Miscellaneous network topology and understanding ..

a). Or Linear Bus Topology In this topology each computer will be connected to a long cable with a terminal, and at the end of the Kable must end with a terminator This topology uses coaxial cable to use with T-Connector 50 ohm terminator at the end of the network.b) Ring Topology is a network topology in which all computers are connected to make a circle. With a sense every computer that is connected into a network of inter-connected to two other computers to form a network similar to the shape of a ring.c) Topology Star topology each node is the node center / central as a counselor. Data flow will go towards the new center node to node tujuan.topologi we already use another tool to help connect computer networks. For example hubs, switches, etc.1. Infrastructure topology. The most prominent thing in this topology is a hardware access point as a connecting medium. So the client must be a member of this network through the access point before you can relate to other clients2. Ad hoc.Topologi topology is one kind of peer to peer networks. It means that the network is built just rely komponenWireless Card Adapter.Dynamic Routing using In a network where there is more than one routing path for achieving the same goalNAT is a method to connect more than one computer to the Internet using a single IP addressWeb Server is a server software that functions accept HTTP or HTTPS requests from clients, known as a web browser and sends the results back in the form of web pages are generally in the form of HTML documentsMail server is an important device in the making webmail as the place of the mail database in the network to perform resource sharing, and can be used to facilitate the Company in the manufacture of webmail
 PROXY SERVER is a server computer or a computer program that can act as the other computers to make requests to the content of the Internet or intranet.DHCP is a service that automatically assigns IP addresses to computers that request. computer that provides IP number is called as a DHCP server

The operating system is responsible for activities related to the management of processes such as:

• Create and delete user processes and system processes. Charge of operating systems allocate resources needed by a process and then take it back resources after the process is completed so that it can be used for other processes.• Suspend or resume the process. The operating system will manage the process of what should be implemented in advance based on a priority basis from existing processes. What happens when two or more processes are waiting in line to be executed, the operating system will prioritize processes that have the greatest priority.• Provide a mechanism for process synchronization. The operating system will set the course of several processes that are executed concurrently. The goal is to avoid inconsistencies in data for accessing the same data, also to regulate the course of the order process so that each process runs smoothly• Providing mechanisms for process communication. The operating system provides a mechanism so that multiple processes can interact and communicate with each other (eg, sharing resources between processes) one another without causing disruption of other processes.• Providing mechanisms for deadlock handling. Deadlock is a situation where such a system each process has stalled because the resources can not be shared and waiting for resources that are owned by another process. Waiting for each other is called deadlock (deadlock). The operating system should be able to prevent, avoid, and detected a deadlock. If a deadlock occurs, the operating system must also be able to restore the system's state.
Minimum specifications remedy Windows 98:
1. Cpu 486DX 66 megahertz (MHz) or more2. 16mb ram or more3.hardisk 225 (Fat 16) or 175 (Fat 32).4.Resolusi minimal VGA monitor or better5. 3.5 inch FD6.CD room
Operating system is the software that controls the execution of computer programs, namely by adjusting the processing time, error checking, controlling input and output, perform calculations, compilation, storage, data processing and various forms of related services. Operating system is resources manager (resource manager) which serves to organize, organize, mengopersaikan overall parts of complex systems.Atu steps by booting DOS diskette;1. The first, restart the computer my friends2. After that, when the computer is booting press and hold DELETE (DEL), this will bring my friends to the SET UP menu BIOS C-MOS.3. Upon entry into the menu. Then the next step select ADVANCE BIOS.4. On FIRST boot the system, replace the Floppy Disk.5. Okay already ... we proceed to the next step. Then save and exit the BIOS Set Up do not forget to click Save and Exit.6. Then enter DOS diskette containing or Start Up into the floppy disk.7. Then do the boot again from the beginning.

here is no difference between scheduling short term, medium term and long term.Short term scheduler• Short term scheduler is used to choose among the ready processes in execution and one of them is allocated to the CPU.• Short term scheduler is often used to select a new process for the CPU. The process is executed only a few milliseconds before waiting for I / O.• Due to the short duration between executions, Short term scheduler must be very fastExample: if Short term scheduler takes 10ms to 100ms decide to execute the process, then 10/110 = 9% CPU is used to schedule jobs.• At the time sharing system, each new process is placed in memory. Short term scheduler is used to select from these processes in memory for diekseskusi.Medium term scheduler• Some OS are like sharing system, requires scheduling additional level (intermediate), the so-called "medium term scheduler".• Introduce the concept of swapping process: the process in "swap out" and in the "swap in" the medium term scheduler.• Swapping is necessary to improve the "process mix" or because of changes in the memory requirement exceeds the available memory, the memory needs to be freed.Long term scheduler• Processes the batch system on the spool to the mass storage device (disk), stored as subsequent execution.• Long term scheduler is used to select the process from the pool and save it to memory.• Long term scheduler is often not execute, used only if the process of leaving the system.• Because the interval between executions happened a long, Long term scheduler has more time to decide which processes are selected for execution.• Long term scheduler choose well "process mix" between I / O bound and CPU bound.- When all processes are I / O bound, ready queue is almost always empty.- When all processes are CPU bound, I / O queue is almost always empty.• In some systems, Long term scheduler is not used (eg in time-sharing system) or minimal...

okey thank you hopefully this article useful for you all ... ^ _ ^