Components of a network
Revision
Internet
Components
NIC - Network Interface Card - This is both an electrical interface to the router/modem, and a logical board that communicates to the rest of the pc, usually registered jack forty five or registered jack eleven standard. The cable to provide a carrier for the signals is either shielded or unshielded
Hub - this splits the connection between multiple PC’s, which may regenerate the signal.
Switch - used to split multiple PCs into different groupings based on logical needs or security needs.
Router - used to send data between physical networks.
Ethernet CableEthernet cables connect network devices such as modems, routers, and adapters. They transmit data using the Ethernet protocol. | HubA hub is used in a wired network to connect Ethernet cables from a number of devices together. The hub allows each device to talk to the others. | Server and clientA network server is a computer designed to process requests and deliver data to other (client) computers over a local network or the Internet. |
Ethernet Cable
Ethernet cables connect network devices such as modems, routers, and adapters. They transmit data using the Ethernet protocol.
Hub
A hub is used in a wired network to connect Ethernet cables from a number of devices together. The hub allows each device to talk to the others.
A ring network
Pros
1. Very orderly network where every device has access to the token and the opportunity to transmit.
2. Performs better than a star topology under heavy network load. Can create much larger network using Token Ring.
Cons
1. One malfunctioning workstation or bad port in the MAU can create problems for the entire network
2. Moves, adds and changes of devices can affect the network
A bus network
Pros –
1. Easy to implement and extend
2.Requires less cable length than a star topology
Cons –
1. Limited cable length and number of stations.
2. If there is a problem with the cable, the entire network goes down. Maintenance costs may be higher in the long run.
3.Outdated!!!!!!!!!!!!!!!!!!!!!!
A star network
Pros
1. Performance: Data packets do not travel through any unnecessary nodes. Communication between any two devices on the network involves at most three devices and two links. The isolation of traffic between nodes means that heavy utilization from one device is invisible to other devices on the network, provided that the central hub retains adequate capacity.
2. Isolation: Each device is isolated on its own link. This makes it easy to isolate individual devices from the network by disconnecting them from the hub. Any non-centralized failure will have very little effect on the network.
Cons –
The primary disadvantage of a star topology is the high dependence of the system on the functioning of the central hub. While the failure of an individual link only results in the isolation of a single node, the failure of the central hub renders the network inoperable, immediately isolating all nodes.
