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This article will help you understand how to multiplex SSH sessions by setting up a master session and using a multiplexer to speed up SSH connections on Linux. What is SSH Multiplexing? SSH Multiplexing allows multiple SSH sessions to share a single TCP/IP connection. Instead of establishing separate connections for each SSH session, subsequent connections reuse the existing master connection, reducing server load and improving connection speed. SSH Multiplexing: Single Connection, Multiple Sessions Client Server Master TCP Connection ... Read More
A coaxial cable is a type of electrical cable consisting of a central copper conductor surrounded by insulating material, which is then enclosed by a conductive shield and an outer insulating jacket. This design provides excellent signal transmission capabilities with minimal interference. Coaxial Cable Structure Outer PVC Jacket Copper Mesh Shield PVC Insulation ... Read More
Layer 2 Forwarding (L2F) is a tunneling protocol developed by Cisco Systems for creating Virtual Private Networks (VPNs) over public networks like the Internet. L2F operates at the data-link layer and tunnels Layer 2 protocols such as Point-to-Point Protocol (PPP) and Serial Line Internet Protocol (SLIP) across IP networks. Unlike IP-dependent protocols, L2F is media-independent and can operate over various network infrastructures including Frame Relay and ATM. The protocol enables server-side capabilities like user authentication via RADIUS, dynamic address allocation, and Quality of Service (QoS) management. How L2F Works L2F creates an end-to-end tunnel between a client ... Read More
Transmission Control Protocol/Internet Protocol (TCP/IP) is a suite of communication protocols that enables reliable data transmission across networks. TCP handles message segmentation and reassembly, while IP manages packet addressing and routing to ensure data reaches the correct destination. TCP/IP revolutionized network communication by providing a standardized method for computers to communicate over public networks like the Internet. It defines how information is packaged, addressed, transmitted, and received between network devices. TCP/IP Four-Layer Model Application Layer HTTP, HTTPS, FTP, SMTP, SSH ... Read More
Third generation mobile phones, or 3G mobile phones, represent a set of standards for wireless mobile communication systems that deliver high-quality multimedia services alongside superior voice transmission. 3G technology marked a significant leap from 2G systems by introducing high-speed data transmission and advanced internet capabilities. 3G Mobile Technology Evolution 2G Voice + SMS ~64 kbps 3G Multimedia 2+ Mbps 4G/5G Broadband 100+ Mbps ... Read More
Bandwidth Delay Product (BDP) is a measurement of how many bits can fill up a network link. It gives the maximum amount of data that can be transmitted by the sender at a given time before waiting for acknowledgment. Thus it represents the maximum amount of unacknowledged data that can be "in flight" on the network. Bandwidth Delay Product Visualization Sender Receiver Data Transmission Acknowledgment BDP = Bandwidth × Round Trip Time ... Read More
A fibre optic cable is a high-speed data transmission medium made of glass or plastic that transmits information using light signals. Unlike traditional copper cables that use electrical signals, fibre optic cables use light pulses to carry data at incredible speeds over long distances with minimal signal loss. Structure of Fibre Optic Cable Core (Glass) Cladding Protective Jacket Light Ray Path Light travels through the core, reflected by the cladding layer ... Read More
Routers are critical networking equipment that control data flow across networks. They contain limited buffer memory for temporarily storing packets before forwarding them to their destinations. When the arrival rate of packets exceeds the rate at which packets can be processed and transmitted, packet queuing and potentially packet dropping occurs. This situation arises because routers must balance finite memory resources with varying traffic loads. Effective queuing disciplines are essential for managing packet flow, minimizing delays, and ensuring fair resource allocation among different traffic types. Router Packet Queuing Process ... Read More
A trunk is a high-capacity communication channel that connects switching centers, forming the backbone of telecommunication networks. Trunks are designed to carry large volumes of voice and data traffic simultaneously over long distances using multiplexing techniques. Unlike local loops that connect individual subscribers to the nearest switching office, trunks handle the bulk transmission of aggregated traffic between network nodes. They represent the core infrastructure that enables telecommunications networks to scale efficiently. Trunk Network Architecture End Office A (Local Switch) ... Read More
In computer networking, pipelining is the method of sending multiple data units without waiting for an acknowledgment for the first frame sent. Pipelining ensures better utilization of network resources and also increases the speed of delivery, particularly in situations where a large number of data units make up a message to be sent. How Pipelining Works In traditional stop-and-wait protocols, the sender transmits one frame and waits for its acknowledgment before sending the next frame. This approach leads to inefficient use of available bandwidth, especially in high-latency networks. Pipelining allows multiple frames to be transmitted continuously without waiting ... Read More