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
DID YOU KNOW?
13 Twitter Tips and Tricks to Tweet Like a Pro

From celebrity tweets to hosting live Twitter chats, our favorite Twitter tips will have you tweeting like a pro in no time. Read More »

Interesting Times: Transformation in the IT Channel

Business transformation will remain the buzzword of the moment as channel firms continue to assess the direction of their companies in the age of... Read More »

11 Tips to Boost Your Wi-Fi Signal

It's not just your lawnmower and household tools that your neighbor won't return. Our top picks include everything from updating device firmware... Read More »

QUICK REFERENCE
29 Free Android Apps for Cash-Strapped Students

From wacky alarm clocks to lecture hall tools and after class entertainment, these Android apps are a good fit for a student's life and budget. Read More »

Network Fundamentals Study Guide

A network is a group of two or more computer systems or devices, linked together to share resources, exchange files and electronic communications.... Read More »

Computer Architecture Study Guide

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