Hi Everybody
...Already discussed in the topcs :
www.sadikhov.com/forum/index.php?showtopic=18204
But I disagree with everybody and would like to launch again the discussion.
QUESTION NO: 195
Scenario:
TestKnight.com is a manufacturer and importer of fasteners, including and bolts. The main campus is composed of three buildings that are less than 200 meters apart. All TestKnight campus wiring is category 5e copper. Network access and distribution devices are currently 100 Mbps hubs, and the core is a 100 Mbps Layer-2 switch.
Development of the network has taken place over the past ten years in a series of steps that involved minimal planning, with the exception of the WAN links, which have been recently redesigned. The current network is characterized by slow response and frequent outages. The TestKnight.com engineering department uses a database server located in the engineering building. This server processes heavy local traffic that keeps the local network at 70% of bandwidth. Accounting uses commercial packages for general ledger, account payable, and account receivable; these packages are located on a server in the administration building. This server processes heavy local traffic and light traffic from other buildings. All other servers in the TestKnight information-processing center.
All TestKnight.com employees use e-mail located on one server in the TestKnight information processing center. There is a web server that is available for public use and an internal web server that is available to TestKnight employees for company news items and for human resources applications, such as an internal jobs-available database. The external web server is in a new TestKnight.com Corporate Internet
Module.
The Internal network traffic is expected to grow at 10% per year for the next five years. The IT Manager, Test Knight, has asked you to design an up-to-date, high-performance, scalable, secure, manageable, and reliable campus network to meet the strategic goals of TestKnight.com. However, finances are limited, so the design needs to meet requirements at minimum cost.
Which three modules of the Enterprise Network model will you include in your design?
a) campus core module
b ) edge distribution module
c) management module
d) corporate interner module
e) server farm module
f) building distribution module
AT & TK Answer: A, C, E
My answers : A E F
My explanations:
a) Everybody is agree to upgrade the physical layer from copper wires to multimode fiber. The core does need to be upgraded from 100MB/s switching to 1 Gb/s switching, even if it's just a gigabit card to insert in the Core chassis, that's an upgrade and needs to be part of your design. The core upgrade is especially necessary if we place the server farm in a central location as lot of traffic will cross the core links : the migration from the rule 80/20 to 20/80 is the tendancy of modern networks.
b ) There are no details in the scenario about the edge distribution performances but the WAN module is recent; I would imagine what ever is the current edge distribution module it would be enough for WAN links speed and Internet access requirements, compared to the critical performance issues exparienced on the LAN.
c) No management information is present in the scenario except that the company is able to provide bandwidth usage datas, so should we suppose that a management station already exists ? Even if it doesn't exists, isn't it less important than the critical performances issues experienced on the LAN ?
d) The external web server is in a new TestKnight.com Corporate Internet
Module. "New" means that this module is already updated and doesn't need to be included in your updating design.
e) The server farm need to be deployed to offer centralised, scalable, manageable servers. Although most of the engineering traffic will cross the backbone, this enters in the 20/80 rule.
f) 100 MB/s Hubs : to reduce the collision domain, increase the performances, the Duilding distribution layer needs to be upgraded to L2 witching. There are no details about the attachment of the actual servers to the LAN but these are probably connected to the 100MB/s HUBS on the building distribution module. Wherever we place the servers (in all buildings or IT building), this module will need to be upgraded.
Conclusion : A E F
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Because the upgrade is here to answer to the problem : "THe current network is characterised by slow response and frequent outages"
So although I will concentrate on performance and reliability instead of the other point (secure, manageable)
What do you think ?
