If you are someone who has been in the computer field for a long time, of course you are already familiar with several network devices on computers. The equipment in this computer also has an important role in distributing information. Apart from ensuring that all important information will not be lost when distributed, this tool also has a big role in supporting the data transformation process so that other components can operate properly.
Well, on this occasion, Kabar Games will discuss more deeply about the types, ways of working and functions of 20 computer network devices along with the understanding of each of these network components and equipment. Come on, just listen to it!
Router is a hardware (hardware) on a computer network that has a function to distribute or share IP addresses to all computers connected to the router in 2 ways, namely statically and DHCP (Dynamic Host Configuration Protocol).
The way a router works is to route packets or data information which is called routing. That way, the router will know clearly whether the direction of travel is on the same network or not. If the router is on the same network, the router will block outgoing packets and forward the packet by routing on the same network, and vice versa. If the router is on a different network, the router will forward it to that network.
NIC (Network Interface Cards) or network cards are referred to as media that can connect computers via a cable connection. NIC can work at the physical layer, which before distributed NIC will break the data into bits. After that the bits will be sent over the network to other computers which are then re-assembled into complete data. In fact, each NIC has its own unique code, which usually consists of a 12 digit code known as the MAC Address (Media Access Control).
Network equipment on the next computer that is very familiar to our ears is a cable. The cable is a conductor of current from a device. There are several types of cables that are commonly used, such as coaxial cables, UTP (unshielded twisted pair) cables, STP (shielded twisted pair) cables and fiber optic cables (optical fiber). The important part that needs to be considered when you want to use a cable is to prepare a sufficient location to place the cable, so that you will be more flexible in working.
A hardware device that can unite network cables from each workstation, server or other device is known as a constructor or hub. The function of the hub on a computer is to share the server with other networks.
Hub is in charge of copying a set of data packets from a source that has been connected to a port on the hub and will share it with all ports connected to the hub. To understand easily how a hub works, we can see from the analogy as follows.
There are 4 children in one class and only one of the four children has candy. In this case, the child who has the candy is the hub, and the three friends are the ports that will be distributed data packets. But the hub is not able to share data packets (analogous to candy) evenly across all ports (three of its friends), so this is a weakness of the hub itself.
A switch is a device that has the role of connecting many network segments with forwarding based on MAC addresses. Connecting a computer to a switch is exactly the same as connecting a computer or router to a hub. Switches can be used as a substitute for a hub that has been directly attached to the network.
Basically, the switch is able to operate like a bridge, the difference is in the number of ports. Swicth has several ports so it is often referred to as a multi-port bridge. Switches have the advantage of sharing the connection signal, which is able to make multiple computers get internet speed evenly.
In the world of computers, we know a hardware device called a bridge, where this component can share one network with another, in order to obtain an efficient network. The rapid development of the network makes us really need a bridge to help our work. In general, a bridge must first recognize the MAC address which usually transmits data to the network, then the bridge creates an automatic table.
Almost the same as a router, an access point can transmit a wireless signal that is emitted from the router to create a WLAN network. The access point is in charge of providing a connection between the electrical data path formed by an Ethernet cable and the RF signal data path formed by Wifi.
Hardware or hardware that is able to transmit changes to analog signal data which then becomes digital signal data back so that the computer can run is called a modem. Of the several types of computer network devices, we will be very familiar with this one device.
Especially when online classes are held like now, this tiny object must be in the hands of students, right? To make a computer connected to an internet network, a modem needs to get an analog signal first, then it is converted into a digital signal and finally delivered to the computer.
A repeater is a network device used to amplify data signals over long distances so that it becomes easier to access. Repeaters have two types of components that have their respective duties. The first component is in charge of receiving the signal data from the transmitter, while the second component is responsible for transmitting the signal data back. Before being transmitted again, the signal in the repeater will be accelerated first.
The connector is a device that is able to connect the cable to the Network Adapter. Each type of connector already has its own cable pair attached to the computer device. For example, an RJ-45 connector is paired with a UTP cable, a BNC / T connector with a coaxial cable, an ST connector with a fiber optic cable and so on.
In general, servers have the function of managing data traffic and storing data files for later sharing using file sharing. The server will start working when it has received orders from the client. The way it works is by serving data requests from clients and providing protection on client computers. There are 9 types of servers that you should know, including:
- Proxy server
Serves as a gateway that limits data requests and file sharing between servers and clients.
- Telnet server
Serves to manage the computer by logging in and logging out on the host computer.
- Virtual server
Serves to make a number of physical servers appear as if they were multiple servers.
- Web server
Serves to store content on the website.
- Audio and video servers
In charge of storing the multimedia features of a website.
- FTP server
In charge of managing data transfer in a network.
- Server application
Process orders from the client then connect to the database.
- Mail server
In charge of storing electronic mail and handling various client requests.
- News server
In charge of sending various news through the news network.
Client computers or User computers are users of server computer services on a computer network. Between the server computer and the client computer has a performance that is mutually interconnected. The client computer will contact the server to send the required data if any, so all these processes require a protocol. The protocol itself functions as a means of communication between two or more parties. This protocol will control client computers and server computers in sending or receiving data.
The next computer network is the proxy server. This device is known as a form of computer network service that allows clients to make network connections indirectly to other network services. In other words, a proxy server is a computer program that acts as another computer to make requests for content from an intranet or the internet.
In the midst of a situation that is prone to criminal acts like today, the use of CCTV or Closed Circuit Television is very much needed. Besides having the function of increasing security, it also has a fairly simple way of working. Simply record an image and send it to a computer monitor screen.
The existence of CCTV also allows you to monitor the items that you have even though you are not there. CCTV recordings can be stored on a hard drive or NVR which can be accessed via computers and smartphones.
USB WiFi Adapter
A USB WiFi Adapter can be used as an alternative to a Wifi Card on a computer with a problem, where the computer cannot connect to a wifi network. In use, we need to install the driver on the device, then after it is installed, just attach the wifi adapter to the computer’s usb port.
With the rise of crime in the digital world, a computer network security system has emerged which is used to protect computers from external computer attacks, known as a firewall. Firewalls work by monitoring all information traffic to allow incoming data, whether good data or bad data. When bad data is encountered, the firewall will block the data from entering the computer.
Multiplexer is a tool used to increase the effectiveness of using a communication channel that accepts several input channels from one channel to another. The multiplexer will receive so much incoming data, but it only allows (selected) one of the data to be passed / forwarded to be output within a certain time. This process is known as the selector line or input select.
Next, we will get acquainted with a network device that can provide a public IP address that can be accessed by private IP, this device is known as the Network Access Translator or commonly abbreviated as NAT. The way NAT works is very complex, namely by receiving data packets from a client that is addressed to a remote server on the internet, recording the client’s IP address, changing the original IP address to a NAT IP number, and forwarding the packet to the remote server. When the response from the remote server is received by NAT, NAT will change the destination address of the packet to the IP address of the client in question.
A wireless card or wifi card is a piece of hardware found in a laptop that will act as an electromagnetic signal receiver. The wireless card is in charge of detecting around the wifi network, whether there is an incoming network that can be connected via a laptop. Once there is an incoming network, we sign in so we can connect.
LAN cards are often known as NICs (Network Interface Cards), the way this device works is if there is continuity with other equipment on the computer, in the form of a DMA memory card. Then the LAN card will send data to a temporary storage area called memory when a parallel data stream enters the LAN card.
So, that was a brief explanation of the kinds of 20 computer network devices and how they work and what they mean. Hopefully this is useful. Stay tuned for the latest and updated news about games and anime only at Kabar Games.