.

.

Bus Topology:

A individual overseas telegram, the anchor maps as a shared communicating medium that devices attach or tap into with an interface connection. A device desiring to pass on with another device on the web sends a broadcast message onto the wire that all other devices see, but merely the intended receiver really accepts and processes the message.

Advantages and disadvantages of coach topology

Advantages of Bus Topology

It is easy to manage and implement.

It is best suited for little webs.

Disadvantages of Bus Topology

The overseas telegram length is limited. This limits the figure of Stationss that can be connected.

This web topology can execute good merely for a limited figure of nodes.

Star topology

In local country webs with a star topology, each web host is connected to a cardinal hub. In contrast to the coach topology, the star topology connects each node to the hub with a point-to-point connexion. All traffic that traverses the web passes through the cardinal hub. The hub Acts of the Apostless as a signal supporter or repeater. However, the full web besides fails. )

Advantages and disadvantages of star topology

Advantages of Star Topology

Due to its centralised nature, the topology offers simpleness of operation.

It besides achieves an isolation of each device in the web.

Disadvantage of Star Topology

The web operation depends on the operation of the cardinal hub. Hence, the failure of the cardinal hub leads to the failure of the full web.

Ringing topology

Ringing topologies typically utilize a nominal passing strategy, used to command entree to the web. By using this strategy, merely one machine can convey on the web at a clip. The machines or computing machines connected to the ring act as signal supporters or repeaters which strengthen the signals that traverse the web. The primary disadvantage of pealing topology is the failure of one machine will do the full web to neglect

Advantages and disadvantages of Ring topology.

Advantages of Ringing topology:

The information being transmitted between two nodes base on ballss through all the intermediate nodes. A cardinal waiter is non required for the direction of this topology.

Disadvantages of pealing topology:

The failure of a individual node of the web can do the full web to neglect. The motion or alterations made to web nodes affects the public presentation of the full web.

Mesh Topology:

Unlike each of the old topologies, messages sent on a mesh web can take any of several possible waies from beginning to finish. ( Recall that even in a ring, although two overseas telegram waies exist, messages can merely go in one way. ) The value of to the full meshed webs is relative to the advocate of the figure of endorsers, presuming that pass oning groups of any two end points, up to and including all the end points

Advantages of Mesh topology:

No traffic job as there are dedicated links.A Robust as failure of one nexus does non impact the full system. Security as information travels along a dedicated line. Points to indicate links make mistake designation easy.

Disadvantages Mesh topology:

Mesh topology wiring which is hard. To pull off. Installation is complex as each node is connected to every node

Tree topology:

The type of web topology in which a cardinal ‘root ‘ node ( the top degree of the hierarchy ) is connected to one or more other nodes that are one degree lower in the hierarchy with a point-to-point nexus between each of the 2nd degree nodes and the top degree cardinal ‘root ‘ node.

The cyberspace service that that required:

VOIP: Voice over Internet Protocol ( Voice over IP, VoIP ) is a general term for a household of methodological analysiss, communicating protocols, and transmittal engineerings for bringing of voice communications and multimedia Sessionss over Internet Protocol ( IP ) webs, such as the Internet

World wide web:

The World Wide Web, abbreviated as WWW and normally known as the Web, is a system of interlinked hypertext paperss accessed via the Internet. With a web browser, one can see web pages that may incorporate text, images, pictures, and other multimedia and navigate between them by utilizing hyperlinks

FTP File Transfer Protocol ( FTP ) is a standard web protocol used to copy a file from one host to another over a TCP/IP-based web, such as the Internet. FTP is built on a client-server architecture and utilizes separate control and informations connexions between the client and waiter

Download:

The usage of the footings downloading frequently implies that the information sent or received is to be stored for good. In contrast, the term downloading is distinguished from the related construct of cyclosis, which indicates the receiving of informations that is used nigh instantly as it is received.

Upload

When there is a transportation of informations from a distant system to another distant system, the procedure is called “ uploading ” . This is used by some online file hosting services.

Internet Fax:

Internet facsimile uses the Internet to have and direct facsimiles. Internet faxing ( or “ on-line faxing ” ) is a general term which refers to directing a papers autotype utilizing the Internet, instead than utilizing merely phone webs ( traditional faxing ) with a facsimile machine. .

Depending on the specific method/implementation ( see below ) , advantages of utilizing the Internet can include.

Video conference.

A videoconference or picture conference ( besides known as a picture teleconferencing ) is a set of synergistic telecommunication engineerings which allow two or more locations to interact via bipartisan picture and audio transmittals at the same time. It has besides been called ‘visual coaction ‘ and is a type of groupware.

Instantaneous messaging:

Instantaneous messaging ( IM ) is a signifier of real-time direct text-based communicating between two or more people utilizing personal computing machines or other devices, along with shared package clients. The user ‘s text is conveyed over a web, such as the Internet. More advanced instant messaging package clients besides allow enhanced manners of communicating, such as unrecorded voice or picture naming.

A recommendation for ISP service charged ( Bangla king of beasts )

No

Seed

Monthly subscription ( TK )

Monthly use

1

128 Kbps

600

Unlimited

2

256 Kbps

1000

Unlimited

3

512 Kbps

800

5 GB

4

512 Kbps

1250

Unlimited

5

512 Kbps

1450

10 GB

ISP Licensing demand:

As per determination of Bangladesh Telecommunication Regulatory Commission, all Domestic Data Communication Service Provider ( DDCSP ) Licenses have been converged with Nationwide Internet Service Provider ( ISP ) Licenses.

Under the new Nationwide Internet Service Provider ( ISP ) License, the Licensee shall be authorized to construct, keep, run and supply Internet Service and Domestic Data Communication Service of point-to-point Domestic Data Circuit ( excepting Voice Communication ) throughout Bangladesh, capable to applicable Torahs every bit good as the footings and conditions of the new Nationwide Internet Service Provider ( ISP ) License.

All the DDCSP Licensees and DDCS User Permission Holders are exempted from doing payment of any charge or license fee to the Commission in relation to the aforesaid convergence and/or their old DDCSP License and DDCS User Permission.

Restriction of: Noise, Echo,

Noise:

In common usage, the word noise means any unwanted sound. In both parallel and digital electronics, noise is an unwanted disturbance to a wanted signal ; it is called noise as generalisations of the hearable noise heard when listening to a weak wireless transmittal.

Echo

In audio signal processing and acoustics, an reverberation is a contemplation of sound, geting at the hearer some clip after the direct sound. Typical illustrations are the reverberation produced by the underside of a well, by a edifice, or by the walls of an enclosed room. A true reverberation is a individual contemplation of the sound beginning. The clip hold is the excess distance divided by the velocity of sound.

Set up procedure voice communicating

Broadband Internet Connect wire less connexion

Broadband Modem GSM modem

Router Wireless router Antenna

Network Interface Card radio Interface card.

Ethernet Cable

The ISP Company:

Brac Net. ( Mohakhali )

Bijoy. ( Gulshan )

Banglalion ( Gulshan )

Daffodils online ( Dhanmondi )

Banglalion ( Gulshan )

Frequencies, half semidetached house, full semidetached house.

A wireless moving ridge is an electromagnetic moving ridge propagated by an aerial. Radio moving ridges have different frequences, and by tuning a wireless receiving system to a specific frequence you can pick up a specific signal the period is the continuance of one rhythm in a repeating event, so the period is the reciprocal of the frequence. For cyclical procedures, such as rotary motion, oscillations, or moving ridges, frequence is defined as a figure of rhythms per unit clip. In natural philosophies and technology subjects, such as optics, acoustics, and wireless, frequence is normally denoted by a Latin missive degree Fahrenheit or by a Grecian missive V ( nu )

A half-duplex

System provides for communicating in both waies, but merely one way at a clip ( non at the same time ) In automatically-run communications systems, such as bipartisan data-links, the clip allotments for communications in a half-duplex system can be steadfastly controlled by the hardware. Therefore, there is no waste of the channel for exchanging. For illustration, station A on one terminal of the informations nexus could be allowed to convey for precisely one second, and so station B on the other terminal could be allowed to convey for precisely

One second. And so this rhythm repeats over and over once more.

Full- Duplex:

A full-duplex, or sometimes double-duplex system, allows communicating in both waies, and, unlike half-duplex, allows this to go on at the same time. Land-line telephone webs are full-duplex, since they allow both companies to talk and be heard at the same clip. A good analogy for a full-duplex system would be a two-lane route with one lane for each way. Examples: Telephone, Mobile Phone, etc.

Detailed demand for ISP licensing:

As per determination of Bangladesh Telecommunication Regulatory Commission, all Domestic Data Communication Service Provider ( DDCSP ) Licenses have been converged with Nationwide Internet Service Provider ( ISP ) Licenses.

Under the new Nationwide Internet Service Provider ( ISP ) License, the Licensee shall be authorized to construct, keep, run and supply Internet Service and Domestic Data Communication Service of point-to-point Domestic Data Circuit ( excepting Voice Communication ) throughout Bangladesh, capable to applicable Torahs every bit good as the footings and conditions of the new Nationwide Internet Service Provider ( ISP ) License.

All the DDCSP Licensees and DDCS User Permission Holders are exempted from doing payment of any charge or license fee to the Commission in relation to the aforesaid convergence and/or their old DDCSP License and DDCS User Permission.

Explain my opinionmeasure, that I take action to let a fire section to run the event of a town holding no electricity besides broken telephone line.

Live Television Broadcasting

Live telecasting refers to telecasting broadcast in existent clip. Today it is used largely for plans such as Today, CNN This Morning, and local telecasting intelligence.

Live telecasting is today most common in telecasting intelligence, where intelligence plans are by and large broadcast unrecorded, showing recorded and edited intelligence narratives. Events that webs and Stationss decide most viewing audiences will desire to or should cognize about every bit shortly as possible

Wireless Internet Access

Wireless Internet entree makes nomadic email entree and Web seeking possible from phones and rolling nomadic computing machines. Wireless Internet services have been available for old ages but are now going easier to happen and more low-cost. The term nomadic broadband refers to high-velocity wireless Internet connexions

Decision:

Completing this work I have a good thought and experience about researching, making studies, work outing jobs, utilizing web topology diagram, communicating diagram, pricelist, etc. diagram On art gallery I was required to finish for my assignment. During the completion of the work, I have to confront many jobs and I think I have tried my best to get the better of these jobs

.