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WGU C839 Study guides, Class notes & Summaries
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WGU C839 EXAM 100 REAL EXAM QUESTIONS AND CORRECT ANSWERS (VERIFIED ANSWERS)|AGRAD
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Original, unencrypted information is referred to as ____. 
A text 
B plaintext 
C cleantext 
D ciphertext 
B 
Which of the following is NOT an asymmetric system? 
A PGP 
B RSA 
C SSL 
D DES 
D 
In order for User A to send User B an encrypted message that only User B can 
read, User A must encrypt message with which of the following keys? 
A User A's public key 
B User A's private key 
C User B's public key 
D User B's private key 
C
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Introduction to Cryptography C839 Practice Exam And Answers Graded A+ 2024.
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Which encryption standard uses the same key to encrypt and decrypt messages? - Answer Symmetric Key Encryption 
 
Which algorithm is designated as a Type 2 product by the National Security Agency (NSA)? - Answer SKIPJACK 
 
What is the most commonly used format for certificates? - Answer X.509 v3 *Version 3* 
 
What is referenced to determine if a certificate has been revoked? - Answer Certificate Revocation List *(CRL)* 
 
What needs to be installed on *end users' computers* to allow t...
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Pre-Assesment - Introduction to Cryptography - C839 – WGU Test Guide Well Answered 100% 2024.
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1. A business wants to use keys issued by a trusted third party to demonstrate to potential customers that it is a legitimate organization. 
Which key is used to sign the certificate issued to the business? 
 
Private key of the root CA 
Public key of the root CA 
Private key of the company 
Public key of the company - Answer Private key of the root CA 
 
2. A business wants to use keys issued by a trusted third party to demonstrate it is a legitimate organization to potential customers. 
Whi...
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WGU C239 Pro Final Exam With Solved Answers 2024.
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An individual has taxable income of $60,000. The first $20,000 is taxed at 20%, the next $20,000 is taxed at 20%, and all income above $40,000 is taxed at 20%.Which tax structure is being applied to the individual's taxable income? 
Base 
Regressive 
Progressive 
Proportional - Answer Proportional 
 
Which federal income tax structure imposes an increasing marginal tax rate as the tax base increases? 
Regressive tax 
Incremental tax 
Progressive tax 
Proportional tax - Answer Progressive 
 ...
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WGU C808 Study Guide Exam With All Correct Answers 2024.
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ICD-0 - Answer International Classification of Diseases for Oncology 
 
ICD-10 Structure - Answer 3-7 numbers, begins with letter, decimal point at position 3 - A56.7241 
 
What number does the section for ICD-10-PCS for osteopathic start with? - Answer 7 
 
Structure of the ICD-10-PCS - Answer 7 alphanumeric characters, Z is place holder 
 
CPT Structure - Answer 5 numerical characters - 12345 
 
what is another name for HCPCS-1? - Answer CPT (exam will refer to HCPCS-1 which is CPT...
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WGU C839 Practice Exam And Answers Graded A+ 2024.
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DES - Answer 64 Bit Block - 56 Bit Key - 16 Rounds 
 
AES - Answer 128 Bit Block - 128, 192, 256 Bit Key - 10, 12, 14 Rounds 
 
BlowFish - Answer 64 Bit Block - 32 thru 448 Bit Key - 16 Rounds 
 
TwoFish - Answer 128 Bit Block - 1 thru 256 Bit Key - 16 Rounds 
 
Serpent - Answer 128 Bit Block 128, 192, 256 Bit Key - 32 Rounds 
 
SkipJack - Answer 64 Bit Block - 80 Bit Key - 32 Rounds 
 
IDEA - Answer 64 Bit Block - 128 Bit Key - 8.5 Rounds 
 
Symmetric Block Ciphers - Answer DES ...
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WGU C839v5/D334 Additional Practice Exam And Complete Answers 2024.
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128 - Answer The hash value in bits for MD5 is ____. 
A. 128 
B. 160 
C. 256 
 
variable; fixed - Answer Hashing involves taking a _____ length input and producing a _____ length output (message digest). 
A. fixed; fixed 
B. variable; fixed 
C. fixed; variable 
 
160 - Answer The hash value in bits for SHA-1 is ____. 
A. 128 
B. 160 
C. 256 
 
128 - Answer The hash value in bits for MD4 is ____. 
A. 128 
B. 160 
C. 256 
 
Transport - Answer IPSec ______ mode involves "end-to-end" enc...
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WGU Course C836 - Fundamentals of Information Security Practice Exam Fully Solved 2024.
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Which cybersecurity term is defined as the potential for an attack on a resource? 
 
A Impact 
B Vulnerability 
C Risk 
D Threat - Answer D 
 
Which security type deliberately exposes a system's vulnerabilities or resources to an attacker? 
 
A Intrusion detection 
B Firewalls 
C Honeypots 
D Intrusion prevention - Answer C 
 
Which tool can be used to map devices on a network, along with their operating system types and versions? 
 
A Packet sniffer 
B Packet filter 
C Port scanner 
D Stat...
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WGU Course C839 Intro to Cryptography Final Exam And Answers Rated A+ 2024.
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What type of encryption uses different keys to encrypt and decrypt the message? 
 
A Symmetric 
B Private key 
C Secure 
D Asymmetric - Answer D 
 
The most widely used asymmetric encryption algorithm is what? 
 
A RSA 
B Vigenere 
C DES 
D Caesar Cipher - Answer A 
 
Original, unencrypted information is referred to as ____. 
 
A text 
B plaintext 
C cleantext 
D ciphertext - Answer B 
 
Which of the following is NOT an asymmetric system? 
 
A PGP
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WGU Introduction to Cryptography C839 Study Guide Exam Fully Solved 2024.
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CrypTool - Answer Software which allows encryption of text using historic algorithms 
 
The Enigma Machine - Answer In World War II the Germans made use of an electro-mechanical rotor based cipher Known as The Enigma Machine. 
 
Allied cipher machines used in WWII included the British TypeX and the American SIGABA. 
 
The ADFGVX Cipher - Answer invented by Colonel Fritz Nebel in 1918. 
The key for this algorithm is a six-by-six square of letters, used to encode a 36-letter alphabet. 
 
The...
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WGU C839- test Questions and Answers Already Passed
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What is the block and key size for Blowfish - 64 bit block 
- 32-448 bit key 
What term from the list below best describes a data concealment for covert communication that 
makes use of LSB replacement? Steganography 
What term from the list below best describes a data concealment for covert communication that 
makes use of LSB replacement? Steganography 
Which block cipher below uses a block size of 128 bits and key sizes up to 256 bits? TwoFish 
Symmetric encryption is expressed mathematically...