invalid$40539$ - определение. Что такое invalid$40539$
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Что (кто) такое invalid$40539$ - определение

Invalid packet

invalid         
WIKIMEDIA DISAMBIGUATION PAGE
Invalid (disambiguation)
I. a.
1.
Weak, of no weight, of no force.
2.
(Law.) Void, null, of no legal force, null and void.
3.
Unsound, unfounded, baseless, untrue, fallacious, that does not hold (good).
II. a.
Weak, feeble, infirm, sick, sickly, weakly, frail, valetudinary.
III. n.
Valetudinarian, feeble person, infirm person, sick person.
invalid         
WIKIMEDIA DISAMBIGUATION PAGE
Invalid (disambiguation)
1.
An invalid is someone who needs to be cared for because they have an illness or disability.
I hate being treated as an invalid.
N-COUNT
2.
If an action, procedure, or document is invalid, it cannot be accepted, because it breaks the law or some official rule.
The trial was stopped and the results declared invalid...
ADJ
3.
An invalid argument or conclusion is wrong because it is based on a mistake.
We think that those arguments are rendered invalid by the hard facts on the ground.
ADJ
Invalid         
WIKIMEDIA DISAMBIGUATION PAGE
Invalid (disambiguation)
·vt To make or render invalid or infirm.
II. Invalid ·vt To classify or enroll as an invalid.
III. Invalid ·adj Of no force, weight, or cogency; not valid; weak.
IV. Invalid ·noun Not well; feeble; infirm; sickly; as, he had an invalid daughter.
V. Invalid ·adj Having no force, effect, or efficacy; void; null; as, an invalid contract or agreement.
VI. Invalid ·adj A person who is weak and infirm; one who is disabled for active service; especially, one in chronic ill health.

Википедия

Mangled packet

In computer networking, a mangled or invalid packet is a packet — especially IP packet — that either lacks order or self-coherence, or contains code aimed to confuse or disrupt computers, firewalls, routers, or any service present on the network.

Their usage is associated with a type of network attack called a denial-of-service (DoS) attack. They aim to destabilize the network and sometimes to reveal its available services – when network operators must restart the disabled ones. Mangled packets can be generated by dedicated software such as nmap.

As of 2008, most invalid packets are easily filtered by modern stateful firewalls.