Essay Understanding Computer Networks

But how does it work? The internet, based on the concept of “packet switching”, involves the travelling of small packets of data over one or more networks (Frenzel, 2013). This can be compared to “electronic postcards”, meaning that “a computer generates a piece of data and flings it into the net, just like the postal system, except 100 million times faster” (Cerf, 2013). This concept allows one computer to speak to many different computers around the network by sending out these “electronic postcards”. However, before these networks can work seamlessly together, they must use a common protocol, or set of rules for transmitting and receiving these packets of data. There are several protocols currently in use, including the OSI Model, the TCP/IP Model, UDP, HTTP, and FDP (Mitchell, 2014), but the most commonly used is Transmission Control Protocol/Internet Protocol (TCP/IP) (Gilmer, 2011). Even as early as 1977, TCP/IP was being used by other networks to link to ARPANET (Kozierok,

In this modern day and age of computing, networks are a huge part of IT. It is important now more than ever that data sent over any network, whether it be a LAN (Local Area Network) or WAN (Wide Area Network; The Internet) is kept safe, private (when required) and uninterrupted in

7. What is the piece of hardware that allows a device to physically access a network?

When used by two or more people it is sometimes called a home area network(HAN)

According to (Burke, 2004),A switch is a multiport bridge. When a switch receives a frame (A data packet with address and other protocol information embedded), it amplifies the signal, looks at the MAC address to determine which port should retransmit the frame to get it to the intended network device and sends it to that port. The switch can be configured to disconnect any attached device, to discard frames intended for an attached device, to send frames with a specific hardware address to another hardware address instead and to copy a frame to a mirror port which can send it to an attached traffic monitor.

transmission of structures to generate digital indicators distorted by the loss of the transmission. Hubs function as repeaters by transmitting messages to the related computers. The repeater does intellectual routing that can be acted upon by routers and bridges (Vachhani,

HUB - An Ethernet hub, active hub, network hub, repeater hub, multiport repeater or hub is a device for connecting multiple Ethernet devices together and making them act as a single network segment.

A router is a device that is used to connect dissimilar device. It is present and operates at the Network layer of the OSI model.

Ethernet is typically the technology that is used to allow computers locally to communicate with one another. Computers that are close to each other they are connected by Ethernet.

A Router is a Layer 3 or Network layer device that connects a network to another network. It connects networks with the same protocol such as RIP (Routing Information Protocol) and IP (Internet Protocol).

Third, there is a set of software that allows the computer to send data across this network. There are a lot

Network Devices: Network devices include all devices, which help make a network workable. These include Hubs (Enables more than one computer to interconnect on a network), Routers (Connects two networks), Switch (Joins multiple computers within one LAN and a Bridge (Allows one network to connect to another

Network security has changed significantly over the past years. There is more and more data to monitor and analyze in order to detect the activity of your data and systems. Securing a network has many variables. Password authentication, network access, patches, anti-virus protection, intrusion detection, firewall and network monitoring tools are just a few of the things you can do to protect yourself.

Cyber Security also called computer security and IT security, is the assurance of data from theft or any harm to the gadget, the product and information stored on hardware. It incorporates controlling physical access to the equipment and additionally ensuring against code or data injection or via network access.

Advancements in the information technology sector have brought many benefits to the people all around the world.  Today with computer networking, we can chat, speak and see each other over a long distance. Data communication refers to the transmission of the digital signals over a communication channel between the transmitter and receiver computers. Communication is possible only with wired and wireless connectivity of the computers with each other.