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Questions and Answers
Which method helps detect and prevent DDoS attacks by inspecting packets?
Which method helps detect and prevent DDoS attacks by inspecting packets?
A SYN flood attack involves the initiating host sending the final acknowledgment packet.
A SYN flood attack involves the initiating host sending the final acknowledgment packet.
False
What is the primary purpose of an EDI audit trail?
What is the primary purpose of an EDI audit trail?
To maintain a control log of transactions
The technique used to ensure a message sequence cannot be deleted, reordered, or duplicated is called ______.
The technique used to ensure a message sequence cannot be deleted, reordered, or duplicated is called ______.
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Which encryption method is computationally intensive and typically used alongside DES in a digital envelope?
Which encryption method is computationally intensive and typically used alongside DES in a digital envelope?
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Triple-DES encryption provides less security than standard Data Encryption Standard (DES).
Triple-DES encryption provides less security than standard Data Encryption Standard (DES).
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Match the following encryption methods with their descriptions:
Match the following encryption methods with their descriptions:
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Echo checks are used to compare the returned message with the ______ to detect errors.
Echo checks are used to compare the returned message with the ______ to detect errors.
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Which type of firewall provides a higher level of customizable network security?
Which type of firewall provides a higher level of customizable network security?
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A firewall breach attack is a common type of Denial of Service attack.
A firewall breach attack is a common type of Denial of Service attack.
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What is the primary function of a digital certificate?
What is the primary function of a digital certificate?
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The method of encryption that uses two different keys for encoding and decoding is called ______.
The method of encryption that uses two different keys for encoding and decoding is called ______.
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Which of the following is not a type of Denial of Service (DoS) attack?
Which of the following is not a type of Denial of Service (DoS) attack?
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Which encryption technique uses a 128-bit encryption standard?
Which encryption technique uses a 128-bit encryption standard?
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Match the following encryption methods with their characteristics:
Match the following encryption methods with their characteristics:
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A callback device in network security is used to monitor network traffic.
A callback device in network security is used to monitor network traffic.
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Which encryption standard uses a single key known to both sender and receiver?
Which encryption standard uses a single key known to both sender and receiver?
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Digital certificates are used to encrypt messages in the EDI system.
Digital certificates are used to encrypt messages in the EDI system.
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What is the term for the technique that uses both DES and RSA encryption methods together?
What is the term for the technique that uses both DES and RSA encryption methods together?
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A network security feature that verifies the identity of the caller is known as a ______.
A network security feature that verifies the identity of the caller is known as a ______.
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Match the following firewall types with their descriptions:
Match the following firewall types with their descriptions:
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Which method allows users to encrypt data with the speed of secret key encryption and the security of public key encryption?
Which method allows users to encrypt data with the speed of secret key encryption and the security of public key encryption?
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A Smurf attack uses the victim's IP address to send echo responses to other devices.
A Smurf attack uses the victim's IP address to send echo responses to other devices.
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Name the tool that hackers can use to flood a network with messages using a forged IP address.
Name the tool that hackers can use to flood a network with messages using a forged IP address.
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Study Notes
Firewalls
- Application-level firewalls provide the highest level of customizable network security.
- Network-level firewalls use a screening router to examine source and destination addresses.
Data Loss
- Equipment noise is a common cause of data loss in network communications.
Encryption
- Public key encryption uses two different keys for encoding and decoding.
- AES (Advanced Encryption Standard) uses a 128-bit encryption standard.
- Triple-DES enhances DES for better security.
- Digital Envelope uses both DES and RSA encryption methods.
- RSA is computationally intensive and used alongside DES in a digital envelope.
Authentication
- Digital certificates authenticate sender identity.
- Callback devices authenticate users by reconnecting after verifying identity.
Denial of Service (DoS)
- SYN flood attacks involve the initiating host not sending the final acknowledgment packet.
- Smurf attacks flood a network with messages using a forged IP address.
- Distributed DoS (DDoS) attacks are a type of DoS attack.
- Deep Packet Inspection (DPI) helps detect and prevent DDoS attacks by inspecting packets.
Other
- Three-way handshake involves sending these packets: SYN, SYN-ACK, ACK.
- Line errors are the most common issue leading to message corruption.
- Message Transaction Log logs each message with user ID, access time, and terminal location.
- Parity check adds an extra bit to ensure data integrity during transmission.
- Message Sequence Numbering ensures that a message sequence cannot be deleted, reordered, or duplicated during transmission.
- EDI audit trail maintains a control log of transactions.
- Echo check compares the returned message with the original to detect errors.
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Description
This quiz covers essential concepts related to network security, including firewalls, data loss, encryption methods, authentication techniques, and denial of service attacks. Test your knowledge on application-level and network-level firewalls, encryption standards like AES, Digital Certificates, and DoS attacks.
