Rangkaian Komputer
HUBA network hub is an unsophisticated device in comparison with, for example, a switch . A hub does not examine or manage any of the traffic that comes through it: any packet entering any port is rebroadcast on all other ports. Effectively, it is barely aware of frames or packets and mostly operates on raw bits. Consequently, packet collisions are more frequent in networks connected using hubs than in networks connected using more sophisticated devices.
ROUTER
A hardware device designed to take incoming packets, analyzing the packets and then directing them to the appropriate locations, moving the packets to another network, converting the packets to be moved across a different network interface, dropping the packets, or performing any other number of other actions. In the picture to the right, is a Linksys BEFSR11 router and is what most home routers look like.
A router has a lot more capabilities than other network devices such as a hub or aswitch that are only able to perform basic network functions. For example, a hub is often used to transfer data between computers or network devices, but does not analyze or do anything with the data it is transferring. Routers however can analyze the data being sent over a network, change how it is packaged and send it to another network or over a different network. For example, routers are commonly used in home networks to share a single Internet connection with multiple computers.
NETWORK CARD
A network card is a piece of hardware that allows a computer to connect to a computer network. Sometimes the network card is integrated on the motherboard. Each network card has a unique number; this is used for addressing. It is called the MAC address. MAC addresses can be used to obtain an IP address (in those network cards that use IP).
CONNECTOR
MODEM
Short
for MODulator/DEModulator, the first Modem was first released by
AT&T in 1960 when it introduced its dataphone. The Modem is a
hardware device that enables a computer to send and receive information
over telephone lines. The Modem is responsible for converting the
digital data used by your computer into an analog signal used on phone
lines and then converting it back once received on the other end. In
the picture to the right, is a UsRobotics 56k external Faxmodem, an
example of what an external dial-up Modem looks like.
Modems
are referred to as an asynchronous device, meaning that the device
transmits data in an intermittent stream of small packets. Once
received, the receiving system then takes the data in the packets and
reassembles it into a form the computer can use.
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