Encryption and Decryption is the responsibility of ............... Layer. (A) Physical (B) Network (C) Application (D) Datalink

Encryption and Decryption is the responsibility of ............... Layer. (A) Physical (B) Network (C) Application (D) Datalink
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(C) Application
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Encryption and decryption are functions of which layer? a. transport b. session c. application d. presentation

Description : Encryption and decryption are functions of which layer? a. transport b. session c. application d. presentation

Last Answer : d. presentation

Find the false statement: (A) In Modern Cryptography, symmetric key algorithms use same key both for Encryption and Decryption. (B) The Symmetric cipher DES (Data Encryption Standard) was widely used in the industry for security product. (C) The AES (Advanced Encryption Standard) cryptosystem allows variable key lengths of size 56 bits and 124 bits. (D) Public key algorithms use two different keys for Encryption and Decryption.

Description : Find the false statement: (A) In Modern Cryptography, symmetric key algorithms use same key both for Encryption and Decryption. (B) The Symmetric cipher DES (Data Encryption Standard) was widely used ... and 124 bits. (D) Public key algorithms use two different keys for Encryption and Decryption.

Last Answer : (C) The AES (Advanced Encryption Standard) cryptosystem allows variable key lengths of size 56 bits and 124 bits.

If there are N people in the world and are using secret key encryption/decryption for privacy purpose, then number of secret keys required will be: (A) N (B) (N-1) (C) N(N-1)/2 (D) N(N+1)/2

Description : If there are N people in the world and are using secret key encryption/decryption for privacy purpose, then number of secret keys required will be: (A) N (B) (N-1) (C) N(N-1)/2 (D) N(N+1)/2

Last Answer : (C) N(N-1)/2 

Encoding or scrambling data for transmission across a network is khown as a)Protection b) Detection c) Encryption d) Decryption

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Last Answer : c) Encryption

Encoding or scrambling data for transmission across a network is known as: (A) Decryption (B) Protection (C) Detection (D) Encryption

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In the following list of devices, which device is used in datalink layer? (1) Repeaters (2) Routers (3) Application gateway (4) Bridge

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ICMP is a _________ layer protocol. A) datalink B) transport C) network D) noneof the above

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Which layer of OSI reference model is responsible for decomposition of messages and generation of sequence numbers to ensure correct re-composition from end to end of the network? (A) Physical (B) Data-link (C) Transport (D) Application

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Last Answer : (C) Transport 

In TCP/IP Reference model, the job of ............... layer is to permit hosts to inject packets into any network and travel them independently to the destination. (A) Physical (B) Transport (C) Application (D) Host-to-network

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Last Answer : Answer: Marks to all

Explain encryption and decryption. -Technology

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Which of the following is a useful security mechanism when considering business strategy and IT? a. Encryption b. Decryption c. firewall d. all the above

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Last Answer : d. all the above

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Description : NAT limits the use of ………………….. and ……………… A. encryption, authentication. B. encryption, decryption C. encapsulation, translation D. authentication, verification

Last Answer : A. encryption, authentication.

Transmission media are usually categorized as . a. Guided or Unguided b. Determinate or Indeterminate c. Fixed or Unfixed d. Encryption or Decryption

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Last Answer : a. Guided or Unguided

Symmetric - key cryptography refers to ______methods in which both the sender and receiver share the same key ( or , less commonly, in which their keys are different but related in an easily computable way): a) Encryption b) Decryption c) Both of above d) None of These

Description : Symmetric - key cryptography refers to ______methods in which both the sender and receiver share the same key ( or , less commonly, in which their keys are different but related in an easily computable way): a) Encryption b) Decryption c) Both of above d) None of These

Last Answer : a) Encryption

When the information is reverted back into a useful form it is called: a) Standard encryption b) Plain text encryption c) Decryption d) None of These

Description : When the information is reverted back into a useful form it is called: a) Standard encryption b) Plain text encryption c) Decryption d) None of These

Last Answer : c) Decryption

When information is transformed from a useful form of understanding to an opaque form of understanding, this is called: a) Encryption b) Decryption c) Both of Above d) None of These

Description : When information is transformed from a useful form of understanding to an opaque form of understanding, this is called: a) Encryption b) Decryption c) Both of Above d) None of These

Last Answer : a) Encryption

Symmetric - key cryptography refers to ______methods in which both the sender and receiver share the same key ( or , less commonly, in which their keys are different but related in an easily computable way): a) Encryption b) Decryption c) Both of above d) None of These

Description : Symmetric - key cryptography refers to ______methods in which both the sender and receiver share the same key ( or , less commonly, in which their keys are different but related in an easily computable way): a) Encryption b) Decryption c) Both of above d) None of These

Last Answer : a) Encryption

When the information is reverted back into a useful form it is called: a) Standard encryption b) Plain text encryption c) Decryption d) None of These

Description : When the information is reverted back into a useful form it is called: a) Standard encryption b) Plain text encryption c) Decryption d) None of These

Last Answer : c) Decryption

When information is transformed from a useful form of understanding to an opaque form of understanding, this is called: a) Encryption b) Decryption c) Both of Above d) None of These

Description : When information is transformed from a useful form of understanding to an opaque form of understanding, this is called: a) Encryption b) Decryption c) Both of Above d) None of These

Last Answer : c) Both of Above

The study of encryption is called‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ a. Decryption b. Cryptography c. Firewall d. All the above

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What scrambles the contents of a file so you can't read it without having the right decryption key? a. Encryption b. Intrusion‐detection software c. Security‐auditing software d. All of the above

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Last Answer : a. Encryption

Public key encryption uses multiple keys. One key is used to encrypt data, while another is used to decrypt data. The key used to encrypt data is called the _____ key, while the key used to decrypt data is called the _____ key. a. encryption, decryption b. private, public c. encryption, public d. public, private

Description : Public key encryption uses multiple keys. One key is used to encrypt data, while another is used to decrypt data. The key used to encrypt data is called the _____ key, while the key used to ... the _____ key. a. encryption, decryption b. private, public c. encryption, public d. public, private

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Which of the following is not related to security mechanism a. encryption b. decryption c. e‐cash d. all the above

Description : Which of the following is not related to security mechanism a. encryption b. decryption c. e‐cash d. all the above

Last Answer : c. e‐cash

Which of the following is a useful security mechanism when considering business strategy and IT? a. encryption b. decryption c. firewall d. all the above

Description : Which of the following is a useful security mechanism when considering business strategy and IT? a. encryption b. decryption c. firewall d. all the above

Last Answer : d. all the above

By symmetric key encryption we mean a. one private key is used for both encryption and decryption b. private and public key used are symmetric c. only public keys are used for encryption d. only symmetric key is used for encryption

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On the upper layer of SSL, a protocol for initial authentication and transfer of encryption keys, called the ………………… A) SSL handshake protocol B) SSL authentication protocol C) SSL record protocol D) SSL cipher protocol

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Which of the following are the solutions to network security? i) Encryption ii) Authentication iii) Authorization iv) Non-repudiation A) i, ii and iii only B) ii, iii and iv only C) i, iii and iv only D) All i, ii, iii and iv

Description : Which of the following are the solutions to network security? i) Encryption ii) Authentication iii) Authorization iv) Non-repudiation A) i, ii and iii only B) ii, iii and iv only C) i, iii and iv only D) All i, ii, iii and iv

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_________control inthe datalink layer is based on automatic repeat request, which is the retransmission of data. A) Flow B) Error C) Transmission D) none of the above

Description : _________control inthe datalink layer is based on automatic repeat request, which is the retransmission of data. A) Flow B) Error C) Transmission D) none of the above

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The................. layer is responsible for resolving access to the shared media or resources. A) Physical B) Mac sub layer C) Network D) Transport

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The ……………… layer is responsible for resolving access to the shared media or resources. A) Physical B) Mac sub layer C) Network D) Transpor

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Description : Which layers of the OSI reference model are host-to-host layers ? (A) Transport, Session, Presentation, Application (B) Network, Transport, Session, Presentation (C) Data-link, Network, Transport, Session (D) Physical, Data-link, Network, Transport

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A portion of the Polymorphic virus, generally called a …………………….. , creates, a random encryption, key to encrypt the remainder of the virus. A) mutual engine B) mutation engine C) multiple engine D) polymorphic engine

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The ……………. is used to provide integrity check, authentication and encryption to IP datagram. A) SSL B) ESP C) TSL D) PSL

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………… is to protect data and passwords. A) Encryption B) Authentication C) Authorization D) Non-repudiation

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Which among the following layer' main function is data formats, dataencryption/decryption, data compression/decompression etc:a) Session Layerb) Transport Layerc) Presentation Layerd) None of These

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Transmission media lie below the_______ layer. A) physical B) network C) transport D) application

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Last Answer : physical

The TCP/IP _______ layer is equivalent to the combined session, presentation, and application layers of the OSI model. a.data link b.network c.physical d.application

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Last Answer : d.application

Transport layer aggregates data from different applications into a single stream before passing it to ____________ a. network layer b. data link layer c. application layer d. physical layer

Description : Transport layer aggregates data from different applications into a single stream before passing it to ____________ a. network layer b. data link layer c. application layer d. physical layer

Last Answer : a. network layer

Transport layer aggregates data from different applications into a single stream before passing it to ____________ a. network layer b. data link layer c. application layer d. physical layer

Description : Transport layer aggregates data from different applications into a single stream before passing it to ____________ a. network layer b. data link layer c. application layer d. physical layer

Last Answer : a. network layer

The physical layer translates logical communication requests from the ______ into hardware specific operations. a. data link layer b. network layer c. trasnport layer d. application layer

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Last Answer : a. data link layer

SMTP is a protocol used in which layer? a. Application b. Network c. Physical d. Transport

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Last Answer : a. Application

The purpose of a proxy server is to control exchange of data between the two networks at …………..instead of ……….. A. an application level , an IP level B. network layer, physical layer C. an application layer, physical layer D. Network layer , an application layer

Description : The purpose of a proxy server is to control exchange of data between the two networks at …………..instead of ……….. A. an application level , an IP level B. network layer, physical layer C. an application layer, physical layer D. Network layer , an application layer

Last Answer : A. an application level , an IP level

The _______ layer is the topmost layer in the subnet. A. Network B. application C. transport D. physical

Description : The _______ layer is the topmost layer in the subnet. A. Network B. application C. transport D. physical

Last Answer : A. Network

Transport layer aggregates data from different applications into a single stream before passing it to ____________ A. network layer B. data link layer C. application layer D. physical layer

Description : Transport layer aggregates data from different applications into a single stream before passing it to ____________ A. network layer B. data link layer C. application layer D. physical layer

Last Answer : A. network layer

The data link layer takes the packets from _________ and encapsulates them into frames for transmission. a) network layer b) physical layer c) transport layer d) application layer

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Last Answer : a) network layer

Choose the correct layer numbers and names of the OSI model below. a. Layer 3 - Network Layer, Layer 2 - Data Link Layer, Layer 1 - Physical Layer b. Layer 7 - Application Layer, Layer 6 - Presentation Layer c. Layer 5 - Session Layer, Layer 4 - Transport Layerd. All given options

Description : Choose the correct layer numbers and names of the OSI model below. a. Layer 3 - Network Layer, Layer 2 - Data Link Layer, Layer 1 - Physical Layer b. Layer 7 - Application Layer, Layer 6 - Presentation Layer c. Layer 5 - Session Layer, Layer 4 - Transport Layer d. All given options

Last Answer : d. All given options

TCP/IP layer is equivalent to combined Session, Presentation and a. Transport layer b. Network layer c. Application layer d. Physical layer

Description : TCP/IP layer is equivalent to combined Session, Presentation and a. Transport layer b. Network layer c. Application layer d. Physical layer

Last Answer : c. Application layer

_____________ layer protocols determine how the data is physically sent over the network’s physical layer or medium. A. Application layer B. Transport layer C. Network layer D. Link layer

Description : _____________ layer protocols determine how the data is physically sent over the network’s physical layer or medium. A. Application layer B. Transport layer C. Network layer D. Link layer

Last Answer : D. Link layer