WHAT ARE THE DIFFERENT NETWORKING DEVICES?

Hub

A common connection point for devices in a network. Hubs are devices commonly used to connect segments of a LAN. The hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.

Switch

A hardware device that channels incoming data from multiple input ports to a specific output port that will take it toward its intended destination. It is a small device that transfers data packets between multiple network devices such as computers, routers, servers or other switches.

Router

A hardware device designed to receive, analyze and move incoming packets to another network. It may also be used to convert the packets to another network interface, drop them, and perform other actions relating to a network. The picture shows the Linksys BEFSR11 wireless router and is what many home routers resemble.

Bridge

A type of computer network device that provides interconnection with other bridge networks that use the same protocol. Bridge devices work at the data link layer of the Open System Interconnect (OSI) model, connecting two different networks together and providing communication between them.

Networking Interface Card

A computer hardware component that connects a computer to a computer network. Early network interface controllers were commonly implemented on expansion cards that plugged into a computer bus.

 

Modem

A device which converts the computer-generated digital signals of a computer into analog signals to enable their travelling via phone lines. The 'modulator-demodulator' or modem can be used as a dial up for LAN or to connect to an ISP.

 

Transceivers

A group of transceivers comprising both a transmitter and a receiver which are combined and share common circuitry or a single housing. When no circuitry is common between transmit and receive functions, the device is a transmitter-receiver. The term originated in the early 1920s.

Firewall

A network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted internal network and entrusted external network, such as the Internet. 

WHAT IS A NETWORK TOPOLOGY?

Network Topology refers to layout of a network. How different nodes in a network are connected to each other and how they communicate is determined by the network's topology. Network Topology refers to the layout of a network and how different nodes in a network are connected to each other and how they communicate.

TYPES OF NETWORK TOPOLOGY

1. Bus Topology

In networking a bus is the central cable -- the main wire -- that connects all devices on a local-area network (LAN). It is also called the backbone. This is often used to describe the main network connections composing the Internet.  Bus networks are relatively inexpensive and easy to install for small networks. 

Main Advantage:  It's easy to connect a computer or device and typically it requires less cable than a star topology.

Main Disadvantage: The entire network shuts down if there is a break in the main wire and it can be difficult to identify the problem if the network shuts down.

2. Star Topology

In a star network devices are connected to a central computer, called a hub. Nodes communicate across the network by passing data through the hub.

Main Advantage: In a star network, one malfunctioning node doesn't affect the rest of the network.
Main Disadvantage: If the central computer fails, the entire network becomes unusable.

 3. Ring Topology

A local-area network (LAN) whose topology is a ring. That is, all of the nodes are connected in a closed loop. Messages travel around the ring, with each node reading those messages addressed to it. 

Main Advantage: One main advantage to a ring network is that it can span larger distances than other types of networks, such as bus networks, because each node regenerates messages as they pass through it.

4. Mesh Topology

In a mesh network, devices are connected with many redundant interconnections between network nodes. In a true mesh topology every node has a connection to every other node in the network. There are two types of mesh topologies:

Full mesh topology: occurs when every node has a circuit connecting it to every other node in a network. Full mesh is very expensive to implement but yields the greatest amount of redundancy, so in the event that one of those nodes fails, network traffic can be directed to any of the other nodes. Full mesh is usually reserved for backbone networks.

Partial mesh topology: is less expensive to implement and yields less redundancy than full mesh topology. With partial mesh, some nodes are organized in a full mesh scheme but others are only connected to one or two in the network. Partial mesh topology is commonly found in peripheral networks connected to a full meshed backbone.

5. Hybrid Topology

A hybrid topology is a type of network topology that uses two or more differing network topologies. These topologies include a mix of bus topology, mesh topology, ring topology, star topology, and tree topology.

Advantages: It is extremely flexible, very reliable, and easily scalable

Disadvantages: It is expensive, the design of a hybrid network is complex and hardware changes are required in order to connect topology to another topology.

HOW TO BE A RESPONSIBLE NETIZEN?

You! Yes, you, the one who read this. Because you are here, you are now a certified citizen of the net or I can call you "netizen", but before that you are described as actively involved in online communities like Facebook, Instagram, twitter, youtube and many more.

For some research, The term commonly also implies an interest and active engagement in improving the Internet, making it an intellectual and a social resource, or its surrounding political structures, especially in regard to open access, net neutrality and free speech. The term was widely adopted in the mid-1990s as a way to describe those who inhabit the new geography of the Internet. Internet pioneer and author Michael F. Hauben is credited with coining and popularizing the term

But how could a good netizen become more responsible even there are many who don't do good manners and orderliness in the Internet world. Here are some tips on how you can act as a netizen:

• You should always be sensitive about what we don on the Internet because it can affect and hurt others.
• Express yourself in a good way were everyone can reach on you and have respect for each of everyone on the net.
• Be polite, it is always the important thing that we should carry.
• Use your common sense everything you do, always remember, "THINK BEFORE YOU CLICK"

• Privacy is a must, in order to have a smooth sailing experience we should know and value everything in the net.

• Not all information about you must not be exposed to the public dispose of, we should know what to SPILL and CONCEAL.

• Do not judge other people even we have the freedom to speak publicly.

• Keep in mind that the Internet is a public way of communication, we should uphold our morals and values because by this we can show who we are.

• "Don't do unto others, what you don't want to do unto you"

These are just some tips that can help you how to be a responsible citizen of net. Reading this is such a fun part where we can learn also we can enjoy our time using it. That's why as a responsible netizen, we should always think about what is best, what is right, and what is important. Always bear in mind a true Netizen always think before clicking.

You can also watch at:

https://www.youtube.com/watch?v=NFe8_pIR7r0

Source:
https://en.wikipedia.org/wiki/Netizen