Section 4 Flashcards

1
Q

DKIM (DomainKeys Identified Mail)

A

Adds a digital signature to emails to verify that the content has not been altered and was sent from an authorized domain.

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2
Q

SPF (Sender Policy Framework)

A

Specifies which mail servers are authorized to send emails on behalf of a domain by checking the sending server’s IP address.

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3
Q

DMARC (Domain-based Authentication, Reporting & Conformance)

A

Determines the disposition of emails (accept, quarantine, or reject) based on SPF and DKIM results.

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4
Q

TCP (Transmission Control Protocol)

A
  • Connection-oriented
  • Reliable delivery with error-checking and retransmission
  • Sequencing of data
  • Slower due to overhead
  • Used for applications where reliability is crucial (e.g., HTTP, FTP, email)
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5
Q

UDP (User Datagram Protocol)

A
  • Connectionless
  • Unreliable delivery, no error-checking
  • No sequencing or flow control
  • Faster due to lower overhead
  • Used for applications where speed is more important than reliability (e.g., streaming, VoIP, DNS)
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6
Q

What are common TCP ports?

A
  • 80 - HTTP
  • 443 - HTTPS
  • 25 - SMTP
  • 23 - Telnet
  • 22 - SSH
  • 20/21 - FTP
  • 110 - POP3
  • 143 - IMAP
  • 3389 - RDP
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7
Q

Deauthentication

A

A type of Denial-of-Service (DoS) attack targeting Wi-Fi networks. It involves sending spoofed deauthentication frames to disconnect a device from the network. This disrupts connectivity and can be used as a precursor to other attacks, like setting up a rogue access point. Mitigation includes using WPA3, 802.11w (management frame protection), and monitoring the network for unauthorized activity.

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