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Which of the following is the port used by SMTP?

A. 21

B. 23

C. 25

D. 80

Correct Answer : C.


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  2. ________is a multicast extension to OSPF Version 2.
  3. How many number of host/machine can be attached to a network using a class B address?
  4. Which OSI model layer provides for encryption and decryption of data?
  5. Following are the advantages of tree topologyi) Point-to-point wiring for individual segments.ii) Supported…
  6. Which of the following is the port used by SMTP?
  7. BGP is …………………………………….routing…
  8. Which of the following provides control over multimedia sessions?
  9. A network's Internet connection uses a 128-Kbps Basic Rate Interface (BRI). What type of connection…
  10. Which of the following can provide a backbone network of 600 meters in length without using repeaters?
  11. Which of the following protocol was developed to overcome limitations of Routing Information Protocol…
  12. Which of the following is the port used by SMTP?
  13. Which layer of the OSI model does a switch operate in?
  14. 127.0.0.1 address is reserved for internal loopback functions.
  15. Which of the following provides a structure for conveying message through TCP/IP network to host?
  16. Select the class C IP address from the following:
  17. How many layers are there in the OSI model?
  18. UDP datagram has a header, which is of ________.
  19. What is the maximum length of thinnet cable before a signal booster is needed?
  20. What can be used in the place of DNS to resolve host names to IP addresses?
  21. Which of the following is a media type that is most susceptible to interference?
  22. TCP protocol is responsible for logical addressing and delivery of packets.
  23. _______ body looks after the protocol identifiers used over Internet.
  24. Which of the following can translate between dissimilar protocols and network types?
  25. Which of the following application uses 1.5 Mbps bandwidth?
  26. A router receives an IP packet with source IP address 130.45.3.3 and destination IP address 202.23.4.16.…
  27. Which of the following is the IEEE specification for wireless networks?
  28. What is the maximum distance of single-mode fiber (SMF)?
  29. You wish to install a 100BaseT network. What type of cabling will you use?
  30. The packet transmit using standard Internet Protocol(IP) throughout the Internet by