Enterprise Networking And Internet Security Computer Science Essay

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Telephone Set: electronic equipment that converts sound into electrical signals that can be transmitted over distances and then converts received signals back into sounds; andI talked to him on the telephone

Telephone Cable: The TAT series of cables constitute a large percentage of all North Atlantic cables. All TAT cables are consortia joint ventures between a number of telecommunications companies, e.g. British Telecom. CANTAT are transatlantic telephone cables terminating in Canada rather than the USA. There are a number of private non-TAT cables

A fax (short for facsimile) is a document sent over a telephone line. Fax machines have existed, in various forms, since the 19th century (see andHistoryand below), though modern fax machines became feasible only in the mid-1970s as the sophistication increased and cost of the three underlying technologies dropped. Digital fax machines first became popular in Japan, where they had a clear advantage over competing technologies like the teleprinter, since at the time (before the development of easy-to-use input method editors) it was faster to handwrite kanji than to type the characters. Over time, faxing gradually became affordable, and by the mid-1980s, fax machines were very popular around the world.

Provide a recommendation for these systems to purchase and give reasons for this recommendation:

Top web design agencies create a telephone system for required different equipments and these are implements for run that organizations telephone networking. However, for that telephone system must be purchase those (PBX, telephone sets, telephone cables, and others equipments).when I am purchase these equipments then consider different vendors equipments and these which features are available into this system. so when any organization are create a telephone system then must be follow these metters.at least I am recommending for telephone system always consider equipments and these features are available in your system.

The physical topology of a network refers to the configuration of cables, computers, and other peripherals. Physical topology should not be confused with logical topology which is the method used to pass information between workstations.

A bus topology connects computers along a single or more cable to connect linearly as figure 1. A network that uses a bus topology is referred to as a andbus networkand which was the original form of Ethernet networks. Ethernet 10Base2 (also known as thinnet) is used for bus topology.

A bus topology becomes slow by heavy network traffic with a lot of computer because networks do not coordinate with each other to reserve times to transmit.

It is difficult to troubleshoot a bus because a cable break or loose connector will cause reflections and bring down the whole network.

A star topology links the computers by individual cables to a central unit, usually a hub as in figure 2. When a computer or other networking component transmits a signal to the network, the signal travels to the hub. Then, the hub forwards the signal simultaneously to all other components connected to the hub. Ethernet 10BaseT is a network based on the star topology. Star topology is the most popular way to connect computers in a workgroup or departmental network.

A ring topology connects the computers along a single path whose ends are joined to form a circle as figure 3. The circle might be logical only but the physical arrangement of the cabling might be similar to star topology, with a hub or concentrator at the center. The ring topology is commonly used in token ring networks that the ring of a token ring network is concentrated inside a device called a Multistation Access Unit (MAU) and fiber Distributed Data Interface (FDDI) networks that the ring in this case is both a physical and logical ring and usually runs around a campus or collection of buildings to form a high-speed backbone network.

In a mesh topology, each computer on network has redundant data paths as showing in figure 4. The mesh topology provides fault tolerance-if a wire, hub, switch, or other component fails, data can travel along an alternate path. A diagram of a mesh network looks like a fishing net. A mesh topology is most often used in large backbone networks in which failure of a single switch or router can result in a large portion of the network going down.

A type of network topology in which a network that is based upon the physical star topology has one or more repeaters between the central node (the 'hub' of the star) and the peripheral or 'spoke' nodes, the repeaters being used to extend the maximum transmission distance of the point-to-point links between the central node and the peripheral nodes beyond that which is supported by the transmitter power of the central node or beyond that which is supported by the standard upon which the physical layer of the physical star network is based.

If the repeaters in a network that is based upon the physical extended star topology are replaced with hubs or switches, then a hybrid network topology is created that is referred to as a physical hierarchical star topology, although some texts make no distinction between the two

Their have many type of cables

Coaxial cable: Coaxial cable is the kind of copper cable used by cable TV companies between the community antenna and user homes and businesses. Coaxial cable is sometimes used by telephone companies from their central office to the telephone poles near users. It is also widely installed for use in business and corporation Ethernet and other types of local area network.

Finger: Coaxial cable

Optical fiber cable: An optical fiber cable is a cable containing one or more optical fibers. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable will be deployed.

Finger: Optical fiber cable

Category 5 cable: Category 5 cable is a twisted pair high signal integrity cable type often referred to as Cat5 or Cat-5. Most cables are unshielded, relying on the twisted pair design for noise rejection, and some are shielded. Category 5 has been superseded by the Category 5e specification structured cabling for computer networks such as Ethernet, and is also used to carry many other signals such as basic voice services\

Finger: Category 5 cable

Category 6 cable: commonly referred to as Cat-6, is a cable standard for Gigabit Ethernet and other network protocols that are backward compatible with the Category 5/5e and Category 3 cable standards. Compared with Cat-5 and Cat-5e, Cat-6 features more stringent specifications for crosstalk and system noise. The cable standard provides performance of up to 250 MHz.

Finger: Category 6 cable

Provide a recommendation for these systems to purchase and give reasons for this recommendation:

Top web design agencies create a telephone system for required different equipments and these are implements for run that organizations telephone networking. However, for that telephone system must be purchase those (PBX, telephone sets, telephone cables, and others equipments).when I am purchase these equipments then consider different vendors equipments and these which features are available into this system. so when any organization are create a telephone system then must be follow these metters.at least I am recommending for telephone system always consider equipments and these features are available in your system.

Task-3

I want to do set up a top web Network company. First I Created a internet Network. For set up I need sum tools. Those are very needful for making this intranet connection. Here, below listing those workings those are wanted for developed a company's intranet with a chart of cost. The item are listing below-

Web Server.

Mail Server.

21 PC's.

Switches.

Internet Connection.

Cables.

Fax

Intranet

Switch

Mail

Server

Web

Server

PC

PC

PC

ISP

Fig: Intranet

This requirements purchases cost chart are describing below

Hardware

Equipments Name

Quantity

Cost $

Web Server

1

$330

Mail Server

1

$112

PC

21

$12920

Switches

1

$1250

Intranet Running Cost Chart:

Running

Monthly Cost

Yearly Cost

Web Server

$83

$996

Mail Server

$67

$804

PC (21)

$81

$972

Bandwidth

$550

$66,000

Hardware Maintaining Cost Chart:

Maintaining

Monthly Cost

Yearly Cost

Mail Server

$150

$1800

Web Server

$60

$720

PC (21)

$40

$480

(b)

For set up a great relation to the client and web server and mail server I want to

be need set upped extranet. Here I want to rotate my intranet selection into the extranet. This are listing telling under-

The Benefit of Setup an Extranet: first for set up an extranet just join the ISP's line up into clients PC. In this extranet the web server need to be a ideal design. For shortest, that way live video call or audio chat also wanted the high speed bandwidth. If the video conferencing will break up, there needed to set up another option of chatting. Client has the power for updating regularly or accessing mail and web server. Both can share images and videos with this extranet opportunity. Same types of components are needed for making this extranet.

Intranet

Switch

Mail

Server

Web

Server

PC

PC

PC

ISP

Client Office

Switch

PC

PC

Fig: Extranet

(c)

Beside web development, the Top web Company also provides mail service. So a large amount of storage will require. Mail server and web server details given below.

Mail Server: Into this Top Web Company's mail server capacity is 500 GB. Client can access the mail server. The features of Top Web's mail server's are-

500 GB hard drive

Mail faltering support

Robust Email Security

Virus protected

Mailing list

Hassle-free migration

Advanced Emailing support.

Recommendation:

Providing a recommendation for how the intranet/extranet and storage should be set up and run, and give reasons for this recommendation:

Top web design agencies create an intranet and extranet for required different equipments and these are implements for run that organizations LAN networking. However, for that Network system must be purchase those (web server, Mail server, network cables, storage disk management for electronic files and others equipments).when I am purchase these equipments then consider different vendors equipments and these which features are available into this system. so when any organization are create a networking system then must be follow these metters.at least I am recommending for these system always consider equipments and these features are available in your system.

Task 04

Problem statement- Investigate the Internet connection requirement for Top Web.

Description the Internet service that may be required.

Explain the connection speeds that are suitable for these requirements.

Find examples of Internet Service Providers (ISPs) that can meet these requirements on your country.

Make a recommendation to use one particular ISP based upon the services offered and price charged.

a)

There are huge amount of bandwidth will require for video conference and internal communication. Because of the company has Intranet and Extranet network. By Extranet the company members will do video conference from client PC. In intranet company member communicate with each other. They establish internal communication by using bandwidth. On the other there is a vast amount of bandwidth will used for web development. The bandwidth measurement for 15 members given in table-

No

Member

Bandwidth speed

01

Project manager 01

512 kbps

02

Project manager 02

512 kbps

03

Graphic Designer 01

128 kbps

04

Graphic Designer 02

128kbps

05

Web Designer 01

256 kbps

06

Web Designer 02

256 kbps

07

Web Designer 03

256 kbps

08

Web programmer 01

256 kbps

09

Web programmer 02

256 kbps

10

Web programmer 03

256 kbps

11

Sales Assignment 01

128 kbps

12

Sales Assignment02

128 kbps

13

Sales Assignment03

128 kbps

14

Sales Assignment04

128 kbps

15

Clerical assignment

128 kbps

Other purpose:

No

Other purpose

Bandwidth speed

01

Web server purpose

1 mbps

02

Mail server purpose

1 mbps

03

Video conference

1mbps

b)

After establishing connection setting, I think all kinds of connection speeds are suitable for equipment. In web server I used 1mbps bandwidth speed. And in mail server I used also 1mbps bandwidth speed. Users can easily access in web server and access in main server. I think these are enough bandwidth for servers. I used 1mbps bandwidth speed for video conference. This is enough for video conference. I also located the member's bandwidth. The web designers and web programmers are using more bandwidth than other company members.

c)

Here some common Internet Service providers (ISPs) name given below-

Bangladesh Telecommunication Company Limited (BTCL)- It is mother ISP in Bangladesh. Here some activities given below-

Broadband connection over ADSL technology.

Dial-up Internet

Web and DNS hosting service

.bd domain service

Prepaid telephony

Prepaid service

PSTN network over hole country

Web mail service

Agni System Limited- Agni Systems Limited started ISP service in 1995. Initially only dial-up service was offered and later ADSL and wireless broadband was added. Here its common service given below-

Wireless broadband

Fiber broadband

Dial-up service

Web hosting

Web development

Aftab IT Limited- Aftab IT Limited is one of the Leading Internet and Intranet Service Provider in Bangladesh. Aftab IT can offer it's clients the required level of services that have stability, security, reliability and network coverage. Here some common services given below-

Corporate broadband solution

Network solution

VPN solution

Dial-up connection

Hosting

Domain registration

Bangladesh online Limited- It is the leading Internet Service Provider in the country. Since its commencement of commercial operation in December, 1999 BOL has been able to set an example of excellence with its subscribers with the help of updated technology and dedicated support service. Some services given below-

Domain registration

Hosting

Corporate broadband solution

Business e-mail

BracNet- BracNet is a joint company between BRAC and gNet DDH LLC, a San Francisco based consortium of investors and strategic partners. Its vision is to bring affordable data communication solutions to entire Bangladesh, by deploying state-of-the-art technology. Some common services are-

Broad connection

Dial-up connection

E-hut

Software and web development

Domain registration

Web hosting

Real time communication

Daffodil Online Limited- DOL provide a wide range of services like corporate web development, network solution, customized software development including major ISP activities. Some common activities-

Broadband connection

Dial-up connection

CCTV service

Web hosting

Network solution

Access Tel- AccessTEL is a tier-1 Broadband Service Provider and with an experienced team of industry experts, AccessTEL aims to lead the Broadband service provision of Internet Access, Corporate Private Networks (Intranet) and Corporate Broadcast services. Common activates are given below-

Broadband connection

Dial-up connection

Web and software solution

Bijoy Online Limited- Bijoy Online Ltd is one of the leading Internet Service Provider (ISP) in Bangladesh. Bijoy Online (BO) has started its operation in the year 1999 with the commitment of quality internet service at an affordable price. At the time of commencement Bijoy Online started with Dialup internet service with the state of art technology. Some common activities are given below-

Broad connection

VPN support

Hotspot solution

Hosting

Web development

BDCom Online Limited- BDCOM Online Limited is a trusted name for Internet Service, e-commerce Service, IT Infrastructure Development and Industry Standard Software. From the beginning BDCOM envisaged 'Total Excellence" as its principle for guiding light, around which revolves its entire spectrum of activities. With the unique vision, BDCOM is the forerunner in the value centric service Market place and an architect of high value end-to-end ICT solutions and software for both National and International market. Its services are given below-

Secure Network Solution

Internet Bandwidth

Data Communication Service

Virtual Private Network for Corporate

Complete Hosting Solution

Complete Email Solution

Co-location Service

Information Services Network (ISN) - Information Services Network (ISN) Limited established first ever 64 kbps VSAT transmitting and receiving data via a Hong Kong Gateway. It is one of leading company in Bangladesh. Some activates are given below-

Network solution

VPN solution

Software solution

Hardware solution

Antivirus solution

Recommendation:

I used the connection of Bangladesh Telecommunication Company Limited (BTCL) for the company. It is the mother ISP in Bangladesh. BTCL has a mandate to provide basic telecommunication services throughout the country. At present, BTCL is providing telephone service to about 1 million telephone subscribers down to upazila (thana) and growth centre level. Most of them can also use dial-up internet service. BTCL has the largest telecom infrastructure comprising of copper cabling, microwave links, satellite links, optical fibre networks etc. The call rates and internet rates are cheaper than those of other operators.  ADSL Broadband internet service is available now with present capacity of 33 thousands. Its services and price charge given bellow-

Service-

Broadband connection over ADSL technology.

Dial-up Internet

Web and DNS hosting service

.bd domain service

Prepaid telephony

Prepaid service

PSTN network over hole country

Web mail service

Charge-

Registration Fee (Non-Refundable): Tk. 20,000 (USD 285)

64 Kbps & 128 Kbps Tk. 84,000 (USD 1200)

Above 1 Mbps Tk. 231,000 (USD 3300)

Task 5

To: System Engineer

ABC company ltd.

From: System analyst

ABC company ltd.

Sub: write a report for top web design agencies networking system.

Task 1 is create a telephone network for top web design ltd and for these required different equipments and these purchases installed and provide these installation cost and operating cost.

Task 2 is creating a LAN for that Company. For this companies LAN networking need a topology and then implement that.

Task 3 is when creating an intranet and estranet then must be need server and hardware. Server configuration and storage file for disk spaces consider. When extending an extranet then how to user premises work.

Task 4 is for this companies networking requiring internet service these connection speed and Listing many ISP name and these to select any one ISP.at least when a ISP select then why you are select that ISP this reason are mentioned.

Assignment Strength:

This assignments have some strength these are when I am create a document for top web design agencies enterprise telephone network, LAN network then many important information are find out for that documentation. if I not physically work in the field but this documentation are very easy for creating a telephone and LAN network.

Assignment Weekness:

This assignment may have some weekness.these are may be error data colloction and others many problems.

Future plan:

For this assignment are have many feature plan. If I am unable to create a good documentation for top web design agencies reason time was limitation .so I am think for this documentation future time further developed.

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