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Articles by Ginni
Page 19 of 124
What is Dijikstra Algorithm?
The Dijkstra Algorithm is a widely used shortest path routing algorithm in computer networks. It finds the shortest path between nodes in a weighted graph by systematically exploring all possible routes and selecting the one with minimum cost. In network routing, this algorithm enables packets to travel along the shortest path from source to destination. However, it has limitations as it doesn't adapt to dynamic network conditions like congestion or varying traffic loads. How It Works Dijkstra's algorithm maintains a set of vertices whose shortest distance from the source is known. It uses a cost matrix C[S, ...
Read MoreWhat is DWDM?
Dense Wavelength Division Multiplexing (DWDM) is an optical multiplexing technology that combines multiple optical signals of different wavelengths (colors) into a single fiber optic cable. This technology enables transmission of numerous data channels simultaneously over long distances, dramatically increasing the bandwidth capacity of existing fiber infrastructure. DWDM works by using different wavelengths of laser light to carry separate data streams. Each wavelength acts as an independent communication channel, allowing multiple signals to travel through the same physical fiber without interference. Modern DWDM systems can support up to 80 or more channels with 100 GHz (0.8 nm) spacing between wavelengths. ...
Read MoreDescribe the Transport Layer in the Computer Network
The Transport Layer is the fourth layer in the OSI model, positioned between the network layer and session layer. It serves as a crucial intermediary that provides reliable end-to-end communication services between applications running on different hosts across a network. The transport layer's primary responsibility is to ensure data delivery with the required quality of service, including error detection and correction, flow control, and proper sequencing of data segments. It abstracts the complexities of the underlying network infrastructure from upper layers. Transport Layer in OSI Model ...
Read MoreWhat are the services provided by the transport layer?
The services provided by the transport layer ensure reliable end-to-end data delivery between applications running on different hosts. These services hide the complexities of the underlying network and provide a uniform interface to the session layer. Address Mapping Address mapping involves translating transport addresses to network addresses. When a session entity requests to send a Transport Service Data Unit (TSDU) to another session entity, it provides its transport service access point address for identification. The transport entity then determines the corresponding Network Service Access Point (NSAP) address to establish proper routing. Assignment of Network Connection The ...
Read MoreWhat is the difference between Flow Control and Error Control?
In network communication, both flow control and error control are essential mechanisms that ensure reliable data transmission between devices. While they work together, they serve different purposes in maintaining communication quality. Flow Control Flow control is a technique used to regulate the rate at which data is transmitted between sender and receiver. It prevents the sender from overwhelming the receiver with data that cannot be processed quickly enough, avoiding buffer overflow and data loss. The primary goal of flow control is to match the transmission speed with the receiver's processing capacity. When the sender transmits data faster ...
Read MoreWhat is the TCP Segment Header?
The TCP segment header is a fixed 20-byte structure that contains essential control information for reliable data transmission between network endpoints. Every TCP segment begins with this header, which may be followed by optional fields and data payload. TCP Segment Header Format (20 bytes) 0 16 32 Source Port (16 bits) Destination Port (16 bits) Sequence ...
Read MoreWhat is the difference between DSS and ESS?
Let us begin by learning about Decision Support Systems (DSS) and Executive Support Systems (ESS), two important types of information systems used in business organizations. Decision Support System (DSS) A Decision Support System (DSS) is a computer-based information system that supports business and organizational decision-making activities. It provides tools and capabilities to help decision-makers analyze data and make informed choices, but does not make the actual decisions. DSS collects, organizes, and analyzes business data from multiple sources including databases, files, personal knowledge, and business models. The system helps organizations identify problems, evaluate alternatives, and support decision-making processes ...
Read MoreWhat is the TCP Connection Establishment?
TCP Connection Establishment is the process by which two hosts create a reliable, connection-oriented session before transmitting data. This process ensures both sides are ready to communicate and agree on initial parameters for data exchange. To make transport services reliable, TCP uses a three-way handshake mechanism to establish connections. This mechanism synchronizes both ends of a network by enabling both sides to agree upon original sequence numbers and confirm readiness for data transmission. How the Three-Way Handshake Works The three-way handshake prevents packets from being shared or retransmitted during session establishment. Each host randomly selects a sequence ...
Read MoreExplain the TCP Connection Management
The TCP Connection Management involves establishing, maintaining, and terminating connections between two hosts using a reliable connection-oriented protocol. TCP uses a three-way handshake mechanism to create connections and ensure reliable data transfer. Connection Establishment Connection establishment in TCP follows a systematic process where one side acts as a server and the other as a client: Server Side − The server passively waits for incoming connections by implementing LISTEN and ACCEPT primitives on a specific port. Client Side − The client performs a CONNECT primitive, specifying the destination port and optional parameters like maximum ...
Read MoreWhat is TCP Connection Release?
A TCP connection release is the process of terminating an established TCP connection in a controlled manner. Since TCP provides a full-duplex connection, the release process treats it as two independent simplex connections that must be closed separately. The connection release process is symmetric, meaning either endpoint can initiate the termination by sending a TCP segment with the FIN (finish) bit set. This indicates that the sender has no more data to transmit. However, data can continue flowing in the opposite direction until that side also sends its FIN segment. How TCP Connection Release Works The standard ...
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