CHAPTER 1 F5221 DONE..~

ok,

entries below are about designing a good network. ~

it starts with steps to design network, then followed by hierarchical network design, requirements that affect weather portion of network or affects entire of network. last entry is about server farm. there is a big part that must be "master" in chapter 1. also including in chapter 1 are, DMZ, Firewall, Redundancy. all are about designing a network which is need to have availability, security, scalability and manageability.. ~

so has, u need to ensure that your brain can absorb all of this. and make sure u will remind it back before u sleep.. chaiyok2..;p

chapter 1 is already done. tomorrow we will continue with chapter 2.

interesting PPDIOO..;p

heeee .. ~

SERVER FARM

Managing and securing numerous distributed servers at various locations within a business network is difficult. so, we used ---> centralizes servers in server farms. Server farms typically located in computer rooms and data centers.

benefits:

• Network traffic enters and leaves the server farm at a defined point. This arrangement makes it easier to secure, filter, and prioritize traffic.

• Redundant, high-capacity links can be installed to the servers as well as between the server farm network and the main LAN. This configuration is more cost-effective than attempting to provide a similar level of connectivity to servers distributed throughout the network.

• Load balancing and failover can be provided between servers and between networking devices.

• The number of high-capacity switches and security devices is reduced, helping to lower the cost of providing services.

requirements affects... ~

click to make it showed larger. i don't know how to show it originally large..hhehe;p

HIERARCHICAL DESIGN

Goals of the Core Layer

The Core Layer design enables the efficient, high-speed transfer of data between one section of the network and another. The primary design goals at the Core Layer are to:

.... Provide 100% uptime...(availability)
.... Maximize throughput... (availability also)
.... Facilitate network growth...(scalability)


Core Layer Technologies

• Routers or multilayer switches that combine routing and switching in the same device
• Redundancy and load balancing
• High-speed and aggregate links
• Routing protocols that scale well and converge quickly, such as Enhanced Interior Gateway Routing Protocol (EIGRP) and Open Shortest Path First (OSPF) protocol

Distribution Layer Routing

The Distribution Layer represents a routing boundary between the Access Layer and the Core Layer. It also serves as a connection point between remote sites and the Core Layer.

The Access Layer is commonly built using Layer 2 switching technology. The Distribution Layer is built using Layer 3 devices. Routers or multilayer switches, located at the Distribution Layer, provide many functions that are critical for meeting the goals of the network design.

These goals include:

• Filtering and managing traffic flows
• Enforcing access control policies
• Summarizing routes before advertising the routes to the Core
• Isolating the Core from Access Layer failures or disruptions
• Routing between Access Layer VLANs

- Distribution Layer devices are also used to manage queues and prioritize traffic before transmission through the campus core.

Access Layer Management

Improving the manageability of the Access Layer is a major concern for the network designer. Access Layer management is crucial due to:

The increase in the number and types of devices connecting at the Access Layer

The introduction of wireless access points into the LAN

Designing for Manageability

In addition to providing basic connectivity at the Access Layer, the designer needs to consider:

• Naming structures
• VLAN architecture
• Traffic patterns
• Prioritization strategies

step to design a network and basic network requirements. ~

step required to design a good network.

• verify the technical needs.
• determine the features and function required to meet need identified above.
• perform a network readiness assessment.
• create a solution and site acceptance assessment.
• create a project plan.

basic network requirements

1. scalability

- to ensure that the network are able to growth or upgrade. mean that, if customer need to expand their network or business, the network that are applied before can be upgraded and expands.

2. availability

- network must be up 24 hours a day, 7 days a week. failure of a single link shouldn't impact the network performance. ~

3. security

- a good network design must be implemented with security such as firewall, IDS, IPS lagii apa ea..? emm. antivirus and so on..;p

4. manageability

- network that are complex will not work efficiently and effective. a staff management must be required to manage network.