laboursonline – MCQs, Mock Tests | Computer Hardware and Networking Information and Network Security Set 1

An algorithm in encryption is called _____________.

1. Algorithm
2. Procedure
3. Cipher
4. Module

✅ Correct Answer: 3

The information that gets transformed in encryption is ____________.

1. Plain text
2. Parallel text
3. Encrypted text
4. Decrypted text

✅ Correct Answer: 1

In brute force attack, on average half of all possible keys must be tried to achievesuccess.

1. True
2. False
3. none
4. all

✅ Correct Answer: 1

A (n) ______ algorithm transforms ciphertext to plaintext.

1. Encryption
2. Decryption
3. Either (a) or (b)
4. Neither (a) nor (b)

✅ Correct Answer: 2

The ________ is the message after transformation.

1. Ciphertext
2. Plaintext
3. Secret-text
4. None of the above

✅ Correct Answer: 1

Which of the following is not a type of virus?

1. Boot sector
2. Polymorphi
3. C Multipartite
4. Troj

✅ Correct Answer: 1

A computer ________ is a malicious code which self-replicates by copying itself to otherprograms.

1. Program
2. Virus
3. Application
4. Worm

✅ Correct Answer: 2

__________ infects the master boot record and it is challenging and a complex task toremove this virus.

1. Boot Sector Virus
2. Polymorphi
3. C Multipartite
4. Troj

✅ Correct Answer: 1

_______ infects the executable as well as the boot sectors.

1. Non-resident virus
2. Boot Sector Virus
3. Polymorphic Virus
4. Multipartite Virus

✅ Correct Answer: 4

Trojan creators do not look for _______________.

1. Deleting Data
2. Protecting Data
3. Modifying Data
4. Copying Data

✅ Correct Answer: 2

Once activated __________ can enable ____________to spy on the victim, steal theirsensitive information & gain backdoor access to the system.

1. Virus, Cyber-Criminals
2. Malware, Penetration Testers
3. Trojans, Cyber-Criminals
4. Virus, Penetration Testers

✅ Correct Answer: 3

During a DOS attack, the regular traffic on the target _____________ will be eitherdawdling down or entirely interrupted.

1. Network
2. System
3. Website
4. Router

✅ Correct Answer: 3

The intent of a __________ is to overkill the targeted server’s bandwidth and otherresources of the target website.

1. Phishing attack
2. DoS attack
3. Website attack
4. MiTM attack

✅ Correct Answer: 2

In ________ some cyber-criminals redirect the legitimate users to different phishingsites and web pages via emails, IMs, ads and spyware.

1. URL Redirection
2. DOS
3. Phishing
4. MiTM attack

✅ Correct Answer: 3

Trojan creators do not look for _________

1. Credit card information
2. Confidential data
3. Important documents
4. Securing systems with such programs

✅ Correct Answer: 4

When one participant in a communication pretends to be someone else, it is called_________?

1. Virus Attacks
2. Data Driven Attacks
3. Data Driven Attacks
4. Masquerade

✅ Correct Answer: 4

_____ is a term used to describe a phishing attack that is specifically aimed at wealthy, powerful, or prominent individuals. Generally CEO’s and important celebrities.

1. Message Authentication Code
2. Steganography
3. Whale phishing
4. A cipher

✅ Correct Answer: 3

Compromising confidential information comes under _________.

1. Bug
2. Threat
3. Vulnerability
4. Attack

✅ Correct Answer: 2

When an attacker sends unsolicited communication, it is an example of_____.

1. Spoofing
2. Spamming
3. Crackers
4. Sniffers

✅ Correct Answer: 1

Masquerading is _______.

1. Attempting to hack a system through backdoors to an operating system or application.
2. Pretending to be an authorized user
3. Always done through IP spoofing
4. Applying a subnet mask to an internal IP range

✅ Correct Answer: 2

Integrity is protection of data from all of the following except ____

1. Unauthorized changes
2. Accidental changes
3. Data analysis
4. Intentional manipulation

✅ Correct Answer: 3

A security program cannot address which of the following business goals?

1. Accuracy of information
2. Change control
3. User expectations
4. Prevention of fraud

✅ Correct Answer: 1

The absence of a fire-suppression system would be best characterized as_______.

1. Exposure
2. Threat
3. Vulnerability
4. Risk

✅ Correct Answer: 3

Asymmetric key cryptography is used for all of the followingexcept_______

1. Encryption of data
2. Access control
3. Nonrepudiation
4. Steganography

✅ Correct Answer: 4

Firewalls are to protect against________.

1. Virus Attacks
2. Fire Attacks
3. Data Driven Attacks
4. Unauthorized Attacks

✅ Correct Answer: 4

The first computer virus is__________.

1. The famous
2. HARLIE
3. PARAM
4. Creeper

✅ Correct Answer: 4

___ is the practice and precautions taken to protect valuable information from unauthorized access, recording, disclosure or destruction.

1. Network Security
2. Database Security
3. Information Security
4. Physical Security

✅ Correct Answer: 3

From the options below, which of them is not a vulnerability to information security?

1. Without deleting data, disposal of storage media
2. Latest patches and updates not done
3. Floo
4. D Unchanged default password

✅ Correct Answer: 3

Possible threat to any information cannot be ________________.

1. Ignored
2. Protected
3. Transferre
4. D Reduced

✅ Correct Answer: 1

A _________ can gain access illegally to a system if the system is not properly tested inscanning and gaining access phase.

1. Security officer
2. Malicious hacker
3. Security auditor
4. Network analyst

✅ Correct Answer: 2

____________ is the process or mechanism used for converting ordinary plaintext into garbled non-human readable text & vice-versa.

1. Malware Analysis
2. Exploit writing
3. Reverse engineering
4. Cryptography

✅ Correct Answer: 4

When plain text is converted to unreadable format, it is termed as _____

1. Rotten text
2. Raw text
3. Cipher-text
4. Cipher

✅ Correct Answer: 3

__ is a means of storing & transmitting information in a specific format so that only those for whom it is planned can understand or process it.

1. Malware Analysis
2. Cryptography
3. Reverse engineering
4. Exploit writing

✅ Correct Answer: 2

Cryptography can be divided into ______ types.

1. 4
2. 2
3. 7
4. 3

✅ Correct Answer: 2

Data which is easily readable & understandable without any special algorithm ormethod is called _____________

1. Cipher-text
2. Plain text
3. Raw text
4. Encrypted text

✅ Correct Answer: 2

Plain text are also called _____________.

1. Encrypted text
2. Clear-text
3. Raw text
4. Cipher-text

✅ Correct Answer: 3

There are ________ types of cryptographic techniques used in general.

1. 2
2. 3
3. 4
4. 5

✅ Correct Answer: 2

Conventional cryptography is also known as _____________ or symmetric-keyencryption.

1. Secret-key
2. Public key
3. Protected key
4. Primary key

✅ Correct Answer: 1

Data Encryption Standard is an example of a _____________ cryptosystem.

1. Conventional
2. Public key
3. Hash key
4. Asymmetric-key

✅ Correct Answer: 1

____ Cryptography deals with traditional characters, i.e., letters & digits directly.

1. Latest
2. Asymmetri
3. C Classic
4. Modern

✅ Correct Answer: 3

________ Cryptography operates on binary-bit series and strings.

1. Modern
2. Classi
3. C Traditional
4. Primitive

✅ Correct Answer: 1

_____ is a mono-alphabetic encryption code wherein each & every letter of plaintext is replaced by another letter in creating the cipher-text.

1. Polyalphabetic Cipher
2. Caesar Cipher
3. Playfair Cipher
4. Monoalphabetic Cipher

✅ Correct Answer: 2

_______ is the concept that tells us about the replacement of every alphabet by another alphabet and the entire series gets ‘shifted’ by some fixed quantity.

1. Rolling Cipher
2. Shift Cipher
3. Playfair Cipher
4. Block Cipher

✅ Correct Answer: 2

n Playfair cipher, at first, a key table is produced. That key table is a 5 by 5 grid of alphabets which operates as the key to encrypt the plaintext.

1. Rolling Cipher
2. Shift Cipher
3. Playfair Cipher
4. Block Cipher

✅ Correct Answer: 3

___________ employs a text string as a key that is implemented to do a series ofshifts on the plain-text.

1. Shift Cipher
2. Block Cipher
3. Playfair Cipher
4. Vigenere Cipher

✅ Correct Answer: 4

The ________________ has piece of the keyword that has the same length as that of theplaintext.

1. One-time pad
2. Hash functions
3. Vigenere Cipher
4. Block Cipher

✅ Correct Answer: 1

In _______________ the plain-text is processed 1-bit at a time & a series of actions is carried out on it for generating one bit of cipher-text.

1. Vigenere Cipher
2. Block Cipher
3. Stream cipher
4. One-time pad

✅ Correct Answer: 3

In _____________ a sequence of actions is carried out on this block after a block of plain-text bits is chosen for generating a block of cipher-text bits.

1. Hash functions
2. Vigenere Cipher
3. One-time pa
4. D Block Cipher

✅ Correct Answer: 4

The procedure to add bits to the last block is termed as _______________

1. Padding
2. Hashing
3. Tuning
4. Decryption

✅ Correct Answer: 1

Which of the following is not an example of a block cipher?

1. DES
2. Caesar cipher
3. Twofish
4. IDEA

✅ Correct Answer: 1

DES stands for ________________.

1. Device Encryption Standard
2. Data Encrypted Standard
3. Data Encryption Security
4. Data Encryption Standard

✅ Correct Answer: 4

____ carries out all its calculations on bytes rather than using bits and is at least 6-times faster than 3-DES.

1. Twofish
2. IDEA
3. DES
4. AES

✅ Correct Answer: 4

AES stands for ________________.

1. Active Encryption Standard
2. Advanced Encrypted Standard
3. Advanced Encryption Standar
4. D Advanced Encryption Security

✅ Correct Answer: 3

AES is at least 6-times faster than 3-DES.

1. True
2. False
3. none
4. all

✅ Correct Answer: 1

___________ is another data hiding technique which can be used in conjunction with cryptography for the extra-secure method of protecting data.

1. Chorography
2. Tomography
3. Steganography
4. Cryptography

✅ Correct Answer: 3

______ is hiding of data within data, where we can hide images, text, and other messages within images, videos, music or recording files.

1. Steganography
2. Cryptography
3. Chorography
4. Tomography

✅ Correct Answer: 1

Steganography follows the concept of security through obscurity.

1. True
2. False
3. none
4. all

✅ Correct Answer: 1

The word ________________is a combination of the Greek words ‘steganos’ which means “covered or concealed”, and ‘graphein’ which means “writing”.

1. Tomography
2. Chorography
3. Steganography
4. Cryptography

✅ Correct Answer: 3

Which of the following is not a steganography tool?

1. Steghide
2. Reaper Exploit
3. Image steganography
4. Xaio steganography

✅ Correct Answer: 2

Which of the following is not a steganography tool?

1. rSteg
2. Crypture
3. SteganographX Plus
4. Burp Suite

✅ Correct Answer: 4