Case study from McNurlin's Information systems managaement in practice book; 8th edition.

2. Group Members
 Md. Mahabubur Rahaman
 Rackib Jaman
 Marshal Richard
 Tushan Barai
 Mashook Mujib Chowdhury

3. Introduction
XYZ Company
 This is a fictitious case example of XYZ company, that
shows how a company might build a corporate
network from scratch utilizing the internet.(Basically
benefits of the internet)

4. Function of Telecommunication
 Visualization
1. Transmitting at the whopping speed of terabit over fiber
optic cable.
2. Twisted pair phone line coming into business as straw at a
operating speed DSL.
 Competitive Local Exchange Carrier’s (CLEC’s)
CLEC’s bring new connection system in 1990’s; such as cable
modem, optical fiber, wireless, satellite and faster wire line.

5. Internet & Telecommunication
 Internet actually started its journey in 1990’s by US
Department of Defense for their ARPANET
 Because of constant technological change managers
can’t concentrate on their strategy
 In late 90’s the page of internet became slower, so
managers get much time to use internet on their
operation

6. Internet’s Attributes
 Ubiquity (everywhere at once)
 Reliability
 Scalability
This norms makes today's life end to end IP network

7. XYZ Company
 XYZ Company which makes and sells widgets in the
process of installing a corporate network.
 CTO has to make a lots of decision
 That’s why he wants to introduce the Internet has a
heart of XYZ’s corporate operations

8. Network Options
 An intranet for use by employees
 An extranet for use by suppliers and some large
customers
 The Internet as the all important central public
network
He also creates computer based system where clients
and employees make a request from other computers
which responded by server computers

9. Serving remote users
 Every PC will be outfitted with a network interface
card (NIC) that lets it talk to the network.
 XYZ has four choices of communications wiring:
i.Twisted pair(the standard telephone line)
ii.Coaxial Cable (like cable TV)
iii.Fiber optic(glass fiber that carries signals
via light pulse, backbone networks)
iv. Wireless

10. Serving remote users(Contd.)
 For employees working from computers in their
homes, who need to transmit larger and larger files
such as PowerPoint and presentation, the CTO could
choose,
 DSL Modems
 Cable Modems

11. Serving remote users(Contd.)
 Finally they decide to connect these remote users to
the corporate network and provide the speed and
security they need. They have company supplied
laptops and PDAs.

12. Serving local users
 In the office, all the computers and telephones will be
connected directly to an always on LAN.
 The various LANs in XYZ’s offices will use three types
of computers to route traffic:
i. Hubs are repeaters
ii. Switcher are smarter
iii. Routers are smarter

13. Other’s network
 CTO wants to introduce Ethernet for sharing videos
and multimedia with employees at a specific time in
greater speed.
 LAN is always connected with Intranet which is
protected from outside Firewall
 It means “ A server lets email but doesn’t permit access
to application code”
 It is only accessible by the employees with their given
protected password and ID.

14. Intranet –Communicating between
offices
 To help XYZ employees communicate between sites
using WAN, the CTO set up a high speed
asynchronous transfer mode (ATM)-up to 622mbps.
ATM is used by telephone companies for their network
backbones. However, due to the high cost of ATM long
distance bandwidth, the CTO might not be able to
afford it.

15. Intranet –Communicating between
offices (contd.)
 Gigabit Ethernet which operates at speed of 1gbps
(10⁹bit per second), it has been outselling ATM
because it is less costly.

16. Network Advantages
 Communication
 Shared peripherals
 Shared data
 Flexible access
 Control of user access rights
 Centralized administration
 Simultaneous access to the Internet

17. Network Disadvantages
 Accidental deletion
 Deliberate damage
 Unauthorized access

18. Recommendations

20. Any Questions
?