CIS Network Analysis and Design Introduction & Overview Chapter 1 - Analyzing Business Goals and Constraints

Student Introductions Name Company or Government Service Job Title/Description Networking Experience Seeking Certification Course Expectations

Using Top-Down Network Design Methodology – Good network design must recognize that a customer's requirements embody many business and technical goals, including availability scalability affordability security manageability service level

Using Top-Down Network Design Methodology (cont’d) Quick response bottom up connect the dots approach can be used if goals and applications are well known Top-down approach performs requirements analysis before technology selection to prevent not capturing the customer’s most important needs Begins at the upper layers of the OSI reference model before moving to lover layers. Focuses on applications, sessions and data transport before the selection of routers, switches, and media that operates at the lower layers.

Using Top-Down Network Design Methodology (cont’d) Explores divisional and group structures Iterative. Recognizes that the logical and the physical design may change as more information is gathered Get the big picture first and then spiral downward into detailed technical requirements and specifications

Analyzing Business Goals Understand your customer’s business goals and constraints is critical to designing a network that meets customer’s objectives and approval. – Working with your client- research business, what industry, suppliers, market, products, services, and competitive advantages –Criteria for success - goals to meet, how success is defined –Consequences of failure - project fails, does not perform to specifications, how visible to upper- management, unforeseen behavior disrupt business operations

Changes in Enterprise Networks Undergoing major changes - making vast amounts of corporate data available to employees, customers, and business partners. Have become mission critical. Budgets have been reduced, greater worker productivity, use fewer people, decrease recurring WAN costs Telecommunications/networking have merged

Changes in Enterprise Networks (Cont’d) Today web surfing is common, increased outsourcing, alliances, partnerships, and virtual corporations. Global network-business model Virtual Private Networking (VPN) is growing Improve corporate communication, CAD?CAM to improve productivity, shorten development cycles Provide Better customer service

Typical Network Design Business Goals Increase revenue and profit Improve corporate communications Shorten product-development cycles Build partnerships Expand into worldwide markets Move to a global-network business model Modernize out-dated technologies

Identifying the Scope of a Network Design Project New network or a modification, single, set of LANs, a set of WAN or remote-access or the whole enterprise network. USE OSI to specify the types of functionality of new network design. Define scope in terms of segment, LAN, Building network, Campus network, remote access, WAN or enterprise network

Identify a customer’s network applications After determining business goals and scope now time to focus on real reason networks exist: Use a chart of network applications such as Table 1-1 and identify their criticality as extremely, somewhat and not critical

Analyzing Business Constraints Analyze business constraints Politics and Policies - office politics, personnel issues (advocates/opponents), job loss, client's business style, policies regarding protocols, standards, vendors, policies regarding distributed authority for network design and implementation Budgetary and Staffing constraints Scheduling

Business Goals Checklist Use a checklist similar to the one on page 17