Communication and information
Functions of computer networks
Computer network is used to link the different computer users within thedefined parameters. Computer network assignment help experts highlight thatthe chief functions of computer networks are to store, update, share andclassify data. Generally computers are linked to create a network via cablesand electronic gadgets like modems. The networks are used to: * Facilitate communication via email, video conferencing, instant messaging etc * Allow multiple users to share a single hardware device like a printer or scanner * Enable file sharing across the network * Allow sharing of software or operating programs on remote systems * Make the information easier to access and maintain among network users.If you want to know what are the facilities you can acquire from computernetwork in detailed manner, our experts are ready to provide computer networkassignment help the minute you need it. Get top-class computer networkassignment help from MyAssignmenthelp.com.
Networking sample – Database Management System
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WAN (Wide Area Network)
WAN is defined as the computer network that covers a broad area which may spanacross provinces and even whole country. In the sector of telecommunications,this type of system is utilized. This network is of extreme high speed. So theusers have to spend a huge amount of money to get the services from thisnetwork.Government entities, business organizations and other education facilities useWAN to get connected and transmit data to each other. Different technologiesare used to develop the wide area network links from integrated telephonelines, radio wave transmission and the optical fiber. The speed of the WAN hasincreased radically in the last few decades. From 110 bits per second in theyear 1960 to up to 100 G/bits per second now, the speed has improvedexponentially.
LAN (Local Area Network)
A network system installed in a building and operated under singleadministrative system is known as LAN. Generally, this type of network is usedin organization’s offices, schools, colleges/universities, etc.Usually, the LAN has a server of its own which has its own applications andstorage systems that are shared among the users. From two to a few hundred,the number of users within the LAN network can vary. Today, Ethernet and Wi-Fiare the most common forms of LAN usage. A wireless LAN is always preferred towired LAN due to its effectiveness, flexibility and cost. Simple LANscomprises of two to three switches which are connected to the router or modemfor internet access. A complex LAN consists of several switches which uses aspanning tree protocol to prevent loops and manage more volumes of datatransmission.
MAN (Metropolitan Area Network)
This type of network facilities equips the whole city such as cable TVnetwork. It can be used in various forms like Ethernet, Token-ring, ATM orFDDI. With accordance to the area of coverage, a MAN network covers largerarea than LAN but smaller than WAN. MAN links generally use microwave, radioor infra-red laser transmission to connect between two LANs. MANs are used to build high speed network for cities and towns which iseffective due to its medium range. The network of MAN can extend up to 40kilometers maintaining its speed and effectiveness. These days MAN networkswork on Distributed Queue Dual Bus (DQDB) with IEEE 802.6 standard of datacommunication giving a speed of transmission up to 155 Mbps.
Networking sample – Java Programming
The program must cater for each of the following requirements: 1. Register a new movie. The cinema needs to store the movie’s title, rating, duration, synopsis, release date, billed cast, director, genre, distributor and official website. 2. Schedule movie sessions. There is only one cinema screen, so only one movie can be shown at any time. 3. Display the movie listing. This lists all movies. When a movie is selected, list all the details for that movie, including its future session times. Download SampleThis wireless PAN is based on the standard IEEE 802.15. Bluetooth and Infrareddata transmission falls under the category of PAN.
SAN (System Area Network)
This network is linked to high performance computers with high-speedconnections in a cluster configuration. It is also known as Cluster AreaNetwork. System Area Network is capable of delivering very high bandwidth up to 1 Gbpswith a very low latency. A SAN is used to interconnect all the nodes within adistributed computer system referred to as a cluster. It is known for itssecurity and low error rates. SANs are especially effective for bulk datatransfer as it uses Remote Direct Memory Access Mechanism.
Communication and information
Networking, especially internet connectivity, allows its user to communicatein ways that was not possible before this technology was developed. Like,instant messaging permits the user to talk real time and send files on anotherside of the world. This is a potential boon for business users becauseinternet is the access to vast information.
Common network devices
Network devices are fundamental units of networking that carry data throughcomputer network. Our computer network assignment help experts draw attentionto the basic network devices that are used by numerous users:
NIC (Network Infrared Card)
It is a computer hardware component designed to allow computers to communicateover a computer network. Computers within the range can transfer files witheach other using this system. Computer infrared network adapters transmit andreceive data through ports on the side of the device. It can also be installedin laptops and other personal devices. The range of this infraredcommunications is effective only within 5 meters with a data transfer speed ofabout 4 mbps. But it cannot penetrate any barrier work only in direct ‘line ofsight’.
Types of Personal Area Network (PAN) Network
As we have discussed above, the PAN network is maintaining two types ofnetworks defined as, wired and wireless networks.The wired will be having the USB cable or firewire and can also make use ofthe base station.The wireless connection is where the nearby multiple devices get connected tothe main device or a master device using tools like Bluetooth, Irda, and alsoZigbee.
Advantages of Personal Area Network
1. Cost-EffectivePAN is considered a cost-effective network technology as there is not any typeof wire or cable. No extra data charges are applicable to browse the internet.It is cheaper than any other network technology. 2. SecureThis network is also more secure than any other network. It is very securedbecause every devices or signal are authorised before sharing that data orfile. In this, it is impossible to hacking devices or any third-partyinterference. 3. Many devices are connected at a single point of timeMany devices are interconnected with each other at the same time in PAN. Youcan connect a mobile phone with more than one device like any other mobile,keyboard, printer etc. That’s why your data or file is shared to many at thesame time. 4. ReliableThis type of network is more reliable or stable if it is used within 10 metresof range by you.