Which of the following is the port used by SMTP?

A. 21

B. 23

C. 25

D. 80

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  2. Which of these cable is/are used to connect devices to hubs and switches.
  3. Which of the following connectors is used by UTP on a Fast Ethernet network?
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  5. How many 64-Kbps channels are used on an ISDN BRI?
  6. Which of the following is the port used by SMTP?
  7. 17. Which of the following use default routes for inter-domain routing?
  8. A network's Internet connection uses a 128-Kbps Basic Rate Interface (BRI). What type of connection…
  9. Which of the following is currently a de facto standard, commonly used for point-to-point serial connections…
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  11. What is the range of multicast addressing?
  12. Twisted-pair cable uses what type of connector?
  13. In which of the following states after selecting a mailbox, actions can be taken against the mail within…
  14. Which of the following is a media type that is most susceptible to interference?
  15. What is the default port for Telnet?
  16. UDP datagram has a header, which is of ________.
  17. What can be used in the place of DNS to resolve host names to IP addresses?
  18. Which of the following is the IEEE specification for wireless networks?
  19. What is attenuation?
  20. A modem is a card within a PC that converts the …………... the computer produces…
  21. Which of the following SIP request terminates a call?
  22. ___________ is based on resources that are present within the Diffserv region.
  23. Pure ALOHA has a maximum throughput of -----------
  24. The worldwide Internet is a well-known example of ------------------.
  25. Which of the following can provide a backbone network of 600 meters in length without using repeaters?
  26. Which of the following provides the service for any casting?
  27. You have a network card with the connector in question 43, and it also has a 15 pin female connector,…
  28. The Point-to-Point Protocol (PPP) is described in which of the following?
  29. SMTP protocol is responsible for sending email across the Internet
  30. At which layer of the OSI model do FTP, SMTP, POP3, and HTTP function?