Podcast
Questions and Answers
What is the term for redirecting victims to a malicious site by corrupting name resolution?
What is the term for redirecting victims to a malicious site by corrupting name resolution?
Which protocol enables clients to request files from a server on port 80?
Which protocol enables clients to request files from a server on port 80?
What is the purpose of SSL/TLS accelerators?
What is the purpose of SSL/TLS accelerators?
Which approach assigns concrete values to risk factor likelihood and impact?
Which approach assigns concrete values to risk factor likelihood and impact?
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What term describes the period that a function can be unavailable?
What term describes the period that a function can be unavailable?
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Which of the following is used for authentication and key exchange in a secure communications context?
Which of the following is used for authentication and key exchange in a secure communications context?
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What describes the method of keeping data private while transiting a public network?
What describes the method of keeping data private while transiting a public network?
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What describes a situation where a company takes over a domain name that is similar to its own?
What describes a situation where a company takes over a domain name that is similar to its own?
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Study Notes
Domain Name System (DNS) Security
- Resolves host names and domain labels to IP addresses
- DNS server cache poisoning exploits weak transaction ID generation in DNS servers to spoof responses to queries
- Pharming redirects victims to a malicious site by corrupting name resolution
- Cybersquatting involves taking over a company’s legitimate domain
- Typosquatting registers domains that are very similar to the victim domain
Secure Communications
- Hyper Text Transport Protocol (HTTP) enables clients to request files from a server on port 80
- Secure Sockets Layer/Transport Layer Security (SSL/TLS) is a protocol used with TCP applications (notably HTTPS over port 443)
- PKI digital certificates are used to identify a host during authentication
- SSL/TLS accelerators offload cryptographic calculations to a dedicated processor.
- SSH FTP (SFTP) runs FTP over SSH on port 22
Risk Management
- Maximum Tolerable Downtime (MTD) is the period during which a function can be unavailable
- Recovery Time Objective (RTO) is the time taken to bring a system back online
- Risk mitigation is the process of reducing exposure to or the effects of risk factors
- A quantitative approach assigns concrete values to risk factor likelihood and impact
Virtual Private Network (VPN)
- A VPN creates a secure tunnel to keep data private when transiting the public network
- Site-to-site VPN connects two private networks by VPN routers across the Internet
- Internet Protocol Security (IPSec) provides network-layer security that is application-independent
- Tunnel mode encrypts the original IP header and replaces it with another
- Internet Key Exchange (IKE) handles authentication and key exchange/agreement (Security Associations)
- VPN concentrators are positioned at the network edge, protected by firewall/DMZ configuration
- Split tunnel allows the client to access the Internet directly using its native IP configuration and DNS servers
Other Key Concepts
- Secure Shell (SSH) enables remote administration with public key cryptography security
- Simple Mail Transfer Protocol (SMTP) is used to route mail between servers
- A media gateway allows VoIP calls to be placed to the telephone network
- Sites can be categorized as hot, warm, or cold
- Rogue Virtual Machines (VMs) are a result of system sprawl and undocumented assets
- Cloud computing is an IT infrastructure that provides on-demand resources over the network/Internet
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Description
Test your knowledge on the intricacies of DNS security, secure communication protocols, and risk management strategies. Explore topics such as DNS server vulnerabilities, SSL/TLS usage, and risk assessment measures in this comprehensive quiz.
