Webopedia on Google+Webopedia on TwitterWebopedia on FacebookTech Bytes Blog
Main » TERM » H »

hammering

The act of trying repeatedly to connect to an unavailable FTP server with little or no time between connection attempts. It can be compared to repeatedly hitting the "redial" button on a telephone when dialing a phone number that is busy until the other phone is no longer busy.

Trading servers have a limit on the number of active connections that may be present at one time. A server cannot process an unlimited number of requests, so when servers are occupied to full capacity they will deny further access until they have free space. Hammering consumes bandwidth, slowing down the server. In addition to already working at capacity, the server has to then send a busy response to the device that was unable to connect every time that device attempts a connection, which further depletes the server's resources and slows the system down in its connections with other devices.

Most FTP sites have policies against hammering and require FTP clients to set retry times at specific intervals, commonly at least 120 seconds between each attempt to connect. Most FTP sites can also monitor for devices that hammer, and once detected the server will ban access to the offending IP address either permanently or for a limited amount of time.







TECH RESOURCES FROM OUR PARTNERS
LATEST ARTICLES
8 Agenda Apps to Help Students Stay Organized

Webopedia's student apps roundup will help you to better organize your class schedule and stay on top of assignments and homework. Read More »

List of Free Shorten URL Services

A URL shortener is a way to make a long Web address shorter. Try this list of free services. Read More »

Top 10 Tech Terms of 2015

The most popular Webopedia definitions of 2015. Read More »

STUDY GUIDES
The 7 Layers of the OSI Model

The Open System Interconnection (OSI) model defines a networking framework to implement protocols in seven layers. Use this handy guide to compare... Read More »

Computer Architecture Study Guide

This Webopedia  study guide describes the different parts of a computer system and their relations. Read More »

What Are Network Topologies?

Network Topology refers to layout of a network. How different nodes in a network are connected to each other and how they communicate is... Read More »