Assignment 3 (SAD2)

Interview your university network specialist. Ask how various parts of the system communicate with each other throughout the university. (Q) Given the chance to redesign the existing setup, enumerate and discuss your key points for an effective and efficient network environment ideal for the university.
(At least 3000 words)

In this assignment we are task to interview a network analysis in our university. Engr. Ariel Roy Reyes is the assigned network analysis in the university. Supposed to be last week we have an interview schedule with Sir Reyes but unfortunately he could not make it because of some important matter. He wants to have a group or class discussion in order to share his answers to everyone. Good to say that this week he allows us to pass a questionnaire for him to answer via email. Now, I will discuss the questions with the corresponding answers from Sir Reyes.
The first question was all about the components involved in the system/s in the university including the hardware, software, technology they are using, and etc. According to Sir Reyes, he is not the right position to discuss the details of the software components used as there are other assigned personnel for such job. However, talking about hardware component and technology used, basically I, assigned as the network administrator, am entrusted to maintain our different servers to run 24/7. Currently, we have our Web Server hosted here in our University in our HP ProLiant ML350 Server. It’s an old but stable server set-up here in our Networks Office and has been active since Engr. Val A. Quimno , not yet a dean, was appointed as the Network Administrator.
The said server has the following specification:
• Intel Xeon 3.0 GHz, 3.2 GHz, or 3.4 GHz processors (dual processor capability) with 1MB level 2 cache standard. Processors include support for Hyper-Threading and Extended Memory 64 Technology (EM64T)
• Intel® E7520 chipset
• 800-MHz Front Side Bus
• Integrated Dual Channel Ultra320 SCSI Adapter
• Smart Array 641 Controller (standard in Array Models only)
• NC7761 PCI Gigabit NIC (embedded)
• Up to 1 GB of PC2700 DDR SDRAM with Advanced ECC capabilities (Expandable to 8 GB)
• Six expansion slots: one 64-bit/133-MHz PCI-X, two 64-bit/100-MHz PCI-X, one 64-bit/66-MHz PCI-X, one x4 PCI-Express, and one x8 PCI-Express
• New HP Power Regulator for ProLiant delivering server level, policy based power management with industry leading energy efficiency and savings on system power and cooling costs
• Three USB ports: 1 front, 1 internal, 1 rear
• Support for Ultra320 SCSI hard drives (six hot plug or four non-hot plug drives supported standard, model dependent)
• Internalstorage capacity of up to 1.8TB; 2.4TB with optional 2-bay hot plug SCSI drive
• 725W Hot-Plug Power Supply (standard, most models); optional 725W Hot-Pluggable Redundant Power Supply (1+1) available. Non hot plug SCSI models include a 460W non-hot plug power supply.
• Tool-free chassis entry and component access
• Support for ROM based setup utility (RBSU) and redundant ROM
• Systems Insight Manager, SmartStart, and Automatic Server Recovery 2 (ASR-2) included
• Protected by HP Services and a worldwide network of resellers and service providers. Three-year Next Business Day, on-site limited global warranty. Certain restrictions and exclusions apply. Pre-Failure Notification on processors, memory, and SCSI hard drives.
Aside from it, our mail server running under Compaq Proliant ML330 Server, our oldest server, is also hosted here in our Networks Office. Together with other Servers, such as Proxy and Enrollment Servers, both proxy and our enrollment servers are running in microcomputer/personal computers but with higher specifications to act as servers.
Next question was how the system or how do these communicate with one another, (topology, network connectivity, protocols, etc.)? According to Sir Reyes, all Servers are connected in a shared medium grouped as one subnetwork. In general, our network follows the extended star topology which is connected to a DUAL WAN Router that serves as the load balance between our two Internet Service Providers. All other workstations are grouped into different subnetworks as in star topology branching out from our servers subnetwork as in extended star topology. At present, we are making use of class C IP Address for private IP address assignments. Other workstations IP assignments are configured statically (example: laboratories) while others are Dynamic (example: offices). All workstations are connected via our proxy servers that do some basic filtering/firewall to control user’s access to the internet aside from router filtering/firewall management. So, whenever any workstation has to connect to the internet, it has to pass through software and hardware based firewall.

Next question was all about the processes involved in the communication (each system to other systems). According to Sir Reyes, as mentioned above, in item 3, all workstations are connected via a proxy server. It means that whenever a workstation is turned on, it requests for an IP address from the proxy server (for dynamically configured IP address) and connect to the network after IP address is acquired. As connection is established, each system can now communicate and share resources within the same subnetwork and to server following the concepts discuss in your Computer Network Class.

Next question was how do you go along with the maintenance of the system? According to Sir Reyes, Basically, our servers are expected to be in good condition since it is required to be up 24/7. Daily, during my vacant period, monitoring on the servers are observed that includes checking logs, checking hardware performance such as CPU health, etc. If problems are observed, remedies are then and then applied. Once in a week, regular overall checkup is observed as preventive maintenance to ensure not to experience longer downtime if possible.

Next question was the system follow a specific standard? According to Sir Reyes, as I was appointed as the Network Administrator, everything was already in place except for some minor changes. Basically, different networking standards was already observed such as cabling standards, TIA/EIA 568A-B, different IEEE standards as discussed in your Computer Networks Subject, etc.

Next question was how is the security of the system? Are there any vulnerability, risks, corresponding mitigation techniques and access control? According to Sir Reyes, as I have mentioned, we have implemented both software and hardware based filtering/firewall. Basically, Risks or vulnerabilities and different mitigation techniques were considered to increase security in our network. Aside from filtering/firewall, constant monitoring on networks activity also increases the security of the system.

And the last questions are there any interference? During what (most) times do these occur? Explain their effects especially with regards to the business of the university? According to Sir Reyes, major Interferences are normally encountered as an effect of unforeseen and beyond our control events such as black outs, and the like. The said interference would of course affect University’s day-to-day businesses for obviously this will paralyze all our activities that rely on electricity and further this might cause damage on our network devices, etc. that may later be the reason for longer downtime. Problems encountered by our providers such as connection to the National/International Gateway also affect University’s business such as correlating to University’s Business Partners outside and within the country.

Given the chance to redesign the existing setup, enumerate and discuss your key points for an effective and efficient network environment ideal for the university.

For me, if I will given a chance to redesign the existing setup of the network environment in our university I would probably improved or enhance it instead of redesigning it because in redesigning a network environment it takes time, money, and other factors which are possibly cause of failures or delays. As what Sir Reyes said he rather has some improvement and maintenance instead of redesigning another one setup of network environment. And as I observed the existing setup in network environment in the university are providing the needs of the university.