NETWORK TYPE

PEER TO PEERCLIENT SERVER

DATA RATES

ADDRESSING IP MAC

NETWORK TYPE : PEER TO PEER

NETWORK TYPE : PEER TO PEER

• there are no dedicated servers (central computers that control the network) or hierarchy among the computers.

• computers on the network handle security and administration for themselves.

• users must make the decisions about who gets access to what. 

NETWORK TYPE : PEER TO PEER

Size• Peer-to-peer networks are

designed for connecting small numbers of computers. They tend to run into problems at around 5-10 computers or more.

NETWORK TYPE : PEER TO PEER

Security• Security on a peer-to-peer network is

not very powerful. So if you have security concerns go for something you can control (read server!) Since on a peer to peer network the users give access to folders, they can choose not to require passwords. This lack of consistency has a tremendous impact on the security of your network and you will need adequate training for your users to prevent problems.

NETWORK TYPE : PEER TO PEER

Growth• If your organisation is growing rapidly,

it will usually out grow a peer-to-peer network very quickly. While a peer-to-peer network may work fine for up to around ten computers, it almost certainly won't for twenty.

NETWORK TYPE : PEER TO PEER

Centralise your peer to peer network as much as possible

ISSUES TRAINING HOSTING RESOURCES

NETWORK TYPE : PEER TO PEER

Centralise your peer to peer network as much as possible

TrainingIn a peer-to-peer network, the users handle administration. This means that all the users need to be trained in how to share files, folders, and printers. In a peer-to-peer network, suddenly shutting down your computer can cause one of your colleagues to be unable to print or worse still corrupt your shared database if you have one…

NETWORK TYPE : PEER TO PEER

Centralise your peer to peer network as much as possible

Hosting ResourcesThe last concern is that each computer that attaches to another computer, whether for printing or for file sharing, takes up system resources on the hosting computer. If the drain becomes dramatic enough to slow down the host computer (which someone else is working on!) then perhaps it is time to start thinking about a dedicated server.

NETWORK TYPE : PEER TO PEER

Peer-to-ConclusionA peer-to-peer network is sometimes the perfect (and cheap) solution for connecting the computers at a small voluntary organisation. However, peer-to-peer networking has its limitations, and your organisation should tread with caution to avoid headaches (security issues, hardware inadequacies, backup problems, etc.) down the road.

NETWORK TYPE : CLIENT SERVER

• In an environment with more than around 5-10 computers, a peer to peer network begins to become more trouble than it is worth. Your computers start to slow down. You can never find the file you are looking for, and security is non-existent.

• it is probably time to switch to a client-server network by bringing in a dedicated server to handle the load. The server is "dedicated" because it is optimised to quickly serve requests from the clients (other computers on the network).

NETWORK TYPE : CLIENT SERVER

NETWORK TYPE : CLIENT SERVER

What is a server?A server is a computer that is running software that enables it to serve specific requests from client computers For example, you can have a file server that acts as a central storage place for your network, a print server that routes print requests and status information between computers and printers connected on the network, as well as a multitude of other servers and server functions. A server provides many benefits including:

OPTIMASATIONCENTRALISATIONSECURITYREDUNDANCY and BACK-UP

NETWORK TYPE : CLIENT SERVER

OptimisationServer hardware (the physical, touchable, material parts of a computer or other system) is designed to quickly serve requests from clients.

NETWORK TYPE : CLIENT SERVER

CentralisationFiles are in one location for easy administration.

NETWORK TYPE : CLIENT SERVER

SecurityMultiple levels of permissions - access privileges associated with a file or directory can prevent users from doing damage to files.

NETWORK TYPE : CLIENT SERVER

Redundancy and Back-upData can be stored in redundant ways (for example copied onto another hard disk on the server using special technology called RAID), or stored on external media such as tapes, so it can be restored quickly in case of problems. A server, like any computer, consists of two parts, the hardware and the software.

NETWORK TYPE : CLIENT SERVERServer Hardware

• Hot swappable drives to speed up adding or replacing hard disks (used in RAID) - drives can be changed without having to shut down the server.

• The ability to support multiple processors - the brains behind a computer. Processors are responsible for performing calculations and tasks that make computer programs work. Multiple processors can be an advantage if you need to run applications that are processor intensive such as a very large database.

• Support for larger amounts of RAM - the more memory you have the faster your network can run.

• Faster input and output - information can travel around the network more quickly.

• Fast network cards.

NETWORK TYPE : CLIENT SERVERServer Software

Server software comes in two categories, operating systems and applications:

OPERATING SYSTEMAPPLICATION

NETWORK TYPE : CLIENT SERVERServer Software : OPERATING

SOFTWARE• A network operating system is an

operating system which includes software to communicate with other computers via a network. 

• A Network Operating System has many features built-in. All include file serving, print serving, backup and some way to secure those resources. Some Network Operating Systems also include a web server (to allow you to host your website or intranet yourself) or an email server (for email distribution around your network), while others require you to buy these items separately.

NETWORK TYPE : CLIENT SERVERServer Software : APPLICATION

• Server applications can be designed for nearly every purpose imaginable, from fax servers to remote access servers. Every application will have specific server requirements, and will be typically designed to run on either Windows Server 2003 or Netware and increasingly Linux. Many servers run multiple applications (e.g. email and faxing) to serve a variety of needs.

DATA RATES

Data rate is a technical term that describes how quickly information can be exchanged between electronic devices. In many cases, this term is used to describe Internet connection speeds and how quickly a consumer can upload or download files. Hardware components like hard drives, memory, and video cards also deal with data rate.NIC WIFIIDESATA

DATA RATES

NIC

The DFE-528TX is a high-performance auto-sensing 10/100Mbps dual-speed adapter for the PCI bus. Installable in a PC equipped with PCI expansion slots, this card turns a desktop computer into a high-bandwidth graphic/multimedia workstation running at full-duplex speed.

DATA RATES

NIC

The Linksys WMP54G PCI is a wireless-G (draft 802.11g) connectivity for your desktop PC. Capable of incredible data rates up to 54Mbps in the 2.4GHz radio band and also interoperates with Wireless-B (802.11b) networks at 11Mbps. You put your PC wherever you want, with no cabling hassle.

DATA RATES

IDE

data transfers at the rate of up to 133Mb/sec

DATA RATES

SATA

data transfers at the rate of 150Mb/sec to 6Gbits/sec

ADDRESSING

IP (Internet Protocol) MAC (Media Access Control)