HP mt41 HP Velocity Technology Overview - Page 13
LiveTCP, TCP congestion avoidance mechanisms, TCP algorithms, TCP Tuning, LiveTCP congestion control
View all HP mt41 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 13 highlights
LiveTCP Real-world IP networks introduce both latency and packet loss to application flows. A primary cause of these issues is network congestion. TCP retransmits lost packets, providing applications with guaranteed, correctly sequenced packet delivery. TCP also has built-in algorithms to avoid excessive congestion of the network. Both latency and packet loss degrade the end user QoE, especially for applications that use TCP for reliable data transmission, such as video streaming, chat, remote desktop, and file transfers. This results in unresponsive user interfaces for remote desktop users, extended wait times for file transfers, and choppy video with reduced frame rates. TCP congestion avoidance mechanisms TCP is designed to send data as rapidly as possible until it detects packet loss. Once packet loss is detected, TCP will guarantee delivery by retransmitting, halting delivery to preserve ordered packet transmission, and reducing transmission speed. When packet loss dissipates, TCP will again increase the speed of data delivery. The speed of data delivery might be impacted by standard TCP. TCP algorithms TCP can be controlled by different algorithms to accommodate different types of networks. However, only one network type at a time can be accommodated under native TCP. For example, LANs are characterized by low packet loss and high bandwidth. Remote office networks typically have high packet loss and high latency. WiFi networks have high jitter (the latency is highly variable) and variable throughput capacity. TCP Tuning Most operating systems allow only a single TCP algorithm to be active with a single set of settings. If a network is optimized for LAN traffic, WAN connections will be less efficient. While the TCP stack can be tuned, the effort required by network administrators is a deterrent. LiveTCP provides tuning automatically, which boosts TCP throughput over all networks and provides latency mitigation for streaming applications. LiveTCP congestion control LiveTCP adapts its algorithm to automatically provide congestion control that is optimized independently for each TCP flow (LAN, remote network, WiFi) and the conditions in the network. LiveTCP achieves this without requiring any intervention from IT. HP Velocity Technology Overview 13