Twisted Pair
Advantages : 1. Cheaper and far easier to splice
2. Less susceptible to electrical interference caused by nearby equipment or wires.
3. In turn are less likely to cause interference themselves.
4. Because it is electrically "cleaner", STP wire can carry data at a faster speed.
Disadvantages : 1. STP wire is that it is physically larger and more expensive than twisted pair
wire.
2. STP is more difficult to connect to a terminating block.
Coaxial Pair
Advantages : 1. Coaxial cable can support greater cable lengths between network devices than twisted pair cable.
2. Thick coaxial cable has an extra protective plastic cover that help keep moisture
away.
Disadvantages : 1. Thick coaxial is that it does not bend easily and is difficult to install.
Fiber Optic
Advantages : 1. One single mode fiber can replace a metal of time larger and heavier.
2. Multi-mode optical cable has a larger diameter and can be used to carry signal
over short distance.
Disadvantages : 1. Fiber optic versus metal cable is that it is difficult to make connections to
fiber optic cable.
2. The optical fiber must be highly polished to allow light to pass with little loss.
Sunday, August 30, 2009
Saturday, August 29, 2009
MESH TOPOLOGY & TREE TOPOLOGY
MESH TOPOLOGY
A type of network setup where each of the computers and network devices are interconnected with one another, allowing for most transmission to be distributed even if one of the connections go down. This type of topology is not commonly used for most computer network as it is difficult and expensive to have redundant connection to every computer. However, this type of topology is commonly used for wireless network. Below is a visual example a simple computer setup on a network using a mesh topology.
TREE TOPOLOGY
Among all the network topologies we can derive that tree topology is a combination of the bus and the star topology. The tree like structure allows you to have many servers on the network and you can branch out the network in many ways. This is particularly helpful for colleges, universities, and school. So that each of the branches can identify the relevant system in their own network and yet connect to the big network in some way.
The tree structure suits best when the network is widely spread and vastly divided into many branches. Like any other topologies, the tree topology has its advantages and disadvantages. A tree network may not suit small networks and it may be a waste of cable to use it for small network. Tree topology has some limitations and the configuration should suit those limitations.
A type of network setup where each of the computers and network devices are interconnected with one another, allowing for most transmission to be distributed even if one of the connections go down. This type of topology is not commonly used for most computer network as it is difficult and expensive to have redundant connection to every computer. However, this type of topology is commonly used for wireless network. Below is a visual example a simple computer setup on a network using a mesh topology.
TREE TOPOLOGY
Among all the network topologies we can derive that tree topology is a combination of the bus and the star topology. The tree like structure allows you to have many servers on the network and you can branch out the network in many ways. This is particularly helpful for colleges, universities, and school. So that each of the branches can identify the relevant system in their own network and yet connect to the big network in some way.
The tree structure suits best when the network is widely spread and vastly divided into many branches. Like any other topologies, the tree topology has its advantages and disadvantages. A tree network may not suit small networks and it may be a waste of cable to use it for small network. Tree topology has some limitations and the configuration should suit those limitations.
Sunday, August 16, 2009
E-COMMERCE
BUSINESS TO BUSINESS
B2B is major portion of E-COMMERCE activities. However, many third party exchanges suffer in making their business succesfull, although the corporations are increasing the adoption of B2B for e-procurement. B2B standars and ebXML are not widely accepted in the real world as we have anticipated.
BUSINESS TO CONSUMER
B2C involves what is known as electronic retailing or e-tailing. E-tailing involves online retail sales. E-tailing makes it easier for a manufacturer to sell directly to a consumer, cutting out the need for an intermediary (retailer). With B2C transactions there is no need for retailers or therefore, no need for a physical store from which to distribute product.
CONSUMER TO CONSUMER
C2C exchange involve all transaction between or among consumers. These transactions can also include third party involvement, usually in the form of those who facilitate the marketplace such as EBay.com.
In C2C network, consumer sell goods and service to another consumers. C2C has given online shopping and trading a new dimension.
B2B is major portion of E-COMMERCE activities. However, many third party exchanges suffer in making their business succesfull, although the corporations are increasing the adoption of B2B for e-procurement. B2B standars and ebXML are not widely accepted in the real world as we have anticipated.
BUSINESS TO CONSUMER
B2C involves what is known as electronic retailing or e-tailing. E-tailing involves online retail sales. E-tailing makes it easier for a manufacturer to sell directly to a consumer, cutting out the need for an intermediary (retailer). With B2C transactions there is no need for retailers or therefore, no need for a physical store from which to distribute product.
CONSUMER TO CONSUMER
C2C exchange involve all transaction between or among consumers. These transactions can also include third party involvement, usually in the form of those who facilitate the marketplace such as EBay.com.
In C2C network, consumer sell goods and service to another consumers. C2C has given online shopping and trading a new dimension.
Sunday, August 9, 2009
MyEG Portal and Rilek Portal
MyEG PORTAL
MyEG service berhad is concessionaire for the Malaysian E-Goverment MSC Flagship Application. Our role is a service Provider for the E-Services component essentially provides the electronic link between the Goverment and citizens/business.
Through our portal, we offer the Malaysian public a single point of contact between the Goverment and the people it serves. This portal enables Malaysians todynamically interact with numerous agencies within the Federal, State, and the Local Goverment machinery providing services ranging from information searches to license applications.
The cater the services which require physical presence/interaction, MyEG has set up E-Service Centre located throughout the country to complement our online presence. We believe that through this dual approach , we can enhance the relationship and quality of interaction between the Goverment of Malaysia and it's citizens.
RILEK PORTAL
RILEK offers JPJ Driving License service, summons payments and inquiries on Kejara points.
RILEK represent realibiality , simplicity and security. RILEK is eqquiped with high-end multimedia facilities and system support to accomodate heavy traffic low. In addition, it is capable of processing information at an efficientand high-speed rate. RILEK promotes a hasslefree and innovative lifestyle that is designed to eliminate queues and frustrations. RILEK combine advanced technology and human proficiency to enhance your lifestyle. RILEK provide easy transactions electronically via various delivery channels.
MyEG service berhad is concessionaire for the Malaysian E-Goverment MSC Flagship Application. Our role is a service Provider for the E-Services component essentially provides the electronic link between the Goverment and citizens/business.
Through our portal, we offer the Malaysian public a single point of contact between the Goverment and the people it serves. This portal enables Malaysians todynamically interact with numerous agencies within the Federal, State, and the Local Goverment machinery providing services ranging from information searches to license applications.
The cater the services which require physical presence/interaction, MyEG has set up E-Service Centre located throughout the country to complement our online presence. We believe that through this dual approach , we can enhance the relationship and quality of interaction between the Goverment of Malaysia and it's citizens.
RILEK PORTAL
RILEK offers JPJ Driving License service, summons payments and inquiries on Kejara points.
RILEK represent realibiality , simplicity and security. RILEK is eqquiped with high-end multimedia facilities and system support to accomodate heavy traffic low. In addition, it is capable of processing information at an efficientand high-speed rate. RILEK promotes a hasslefree and innovative lifestyle that is designed to eliminate queues and frustrations. RILEK combine advanced technology and human proficiency to enhance your lifestyle. RILEK provide easy transactions electronically via various delivery channels.
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