Network Security Concepts and Attacks

The video tutorial covers network traffic flow between clients and servers, highlighting the risks of replay attacks where attackers capture and reuse information. It explains the 'pass the hash' attack, where attackers capture hashed passwords to gain unauthorized access. The tutorial also discusses browser cookies and session hijacking, where attackers exploit session IDs to impersonate users. Preventive measures like encryption, HTTPS, and VPNs are recommended to secure data and prevent unauthorized access.

What is a common flow of network traffic?

• From client to server and back

• From server to client only

• From server to server

• From client to client

What is a replay attack?

• An attack that deletes data

• An attack that encrypts data

• An attack that intercepts and reuses data

• An attack that modifies data in transit

Which technique is NOT used to perform a replay attack?

• Data encryption

• Network tap

• ARP poisoning

• Malware installation

What does 'pass the hash' refer to?

• Passing a message

• Using a password hash for authentication

• Encrypting a password

• Hashing a file

How can encryption prevent replay attacks?

• By increasing data size

• By slowing down the network

• By making data unreadable to attackers

• By changing the data format

What is a browser cookie?

• A type of virus

• A network protocol

• A file storing website information

• A malicious file

What information in cookies is valuable to attackers?

• Session ID

• Operating system

• IP address

• Browser history

What is session hijacking?

• Intercepting and using a session ID

• Creating a new session

• Deleting a session

• Encrypting a session

Which tool is NOT used for packet capture?

• Kismet

• Scapey

• Wireshark

• FireSheep

How can session hijacking be prevented?

• By using HTTP

• By encrypting data

• By disabling cookies

• By using a proxy