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Articles by Bhanu Priya
Page 16 of 107
What is Attenuation Distortion in computer networks?
Attenuation distortion is a type of transmission impairment that occurs when a signal loses strength as it travels through a communication medium. This phenomenon causes the received signal to have reduced amplitude compared to the original transmitted signal, potentially making it difficult for the receiver to properly interpret the data. Attenuation distortion affects both analog and digital signals. In analog transmission, the signal's amplitude decreases and its shape may change. In digital transmission, the weakened signal can cause bit errors, where 1s may be interpreted as 0s or vice versa. How Attenuation Distortion Works As signals propagate ...
Read MoreWhat are noise impairments in Computer networks?
Noise impairments are unwanted signals that interfere with data transmission in computer networks, causing the received signal to differ from the transmitted signal. Noise is one of the primary causes of transmission impairments that degrade signal quality and can lead to data corruption. In analog signals, noise causes changes in amplitude or wave shape, while in digital signals, noise can flip bits from 0 to 1 or vice versa, leading to transmission errors. Signal Transmission with Noise Original Signal: ...
Read MoreWhat are guided and unguided transmission media?
Transmission media is the physical path through which data signals travel in a network. It serves as the communication channel that connects different devices and systems. Telecommunication links are classified into two main categories: Guided media (wired) − uses physical cables or wires Unguided media (wireless) − uses electromagnetic waves through air Both types are used for short distance (LANs, MANs) as well as long distance (WANs) communication. Transmission Media Classification Guided Media (Wired) ...
Read MoreWhat are noiseless and noisy channels?
Data link layer protocols are categorized based on whether the transmission channel is noiseless or noisy. This classification determines the complexity of protocols required, with noiseless channels needing simpler protocols and noisy channels requiring sophisticated error control mechanisms. Data Link Layer Protocol Classification Noiseless Channels • Simplest Protocol • Stop & Wait No error control needed Noisy Channels • Stop & Wait ARQ • Go-Back-N ARQ • ...
Read MoreWhat are static routing algorithms in computer networks?
A static routing algorithm is a form of routing that occurs when a router uses manually configured routing entries rather than automatically discovered routes. In static routing, network administrators manually add routing entries to the routing table. Static routes are fixed and do not change automatically when the network topology is modified or reconfigured. Unlike dynamic routing protocols, static routes remain in the routing table until manually removed or modified by an administrator. Static and dynamic routing are not mutually exclusive approaches. They are commonly used together on routers to maximize routing efficiency and provide backup routes when ...
Read MoreWhat are load sensitive routing algorithms?
Load-sensitive routing algorithms are adaptive routing protocols that make path selection decisions based on the current network load and traffic conditions. These algorithms adjust routing paths dynamically to avoid congested links and optimize network performance. Load-sensitive routing was initially integrated into early Internet routing algorithms during the ARPANET era. However, it was later abandoned for several decades due to stability issues, including overreaction to network changes and permanent oscillation effects that degraded network performance. How Load-Sensitive Routing Works Load-sensitive routing algorithms continuously monitor network conditions such as link utilization, delay, and congestion levels. When a link becomes ...
Read MoreWhat is hierarchical routing?
In hierarchical routing, the routers are divided into regions. Each router has complete details about how to route packets to destinations within its own region, but it does not have any idea about the internal structure of other regions. As networks grow larger, the number of routers increases significantly. In traditional routing algorithms like Link State (LS) and Distance Vector (DV), every router needs to maintain information about all other routers. This causes routing tables to become extremely large, reducing efficiency. Hierarchical routing solves this scalability problem by organizing routers into a structured hierarchy. How Hierarchical Routing Works ...
Read MoreWhat are IPV6 Unicast Addresses in computer networks?
Internet Protocol version 6 (IPv6) allows data transfer to take place over networks with improved efficiency, performance, and security compared to IPv4. Most importantly, it enables service providers to reduce the size of their routing tables while providing a vastly expanded address space. Representation of IPv6 IPv6 consists of 128 bits represented by eight groups of hexadecimal digits, with each group containing 16 bits separated by colons. Example of IPv6 Address 2002:0db6:65a3:0000:0000:6a2e:0270:7443 IPv6 Address Types Unicast One-to-one ...
Read MoreWhat is UDP Datagram Format in computer networks?
The User Datagram Protocol (UDP) is a transport layer protocol defined for use with the IP network layer protocol. UDP provides a connectionless, unreliable datagram service that prioritizes speed and simplicity over guaranteed delivery. UDP Datagram Format The UDP datagram has an 8-byte header followed by the data payload. This compact header structure contributes to UDP's efficiency and low overhead. UDP Datagram Format Source Port (16 bits) Dest Port (16 bits) Length (16 bits) ...
Read MoreWhat are the Stream Control Transmission Protocol (SCTP) services?
The Stream Control Transmission Protocol (SCTP) is a transport layer protocol designed to address the limitations of TCP and UDP for modern Internet applications. Operating at the same layer as TCP and UDP, SCTP provides reliable, message-oriented communication with advanced features like multihoming and multistreaming. SCTP was specifically developed for applications that require more sophisticated services than TCP can provide, including telephony signaling protocols (IUA, M2UA, M3UA), media gateway control (H.248), and IP telephony applications (H.323, SIP). SCTP Protocol Stack Position Application Layer ...
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