Unit-3 Computer Network Assignment Help
Unit-3 Computer Network Assignment Help are fundamental units of networking that carry data through computer network. Our computer network assignment help experts draw attention to the basic network devices that are used by numerous users:
It connects computers together in a star topology network. Hubs have multiple ports which are commonly used to connect segments of a network. When a data packet is inserted to one of its ports, it is copied to other ports to give all segments to see all packets. It performs as the central connection of the networking and carries data in the form of frames. When a port receives a frame, it gets amplified and is transmitted to the destination. Based on their utility, these hubs can be categorized into passive, intelligent and switching hubs.
It is an electronic device that receives a signal and retransmits it at a higher level or higher power. A repeater is used in the transmission systems to regenerate the digital as well as analog signals which are disturbed and distorted during dispatch and conveyance. It can use different protocols to relay the same messages.
Modem is a device that turns the digital 1s and 0s of a personal computer into sounds that can be transmitted over the telephones lines of Plain Old Telephone System (POTS). The name derives from it functionality, i.e, Modulator-Demodulator. All the computer data is digitally stored. The modem transforms all those data into analog waves which can be transmitted through the cable wires. Accordingly, the modem also changes the received analog waves into digital information for processing. Modems are classified by the amount of data that it can process and send in a given time as its speed is expressed in bytes per second.
NIC (Network Infrared Card)
It is a computer hardware component designed to allow computers to communicate over a computer network. Computers within the range can transfer files with each other using this system. Computer infrared network adapters transmit and receive data through ports on the side of the device. It can also be installed in laptops and other personal devices. The range of this infrared communications is effective only within 5 meters with a data transfer speed of about 4 mbps. But it cannot penetrate any barrier work only in direct ‘line of sight’.
According to our computer network assignment help experts, these are simple networking devices that make it possible to connect two dissimilar media types such as twisted pair with fiber optic cabling. Media converters support different data communication protocols which include Ethernet, DS3, E3, T1, J1 and also various multi cable fiber optics like twisted, coax etc. Users according to the need can attach a simple converter (when speed and duplex settings are identical) or switching converters (containing a network bridge to connect half-duplex segments). They are also used in metropolitan area networks.
It is similar to a hub and provides a central connection between two or more computers on a network, but with some intelligence. Also known as network switches, it uses the concept of packet switching to receive, process and forward data. It can process data through data link layer 2 and 3 of the OSI model. Commonly used in Ethernet switches, they are also effective in other forms of network including Fiber channel and Asynchronous Transfer Mode.
Unit-3 Computer Network Assignment Help
It operates at the data link layer of the OSI model. It can interlink two of their ports together at very high speed. It creates an aggregate network from two communication segments. It allows these different networks to transmit data distinctly while remaining separate.
It operates at the network layer of the OSI model and efficiently route information between Local Area Networks. A router forwards data packets along networks. They use Headers and also forwarding tables to determine and send the data through the best path and they also use protocols like ICMP to communicate with each other. Router does very little filtering of data especially the ones used for home and office. The main difference between a hub and a router is that a router always analyzes the data sent through the internet. Larger networks can use different types of routers like bridge router, core router, edge router, software router and wireless router.
It is a part of computer system or network that is designed to block unauthorized access while permitting outward communication. Firewalls of a device can be created through hardware or software or a combination of both. Every data entering or leaving the device needs to pass through this firewall and if any file does not qualify for the specified criteria, it gets automatically blocked. Hardware firewalls can be purchased by the user as a standalone product or it may be delivered with the main device. There are several techniques through which this firewall secures the system. The most effective types are packet filtering and application gateway procedure.
Basic DHCP (Dynamic Host Configuration Protocol) server
It sends a broadcast query requesting the necessary information from a DHCP server. With DHCP, the devices request IP addresses and networking parameters automatically from a DHCP server. It reduces the need of a manual network administration or an engineer to do it. The usage of DHCP minimizes the usage of configuration errors caused by manual IP address configuration, address conflicts etc. It simplifies network administration as the software itself manages and keeps a track of the IP addresses making the hassles of a user to minimum.
Computer network assignments
Computer network assignment help experts give prominence to the written tasks. There are so many forms of assignments and written construction model that students need to respond to. Computer network assignments involve assignments containing essay questions, chapter-based questions,
subject-based case studies and question-based assignments.
Say for example: “A connection is through a cable with bandwidth 10Mbps and a latency of 2ms. It is half-duplex, but there are no conflicts (A and B never send at the same time). Describe how the communication might proceed; what is the minimum total time taken for this entire exchange?”
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