QuestionQ399

Concepts of TCP/IP and the Link Layer

Which of these ports can be used for IP spoofing?

  • A NNTP 119
  • B POP 110
  • C Rlogin 513
  • D Whois 43
Explanation

Rlogin uses TCP port 513 and historically relies on host-based authentication, making it susceptible to attacks that spoof a trusted source IP address.

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