Which of the following is the port used by SMTP?

A. 21

B. 23

C. 25

D. 80

Please do not use chat terms. Example: avoid using "grt" instead of "great".

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  1. Using a class B address maximum of …………………networks can be…
  2. Which function is not supported by E-mail?
  3. What is the pattern of a preamble?
  4. How many layers are there in the OSI model?
  5. You are browsing www.microsoft.com on a machine named host.contoso.org.. What is the order of domain…
  6. Your network has gotten a single class C address but has 300 computers. How can you connect them to…
  7. Which cable type is immune to outside interference and crosstalk?
  8. ________allows receiver to inform sender about the successful receiving of all the segments.
  9. Which of the following transmission media suffers more from transmission impairment?
  10. FTP servers by default listen on port ________ for incoming connections from FTP clients.
  11. E-mail is an example of ………………………… mode…
  12. Which of the following is used for establishing, configuring, and testing the data-link Link Control…
  13. The idea of sharing one network address among the multiple physical networks can be done using the following…
  14. Which of the following delivery methods works with only one source and one destination? Multicast
  15. Internet Research Task Force (IRTF) body looks after ________.
  16. Which of the following is the IEEE specification for wireless networks?
  17. Where are routing tables placed?
  18. _______ Domain name corresponds to US military.
  19. The Point-to-Point Protocol (PPP) is described in which of the following?
  20. You're asked to install a Citrix MetaFrame XP server. What protocol will clients use to connect and…
  21. In FTP, to execute a file transfer, the user begins by _________.
  22. Your Web server is also configured as an FTP server. What part of the data packet will tell the server…
  23. 80 is the well-known port number for the HTTP service.
  24. ________acts as source and destination for IP traffic.
  25. You are browsing www.microsoft.com on a machine named host.contoso.org.. What is the order of domain…
  26. Which class does the IP address belong to?
  27. Which class of IP addressing was not brought in much use?
  28. preamble field of 802.3 frames is encoded using ------------------- encoding
  29. In an authentication using symmetric keys, if 10 people need to communicate, we need _______ keys.
  30. Select the standard for token ring using token-passing media access.