Expert answer:Design Requirements
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case_study_world_wide_trading_companyv2.docx
design_requirements.docx
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Background Information for World-Wide Trading Company
World-Wide Trading (WWTC) is a large online broker firm in the Hong Kong. The trading
company has a staff of 9,000 who are scattered around the globe. Due to aggressive growth in
business, they want to establish a regional office in New York City. They leased the entire floor
of a building on Wall Street. You were hired as the director of the IT Department. The President
of the company asked you to set up the state of the art network by end of this year. He shared
with you the organizational structure and a list of the staff. You hired a consultant to test the
network infrastructure and power requirement at WWTC office space. The consultant reported
that the network infrastructure is solid and gigabit network can be set up on existing network
wiring. Also, the existing power supply will meet their current and future demand. The President
has reiterated these business goals.
Business and Technical Goals
▪
▪
▪
▪
▪
▪
▪
Increase revenue from 10 billion to 40 billion in three to four years
Reduce the operating cost from 30 to 15 percent in two to three years by using an
automated system for buying and selling.
Provide secure means of customer purchase and payment over Internet.
Allow employee to attach their notebook computers to the WWTC network and Internet
services.
Provide state of the art VoIP and Data Network
Provide faster Network services
Provide fast and secure wireless services in the lobby and two large conference rooms
(100×60)
On the basis of these business goals, you prepared a RFP to solicit a proposal for designing and
implementing a fast, reliable and secure network.
The purpose of this Request for Proposal is to solicit from qualified vendors proposals for a
secure and fast network to ensure proper operation of the network.
To prepare a design for a state of the art network at the Wall Street location of World-Wide
Trading.
Propose a Network design that solves the current security audit problems (see security sections),
to meet business and technical goals.
Provide a modular, scalable and network.
Provide redundancy at building core layer and building distribution layer and access layer and at
workstation level to avoid failure at one point. For Building Access layer provide redundant
uplinks connection to Building Distribution layer.
Select appropriate Cisco switch model for each part of your enterprise campus model design
from the Cisco Products Link, and use the following assumptions in your selection process.
Selecting the Access layers switches:
a. Provide one port to each device
b. Make provision for 100% growth
Server farm switches
• Assume 6 NIC cards in each server and one NIC card uses one port of switch
• Dual processors and dual power supply
Propose an IP addressing redesign that optimizes IP addressing and IP routing (including the use
of route summarization). Provide migration provision to IPv6 protocol in future.
Propose a High Level security plans to secure key applications and servers but encryption of all
application is not acceptable. Develop security policy to stop sniffing and man-in-the-middle
attack. Your security plan must be based on current industry standards. Multilayer security or
defense-in-depth.
Integrate voice and data network to reduce cost. For dialing outside, the World-Wide Trading
Company proposes a plan for 100% connectivity with a minimum number of outside lines. For
telephone requirements, see the Organization Chart and Telephone Equipment Table.
Provide aggregate routing protocols with hierarchal IP scheme.
Centralize all services and servers to make the network easier to manage and more cost-effective.
Provide LAN speed minimum 100 MB and Internet speed minimum 54 MB.
Provide wireless network access to network users and guest users in limited area (Lobby and
Conference room). In conference room and the lobby, the user will get a minimum 54 Mbps of
bandwidth. (You can assume that site survey is done and no sources of interference or RF were
discovered.)
Provide provisions for video conference and multicast services.
Standardize on TCP/IP protocols for the network. Macintoshes will be accessible only on guest
notebook but must use TCP/IP protocols or the Apple Talk Filling Protocol (AFP) running on
top of TCP.
Provide extra capacity at switches so authorized users can attach their notebook PCs to the
network
Install DHCP software to support notebook PCs
The World-Wide Trading Company will use the following applications:
▪ Microsoft Office 2014
▪ Sending and receiving e-mail
▪
▪
▪
Surfing the Web using Netscape or Microsoft’s Internet Explorer applications to access
information, participate in chat rooms, and use other typical Web services
Accessing the library card-catalog
File Server application.
Associate will use the following Custom Applications
▪ Market Tracking Application. This application will provide real-time status of stock
and bond market to brokers and their clients.
▪ Stock and Bond Analytical Application. This application will provide analysis of stock
and Bond to Brokers only.
▪
On Line Trading. The Company wishes to train new clients in online trading to attract
new customer. The Company will sign up new client to receive streaming video and
instructions
2. Assume any information (with proper justification) which you think is missing and
critical to the development of the design.
WWTC Security:
Although WTC has strong security requirements at other locations (see network diagram below),
you will need to move to a significantly more secure network than WTC currently has available.
At other places, lack of strong authentication, data confidentiality and separations between
internal protected server and public server are principal areas that need to improve at this
location.
Audit results of other locations identified the following problems
• E-mail had been inappropriately used at times to communicate Business sensitive
information.
• Confidential business information and public data were connected to the same physical
network.
• End users systems had inappropriately housed confidential data should have resided only
on servers. In addition, some of the end-user systems were found to be laptops, which had
left the facility in clear violation of security policies.
• Some logical control systems were found to rely on username and password
combinations only.
• Some sensitive business information was found to be transmitted in clear text between
server and client.
In order to address these audit findings, you decided to firm up security policies in these areas.
Internet Connectivity
Internet connectivity and any other unclassified network must be physically separate
from the network
Classified Network
The classified network must be physically secure to prevent any access to the classified
network’s data. Control should be put in place to prevent local users from removing data
from the systems in any way. This includes removable media, AV recorders, pen and
paper, and any form of printer.
All data transmitted on the classified network must be cryptographically protected
throughout the network. All classified data must be centrally stored and secured in a
physically separate area from the unclassified network.
WAN Connectivity
In addition to the cryptographic protections of the data within the classified network, all
data crossing wide-area links should undergo another layer of cryptographic protection
such as IPSec/VPN/SSL.
Public Servers
All public servers must configured HTTPS connections and accept all requests that are on
valid IP addresses and pass through firewall. Server must ask some identity of the
connecting party.
Site-to-site VPN tunnels
All devices must be mutually authenticated and cryptographic protection should be
provided.
PSTN dial-up
Dial-up client must authenticate with username and OTP
User Education
All users should undergo periodic user awareness training program on network threats
and good security practices.
Deliverables
These are only recommendations on the general approach you might take for this project.
1.
2.
3.
4.
5.
6.
Determine the most important assets of the company, which must be protected
Determine general security architecture for the company
Develop a list of 12specific policies that could be applied.
Write specific details along with the rationale for each policy
Integrate and write up the final version of the Security Policy Document for submittal
Develop a High availability secure design for this locations addressing above
considerations and mitigating 4 primary networks attacks categories mentioned below.
The Four Primary Attack Categories:
• Reconnaissance attacks: An intruder attempts to discover and map systems, services, and
vulnerabilities.
• Access attacks: An intruder attacks networks and systems to retrieve data, or gain access,
or escalate access privileges
• Denial of Service attacks: An intruder attacks your network in a way that damages or
corrupts your computer system or denies you and others access to your networks, system,
or services.
• Worms, viruses, and Trojan horses: Malicious software is inserted onto a host in order to
damage a system, corrupt a system, replicate itself, or deny services or access to
networks, system or services.
The following are the guidelines for security policies.
Security Policies:
•
•
•
•
•
•
Policies defining acceptable use
Policies governing connections to remote network
Polices outlining the sensitivity level of the various types of information held within an
organization
Policies protecting the privacy of the network’s user and any customer data
Policies defining security baselines to be met by devices before connecting them to the
network.
Creates a basis for legal action if necessary.
The key components of security policies:
• Statement of authority and scope: Define the name of security authority and areas cover
under that statement
• Identification and authentication policy
• Create Network access policy: How the user will use the company’s data infrastructure
• Remote access policy
• Incident handling policy: This topic specifies how the company will create an incident
response team and the procedure to be used during and after an incident
WWTC Active Directory Design
WWTC office at New York is largely autonomous and few IT personnel to take care of day-today IT support activities such as password resets troubleshoot virus problems. You are
concerned about sensitive data store in this location. You want to deploy a highly developed OU
structure to implement security policies uniformly through GPO automatically at all domains,
OU, and workstations.
At this location Windows Server 2016 is required providing the following AD features:
•
•
•
•
•
•
•
•
•
•
Use BitLocker encryption technology for devices (server and Work station) disc space and
volume.
Enables a BitLocker system on a wired network to automatically unlock the system volume
during boot (on capable Windows Server 2016 networks), reducing internal help desk call
volumes for lost PINs.
Create group policies settings to enforce that either Used Disk Space Only or Full Encryption is
used when BitLocker is enabled on a drive.
Enable BranchCache in Windows Server 2016 for substantial performance, manageability,
scalability, and availability improvements
Implement Cache Encryption to store encrypted data by default. This allows you to ensure data
security without using drive encryption technologies.
Implement Failover cluster services
Implement File classification infrastructure feature to provide automatic classification process.
IP Address Management (IPAM) is an entirely new feature in Windows Server 2016 that
provides highly customizable administrative and monitoring capabilities for the IP address
infrastructure on a corporate network.
Smart cards and their associated personal identification numbers (PINs) are an increasingly
popular, reliable, and cost-effective form of two-factor authentication. With the right controls in
place, a user must have the smart card and know the PIN to gain access to network resources.
Implement Windows Deployment Services to enables you to remotely deploy Windows
operating systems. You can use it to set up new computers by using a network-based
installation.
Deliverables
Deliverables
•
Create Active directory infrastructure to include recommended features
•
•
Create OU level for users and devices in their respective OU
Create Global, Universal, Local group.. Each global group will contain all users in the
corresponding department. Membership in the universal group is restrictive and
membership can be assigned on the basis of least privileged principle. (For design
purpose, you can assume that WTC as a Single Forest with multiple domains).
• Create appropriate GPO and GPO policies and determine where they will be applied.
Reference:
WWTC Organization Chart
VP OPR, VP NW USA, VP SW USA, VP NE USA, VP SE USA, VP M USA
Table:-1 Equipment Inventory
Subnet
Offices
VP OPR
VP OPR Office
CEO IT
CEO FIN
CEO HR
CEO IT’s Staff
CEO FIN’s Staff
CEO HR’s Staff
VP NW USA,
VP Office
Manager 1
Telephone
2
2
2
2
2
2
2
Devices
1
1
1
1
1
1
1
Comment
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
2
2
2
2
Work Stations
Work Stations
Manager 2
Broker 1
Broker 2
Broker 3
Broker 4
Staff
2
2
2
2
2
2
2
2
2
2
2
2
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
VP SW USA
VP SW Office
Manager 1
Manager 2
Broker 1
Broker 2
Broker 3
Broker 4
Staff
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
VP NE USA
VP NE Office
Manager 1
Manager 2
Broker 1
Broker 2
Broker 3
Broker 4
Staff
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
VP SE USA
VP SE Office
Manager 1
Manager 2
Broker 1
Broker 2
Broker 3
Broker 4
Staff
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
VP M USA
VP M Offices
Manager 1
Manager 2
Broker 1
Broker 2
Broker 3
Broker 4
Staff
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Work Stations
Printer
20
Server
40
At various offices.
Exact location to be
determined.
These does not
include DNS,
DHCP, Domain
Controller. Need to
be determined by
designer
Note: WWTC is opening an office only at New York location. Please
do not confuse Office holder’s title (VP NW USA) with the
location.
WLC and AP ordering Guide
Table 4. Ordering Information for Cisco Wireless LAN Controllers
Product
Features
Customer
Requirements
Part Number
Wireless LAN Controllers
Cisco 4400
Series Wireless
LAN
• Modular support of 12, 25,
50, or 100 Cisco Aironet
access points
• The Cisco 4402 with 2
• For midsize to
large
deployments
• High
• AIR-WLC440212-K9
• AIR-WLC440225-K9
Controller
Cisco 2100
Series Wireless
LAN
Controller
Cisco
Catalyst® 6500
Series /7600
Series Wireless
Services
Module
(WiSM)
Cisco Catalyst
3750G
Integrated
WLAN
Controller
Gigabit Ethernet ports
supports configurations for
12, 25, and 50 access points
• The Cisco 4404 with 4
Gigabit Ethernet ports
supports configurations for
100 access points
• IEEE 802.1D Spanning
Tree Protocol for higher
availability
• IPSec encryption
• Industrial-grade resistance
to electromagnetic
interferences (EMI)
availability
• AIR-WLC440250-K9
• AIR-WLC4404100-K9
See the Cisco
Wireless LAN
Controllers Data
Sheet for more
information.
• Supports up to 6, 12 or 25
Cisco Aironet access points
• Eight Ethernet ports, two of
which can provide power
directly to Cisco APs
• Desk mountable
• For retail,
enterprise
branch offices,
or SMB
deployments
• AIR-WLC2106K9
• AIR-WLC2112K9
• AIR-WLC2125K9
See the Cisco 2106
Wireless LAN
Controller Data
Sheet for more
information.
• Wireless LAN Controller
for Cisco Catalyst 6500 or
Cisco 7600 Series Router
• Supports 300 Cisco Aironet
access points
• IPSec encryption
• Industrial-grade resistance
to electromagnetic
interferences (EMI)
• Intrachassis and interchassis
failover
• Interoperable with Cisco
Catalyst 6500 Series Firewall
and IDS services modules
• Embedded
system for the
Cisco Catalyst
6500 Series and
Cisco 7600
Series Router
infrastructure
• For large-scale
deployments
• High
availability
• WS-SVC-WISM1-K9
• WS-SVC-WISM1-K9= (spare)
See the Cisco
Catalyst Wireless
Services Module
Data Sheet for
more information.
• Cisco Catalyst 3750G
Series Switch with wireless
LAN controller capabilities
• Modular support of 25 or 50
Cisco Aironet access points
per switch (and up to 200
access points per stack*)
• IPSec encryption
• Industrial-grade resistance
to electromagnetic
interferences (EMI)
• For midsize to
large
deployments
• High
availability
• WS-C3750G24WS-S25
• WS-C3750G24WS-S50
See the Cisco
Catalyst 3750G
Integrated
Wireless LAN
Controller Data
Sheet for more
information.
Cisco Wireless
LAN
Controller
Module for
Cisco
Integrated
Services
Routers
• Wireless LAN controller
integrated into Cisco
integrated services routers
• Supports 6, 8, 12, or 25
Cisco Aironet access points
• Embedded
system for Cisco
2800/3800
Series and Cisco
3700 Series
routers
• For retail,
small to
medium-sized
deployments or
branch offices
• NME-AIR-WLC6K9
• NME-AIR-WLC6K9= (spare)
• NME-AIR-WLC8K9
• NME-AIR-WLC8K9= (spare)
• NME-AIRWLC12-K9
• NME-AIRWLC12-K9=
(spare)
• NME-AIRWLC25-K9
• NME-AIRWLC25-K9=
(spare)
See the Cisco
WLAN Controller
Modules Data
Sheet for more
information.
Please refer to the Cisco Wireless LAN Controller Ordering Guide supplement to learn when to add the following
SKUs to track the deployment of voice and context-aware mobility applications.
Table 2. Cisco Aironet Indoor Rugged, Indoor, Wireless Mesh, and Outdoor Rugged Access Points
Product
Features
Customer
Requirements
Part Number
Indoor Rugged Access Points
Cisco
Aironet
1250
Series
• Industry’s first
business-class access
point based on the IEEE
802.11n draft 2.0
standard
• Provides reliable and
predictable WLAN
coverage to improve the
end-user experience for
both existing 802.11a/b/g
clients and new 802.11n
clients
• Offers combined data
rates of up to 600 Mbps
to meet the most rigorous
bandwidth requirements
• Designed for both office
and challenging RF
environments
• Especially beneficial for
environments with the
following characteristics:
• Challenging RF
environments (for
example, manufacturing
plants, warehouses,
clinical environments)
• Bandwidth-intensive
applications (for example,
digital imaging, file
transfers, network backup)
• Real-time, latencysensitive applications such
as voice and video
Access point
platform with preinstalled radio
modules:
• AIR-AP1252AGx-K9: 802.11a/g/ndraft 2.0 2.4/5-GHz
Modular
Autonomous Access
Point; 6 RP-TNC
• AIR-AP1252G-xK9: 802.11g/n-draft
2.0 2.4-GHz
Modular
Autonomous Access
Point; 3 RP-TNC
• AIR-LAP1252AG-
Cisco
Aironet
1240AG
Series
• Second-generation
802.11a/g dual-band
indoor rugged access
point
• 2.4-GHz and 5-GHz
antenna connectors for
greater range or coverage
versatility and more
flexible installation
options using the broad
selection of Cisco
antennas available
• Need to support existing
802.11a/b/g and new
802.11n wireless clients
x-K9: 802.11a/g/ndraft 2.0 2.4/5-GHz
Modular Unified
Access Point; 6 RPTNC
• AIR-LAP1252Gx-K9: 802.11g/ndraft 2.0 2.4-GHz
Modular Unified
Access Point; 3 RPTNC
See the Cisco
Aironet 1250
Series Ordering
Guide for more
information.
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