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Articles on Trending Technologies
Technical articles with clear explanations and examples
What 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 MoreWhat is baseband transmission in computer networks?
Baseband transmission is a digital communication method where data is transmitted using the original frequency range of the signal without shifting it to higher frequency bands. In this transmission technique, the entire bandwidth of the communication channel is occupied by a single signal. Unlike passband transmission where signals are modulated to higher frequencies, baseband transmission sends digital data directly using its natural frequency spectrum. This makes it ideal for short-distance communication within local networks. How Baseband Transmission Works The process begins with line encoding, where digital bits are converted into electrical signals. The most common encoding scheme ...
Read MoreCable Modem Termination System (CMTS)
A Cable Modem Termination System (CMTS) is a hardware device located at the headend of a cable TV network that connects cable subscribers to their Internet Service Provider (ISP). It enables high-speed data services like Internet access and Voice over Internet Protocol (VoIP) over the existing cable TV infrastructure. CMTS in Cable Network Architecture CMTS Headend HFC Network CM CM CM Internet/ISP ...
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 MoreOrganizationally Unique Identifier
An Organizationally Unique Identifier (OUI) is a 24-bit number assigned by the IEEE Registration Authority to manufacturers or vendors of network devices. These globally unique identifiers serve as the foundation for creating unique device addresses on computer networks. OUIs are primarily used to construct MAC addresses, which uniquely identify network interfaces. A MAC address consists of 6 octets (48 bits total), where the first three octets form the OUI, identifying the manufacturer, and the last three octets represent the device-specific identifier assigned by that manufacturer. OUI Structure and Format A 3-octet OUI is typically represented in hexadecimal ...
Read MoreSharing is Caring: The Magic of Multiplexing in Computer Networks
Multiplexing is a fundamental technique in computer networks that enables multiple signals to share a single communication channel simultaneously. By dividing the channel's capacity into logical segments, multiplexing optimizes bandwidth utilization and reduces infrastructure costs while maintaining reliable data transmission. This technique is essential in modern networks where efficient resource sharing directly impacts performance and cost-effectiveness. From telephone systems to internet infrastructure, multiplexing forms the backbone of efficient communication. Multiplexing: Multiple Signals, Single Channel Signal A Signal B Signal ...
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 ...
Read MoreWhat are data link layer design issues?
The Data Link layer is located between physical and network layers. It provides services to the Network layer and receives services from the physical layer. The scope of the data link layer is node-to-node communication. OSI Layer Stack - Data Link Layer Position Network Layer Data Link Layer Physical Layer Services to Network Layer Services from Physical Layer Node-to-node communication scope The following are the ...
Read MoreWhat are the differences between FDMA, TDMA, and CDMA?
Multiple users need to share a communication channel efficiently. FDMA (Frequency Division Multiple Access), TDMA (Time Division Multiple Access), and CDMA (Code Division Multiple Access) are three fundamental techniques that enable multiple users to access the same communication medium without interference. FDMA (Frequency Division Multiple Access) FDMA is an analog technique that divides the available frequency spectrum into separate frequency bands. Each user is assigned a unique frequency band for the entire duration of their communication session. In FDMA, the total bandwidth of the channel is divided into logical channels, with each transmitting device given exclusive control ...
Read MorePositive Acknowledgement with Retransmission (PAR)
Positive Acknowledgement with Retransmission (PAR) is a group of error-control protocols for transmission of data over noisy or unreliable communication networks. These protocols reside in the Data Link Layer and Transport Layer of the OSI model. They provide automatic retransmission of frames that are corrupted or lost during transit. PAR is also called Automatic Repeat Request (ARQ). PAR protocols are used to provide reliable transmissions over unreliable network services. They are commonly implemented in wireless communication systems like GSM networks, where signal interference and packet loss are frequent challenges. Working Principle In PAR protocols, the receiver sends ...
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