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3 years ago

If nothings faster than light then how do the dark get there first????

Computers and Technology

2 answers:

Nadya [2.5K]3 years ago

3 0

Idk magic???? if thats not correct i dont know what is

irina [24]3 years ago

3 0

Darkness only happens because of the lack of light. For instance, when it's nighttime the only reason it's dark is because there is not enough light to create, well, light.<span />

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Why do we need multitasking functionality in an Operating System?

Leokris [45]

Answer:

Multitasking is a process in which we do multiple task at a time.

In computing system, multitasking is the concept of performing different types of multiple task and process over a certain period of time by executing simultaneously.

Operating system basically allow various task to run simultaneously by the user. In an operating system, each task consume storage system and all the other resources.

Multitasking function facilitate memory isolation in the processor and also supported different levels of security system in the operating system. For example, "a programmer working on any program in a system and as well as listening the music then, it perform multiple task at the same time".

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3 years ago

A company is executing a strategy to encrypt and sign all proprietary data in transit. The company recently deployed PKI service

Softa [21]

Answer:

A. S/MIME

B. TLS

C. Kerberos

Explanation:

PKI : Public Key Infrastructure is a technique which will allow services or applications to communicate securely across the unsecured network or internet.

PKI mainly consist of CA or Certificate Authority who can issue digital certificates or they are also known as trusted CA. exmaples are godaddy, digicert, verizone, symmantec, etc.. and RA also known as Registration Authorities and they verify if the requested certificates can be stored at CA. Keys will be stored in the central directory.It will also consists of certificate management system and the policies governing PKI.

S/MIME : Secure/Multipurpose Internet Mail Extensions which use assymentric cryptography and sign the MIME data. S/MIME will provide services like Authentication, Encryption , Integrity, Privacy and Non repudiation for messaging applications

SMIME uses certificates which can be self signed or CA certified. It specifies MIME type as $application/pkcs7-mime$ while transmitting the data.

TLS : Transport Layer Security. the earlier versions used to be known as SSL ( Secure Socket Layer) SSLv3 got depreciated and TLSv1.2/1.3 are popularly used to provide encryption, authentication, Integrity and Hashing for client to server side communication.

Most of the applications communicate securely using TLS. They will establish secure TCP connection using SSL Handshake. During the Handshake they will exchange supported versions, ciphersuites and certificates. Applications which uses TLS always uses CA certificates and Inhouse applications can communicate using self signed certificate or even with CA certificates.

HTTPS which is also known as HTTP over SSL is widely used for almost all the web services to communicate securely across the internet.

Kerberos : It is a protocol used to prove the identity for two nodes which are communicating with each other. Kerberos uses both symmetric key cryptography and assymetric key cryptography. However, symmetric key cryptography is used widely and public key cryptography is used optionally.

Authentication server which is also known as AS is used to authenticate the requesting client. It further forwards the user credentials to key distribution center. KDC further issues to TGT ( ticket granting ticket) and it uses TGS's secret key to encrypt. User will receive a encrypted output.

When a User Login then The client authenticates itself to the Authentication Server (AS) which forwards the username to a key distribution center (KDC). The KDC issues a ticket-granting ticket (TGT), which is time stamped and encrypts it using the ticket-granting service's (TGS) secret key and returns the encrypted result to the user's workstation. Sessions will be renewed and managed by users session manager.

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3 years ago

A network administrator wants to change the frequency of their wireless network to allow more channels that do not interfere wit

MA_775_DIABLO [31]

Answer:

2.4GHz

Explanation:

In the 2.4 GHz band, 1, 6, and 11 are the only non-overlapping channels

8 0

3 years ago

Step into the year 2028. How are people viewing digital video? Or have we moved on to a completely new format?

WINSTONCH [101]

In the year 2028 I don't believe our digital video viewing experience would change too much considering most, if not all, the population is already satisfied with how easy, simple, and versatile our current experience is. If everything changes one thing will for sure remain unchanged. That one thing is cinemas, I don't think cinemas will ever change much as they provide a constant source of revenue while providing a place for family and friends to get together to watch a movie before it becomes available to other sources.

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3 years ago

The proof that the Clique problem is NP-complete depends on a construction given in Theorem 34.11 (p. 1087), which reduces 3SAT

ki77a [65]

Answer:

Check the explanation

Explanation:

Kindly check the attached image below to see the step by step explanation to the question above.

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3 years ago