What are the different method to control the robot?

[chinmay.sahoo]

Robots.txt
Robots Meta Tag
Rel= nofollow

[priya456]

The easiest way to control a robot is using a handheld controller connected physically to the robot using wires or a cable. Toggle switches on the controller allow you to control the robot without using electronics and act to connect motors and battery directly. Such robots usually have no intelligence.
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[anirban09P]

There are two method to control to bots via robots.txt and use of robot meta in page.

[Naksh]

robots.txt is used to inform the crawlers which pages to crawl and which not. Through meta tags, crawlers can be controlled.