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NEW QUESTION: 1
Secure Sockets Layer (SSL) uses a Message Authentication Code (MAC) for what purpose?
A. message integrity.
B. message confidentiality.
C. message interleave checking.
D. message non-repudiation.
Answer: A
Explanation:
A keyed hash also called a MAC (message authentication code) is used for integrity protection and authenticity.
In cryptography, a message authentication code (MAC) is a generated value used to authenticate a message. A MAC can be generated by HMAC or CBC-MAC methods. The MAC protects both a message's integrity (by ensuring that a different MAC will be produced if the message has changed) as well as its authenticity, because only someone who knows the secret key could have modified the message.
MACs differ from digital signatures as MAC values are both generated and verified using the same secret key. This implies that the sender and receiver of a message must agree on the same key before initiating communications, as is the case with symmetric encryption. For the same reason, MACs do not provide the property of non-repudiation offered by signatures specifically in the case of a network-wide shared secret key: any user who can verify a MAC is also capable of generating MACs for other messages.
HMAC When using HMAC the symmetric key of the sender would be concatenated (added at the end) with the message. The result of this process (message + secret key) would be put through a hashing algorithm, and the result would be a MAC value. This MAC value is then appended to the message being sent. If an enemy were to intercept this message and modify it, he would not have the necessary symmetric key to create a valid MAC value. The receiver would detect the tampering because the MAC value would not be valid on the receiving side.
CBC-MAC If a CBC-MAC is being used, the message is encrypted with a symmetric block cipher in CBC mode, and the output of the final block of ciphertext is used as the MAC. The sender does not send the encrypted version of the message, but instead sends the plaintext version and the MAC attached to the message. The receiver receives the plaintext message and encrypts it with the same symmetric block cipher in CBC mode and calculates an independent MAC value. The receiver compares the new MAC value with the MAC value sent with the message. This method does not use a hashing algorithm as does HMAC.
Cipher-Based Message Authentication Code (CMAC) Some security issues with CBC-MAC were found and they created Cipher-Based Message Authentication Code (CMAC) as a replacement. CMAC provides the same type of data origin authentication and integrity as CBC-MAC, but is more secure mathematically. CMAC is a variation of CBC-MAC. It is approved to work with AES and Triple DES. HMAC, CBC-
MAC, and CMAC work higher in the network stack and can identify not only transmission
errors (accidental), but also more nefarious modifications, as in an attacker messing with a
message for her own benefit. This means all of these technologies can identify intentional,
unauthorized modifications and accidental changes- three in one.
The following are all incorrect answers:
"Message non-repudiation" is incorrect.
Nonrepudiation is the assurance that someone cannot deny something. Typically,
nonrepudiation refers to the ability to ensure that a party to a contract or a communication
cannot deny the authenticity of their signature on a document or the sending of a message
that they originated.
To repudiate means to deny. For many years, authorities have sought to make repudiation
impossible in some situations. You might send registered mail, for example, so the
recipient cannot deny that a letter was delivered. Similarly, a legal document typically
requires witnesses to signing so that the person who signs cannot deny having done so.
On the Internet, a digital signature is used not only to ensure that a message or document
has been electronically signed by the person that purported to sign the document, but also,
since a digital signature can only be created by one person, to ensure that a person cannot
later deny that they furnished the signature.
"Message confidentiality" is incorrect. The Message confidentiality is protected by
encryption not by hashing algorithms.
"Message interleave checking" is incorrect. This is a nonsense term included as a
distractor.
Reference(s) used for this question:
Harris, Shon (2012-10-25). CISSP All-in-One Exam Guide, 6th Edition (p. 1384). McGraw-
Hill. Kindle Edition.
and
http://csrc.nist.gov/publications/nistpubs/800-38B/SP_800-38B.pdf
and
http://searchsecurity.techtarget.com/definition/nonrepudiation
and
https://en.wikipedia.org/wiki/Message_authentication_code

NEW QUESTION: 2
Which Inventorytable storesreservations Information generated for salesorders?
A. OE_OBDER_LINES_ALL
B. MTL_DEMAND
C. MTL_GENRRIC DISPOSITIONS
D. MTL_SALES_ORDERS
Answer: B
Explanation:
Explanation/Reference:
Explanation:

NEW QUESTION: 3
HPE Synergyプラットフォーム用に構成されたネットワークの帯域幅と可用性を向上させるために、お客様は2つのVirtual Connect相互接続からアップリンクポートを集約する必要があります。
お客様のニーズを満たすために、インテグレーターは構成でどのステップを実行する必要がありますか？
A. Virtual ConnectモジュールでIntelligent Resilient Fabric（IRF）を有効にする
B. マスター相互接続モジュール（ICM）のポートQ7とQ8を接続します
C. ポートL1およびL4を使用してサテライトモジュールを接続します
D. 冗長フレームリンクモジュールと2番目の管理リングをインストールします
Answer: C

NEW QUESTION: 4
You plan to create a new Azure Active Directory (Azure AD) role.
You need to ensure that the new role can view all the resources in the Azure subscription and issue support requests to Microsoft. The solution must use the principle of least privilege.
How should you complete the JSON definition? To answer, select the appropriate options in the answer area.
NOTE:Each correct selection is worth one point.

Answer:
Explanation:

Explanation

Box 1: "*/read",
*/read lets you view everything, but not make any changes.
Box 2: " Microsoft.Support/*"
The action Microsoft.Support/* enables creating and management of support tickets.
References:
https://docs.microsoft.com/en-us/azure/role-based-access-control/tutorial-custom-role-powershell
https://docs.microsoft.com/en-us/azure/role-based-access-control/built-in-roles