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Questions and Answers
What is the primary function of a network?
What is the primary function of a network?
- To isolate devices from each other.
- To prevent any unauthorized access to devices.
- To limit the amount of data transferred between devices.
- To connect two or more devices for communication. (correct)
Which of the following terms describes a vulnerability where data can be secretly listened to?
Which of the following terms describes a vulnerability where data can be secretly listened to?
- Wiretapping (correct)
- Modification
- Addressing
- Fabrication
What is a common vulnerability associated with wireless networks?
What is a common vulnerability associated with wireless networks?
- Interception (correct)
- Cable splicing
- Inductance
- Physical cable cuts
What does 'MAC' stand for in the context of network transmission media?
What does 'MAC' stand for in the context of network transmission media?
Which type of network transmission is NOT susceptible to inductive tapping?
Which type of network transmission is NOT susceptible to inductive tapping?
What is the term for examining each packet as it goes by on a network?
What is the term for examining each packet as it goes by on a network?
What type of attack attempts to make a service unavailable to legitimate users?
What type of attack attempts to make a service unavailable to legitimate users?
What is a 'frame' in the context of Wi-Fi networks?
What is a 'frame' in the context of Wi-Fi networks?
What is the purpose of link encryption?
What is the purpose of link encryption?
Which authentication mechanism is designed for client-server applications and uses a Key Distribution Center (KDC)?
Which authentication mechanism is designed for client-server applications and uses a Key Distribution Center (KDC)?
A network requires more than two devices connected by hardware and software.
A network requires more than two devices connected by hardware and software.
Data communications are only vulnerable when transmitted wirelessly.
Data communications are only vulnerable when transmitted wirelessly.
Cable splicing involves an attacker cutting and splicing a secondary cable to receive a copy of data.
Cable splicing involves an attacker cutting and splicing a secondary cable to receive a copy of data.
Optical fibers are easily tapped without detection.
Optical fibers are easily tapped without detection.
A MAC address is a unique physical address assigned to a router.
A MAC address is a unique physical address assigned to a router.
Analyzing a file can only involve one host before reaching its destination.
Analyzing a file can only involve one host before reaching its destination.
A replay attack involves legitimate data being intercepted and replayed.
A replay attack involves legitimate data being intercepted and replayed.
A 'SYN' flood is where the attacker overwhelms victims by filling their SYN_SEND
queue.
A 'SYN' flood is where the attacker overwhelms victims by filling their SYN_SEND
queue.
In the context of networks, 'inductance' refers to the process of reading signals an intruder can read through wire radiation.
In the context of networks, 'inductance' refers to the process of reading signals an intruder can read through wire radiation.
Kerberos requires a continuous availability of a non-trusted ticket granting server.
Kerberos requires a continuous availability of a non-trusted ticket granting server.
Which of the following represents a significant security risk associated with wireless communication compared to wired networks?
Which of the following represents a significant security risk associated with wireless communication compared to wired networks?
In the context of network security, which of the following describes a 'sequencing attack'?
In the context of network security, which of the following describes a 'sequencing attack'?
What is the primary purpose of a 'SYN flood' attack in the context of network security?
What is the primary purpose of a 'SYN flood' attack in the context of network security?
Which of the listed options describes the purpose of 'traffic redirection' as a network attack?
Which of the listed options describes the purpose of 'traffic redirection' as a network attack?
Why is 'anonymity' a significant security concern in network environments?
Why is 'anonymity' a significant security concern in network environments?
Which statement explains why 'Inductance' can be a security vulnerability in network transmission media?
Which statement explains why 'Inductance' can be a security vulnerability in network transmission media?
Which of the following is a key characteristic of a 'Smurf attack'?
Which of the following is a key characteristic of a 'Smurf attack'?
What is a primary security advantage of using optical fiber for network communication?
What is a primary security advantage of using optical fiber for network communication?
What is the main purpose of link encryption in network security?
What is the main purpose of link encryption in network security?
What is a significant limitation of Kerberos in distributed systems?
What is a significant limitation of Kerberos in distributed systems?
In a network, inductance is a process where an intruder must make physical contact with the cable to tap a wire.
In a network, inductance is a process where an intruder must make physical contact with the cable to tap a wire.
An attacker employing a substitution attack inserts additional data values into a data stream, disrupting its integrity.
An attacker employing a substitution attack inserts additional data values into a data stream, disrupting its integrity.
Optical fiber's immunity to wiretapping is primarily due to its use of light energy, which prevents emanations detectable through inductance.
Optical fiber's immunity to wiretapping is primarily due to its use of light energy, which prevents emanations detectable through inductance.
A physical replay attack involves intercepting and reusing legitimate data packets without any modification.
A physical replay attack involves intercepting and reusing legitimate data packets without any modification.
In a SYN flood DoS attack, the attacker's true identity is easily traceable due to the nature of TCP connection establishment.
In a SYN flood DoS attack, the attacker's true identity is easily traceable due to the nature of TCP connection establishment.
The SESAME protocol in distributed systems relies exclusively on symmetric-key cryptography for secure communications.
The SESAME protocol in distributed systems relies exclusively on symmetric-key cryptography for secure communications.
In wireless networks, the SSID hides a wireless access point.
In wireless networks, the SSID hides a wireless access point.
In the context of network security, intercepting communications is only a minor threat compared to integrity and availability threats.
In the context of network security, intercepting communications is only a minor threat compared to integrity and availability threats.
The primary advantage of link encryption over end-to-end encryption is that it permits users to selectively encrypt individual messages based on their sensitivity.
The primary advantage of link encryption over end-to-end encryption is that it permits users to selectively encrypt individual messages based on their sensitivity.
Kerberos is designed to withstand attacks in distributed environments, however, it operates effectively even without continual availability of a trusted ticket granting server (KDC).
Kerberos is designed to withstand attacks in distributed environments, however, it operates effectively even without continual availability of a trusted ticket granting server (KDC).
Flashcards
Network
Network
Two devices connected by hardware and software enabling communication.
Cable Vulnerability
Cable Vulnerability
Signals in Ethernet or LAN vulnerable to interception.
Packet Sniffing
Packet Sniffing
Examining each data packet as it goes by, often using tools like Wireshark.
Radiation Threat
Radiation Threat
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Cable Splicing
Cable Splicing
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Data Communications Vulnerability
Data Communications Vulnerability
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Protocol
Protocol
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Substitution Attack
Substitution Attack
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Replay Attack
Replay Attack
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Denial of Service (DoS)
Denial of Service (DoS)
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MAC Address
MAC Address
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Radiation
Radiation
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Port
Port
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Sequencing attack
Sequencing attack
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Insertion attack
Insertion attack
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SYN flood
SYN flood
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DDoS Attack
DDoS Attack
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Wiretapping
Wiretapping
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Data Interception
Data Interception
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Microwave Communication :
Microwave Communication :
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Satellite communication
Satellite communication
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Addressing on a network
Addressing on a network
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Routing
Routing
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SSID
SSID
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Flooding Attack
Flooding Attack
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IP Fragmentation: Teardrop
IP Fragmentation: Teardrop
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Traffic Redirection
Traffic Redirection
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Optical Fiber Security
Optical Fiber Security
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Microwave Weakness
Microwave Weakness
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Interruption Threat
Interruption Threat
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Network Impersonation
Network Impersonation
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Denial of Service
Denial of Service
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Link Encryption
Link Encryption
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End-to-End Encryption
End-to-End Encryption
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Kerberos
Kerberos
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Message Confidentiality
Message Confidentiality
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Optical Fiber Weakness
Optical Fiber Weakness
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Message Integrity Violation
Message Integrity Violation
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Study Notes
- Cable signals in Ethernet or other LAN are vulnerable to interception
- Each LAN connector has a MAC address
- Packet sniffing examines each packet as it goes by, using Wireshark for example
- Wires radiate signals, and an intruder can read through inductance
- Cable splicing involves an attacker cutting and splicing in a secondary cable to receive copy of data
- Optical fiber cannot be tapped without being detected
- Optical fiber is not subject to inductive tap
- Microwave broadcasts through the air, making it more accessible to outsiders
- Satellite Communication's wide broadcast footprint allows any antenna in range to obtain the signal without being detected
- Other radio wave technologies comprise cellular, Bluetooth, and near-field communication
Authentication Issues in Distributed System
- Kerberos is designed to withstand attacks, including no password transmitted on the network
- Cryptographic protection against spoofing
- Limited period of validity
- Timestamps to prevent replay attacks
- Mutual authentication
- Kerberos is not perfect because it requires continuous availability of a trusted ticket granting server, or KDC - Servers authenticity needs a trusted relationship between the ticket granting server and every server - Kerberos requires timely transactions - A subverted workstation could save and replay passwords
- Kerberos was designed at MIT
- The basis of Kerberos is a central server that provides authenticated tokens called tickets to requesting application
- Password guessing attacks can still be effective if weak passwords are used in Kerberos
- Kerberos may not scale well in large or highly dynamic environments due to overhead of TGTs and KDCs
- Kerberos provides authentication and encryption but might not address all security concerns like secure authorization or DoS
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