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Which of the following request in Session Initiation Protocol (SIP) queries the capabilities of
servers?

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A. CANCEL

B. ACK

C. OPTIONS

D. PRACK

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Correct Answer : C.


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  1. FDDI operates on 100 Mbps.
  2. A time exceeded message is generated if ………………………………………………….
  3. Internet e-mail system based on the ……………………………………………..
  4. Which OSI model layer provides for encryption and decryption of data?
  5. Destination physical address in ARP request is a ………………………….address.
  6. A router receives an IP packet with source IP address 130.45.3.3 and destination IP address 202.23.4.16.…
  7. Which type of BGP message is sent by a system to notify another router of the senders existence?
  8. You wish to install a 100BaseT network. What type of cabling will you use?
  9. 127.0.0.1 address is reserved for internal loopback functions.
  10. Which of the following is used for testing the data-link connection in a PPP network?
  11. Which of the following is required to communicate between two computers?
  12. FDDI operates on 100 Mbps.
  13. In which of the following states after selecting a mailbox, actions can be taken against the mail within…
  14. _______ Domain name corresponds to US military.
  15. What can be used in the place of DNS to resolve host names to IP addresses?
  16. 25 is used by SMTP
  17. What is the maximum frame size of a frame relay?
  18. Where are routing tables placed?
  19. Which of the following protocols is described in RFC 793?
  20. 17. Which of the following use default routes for inter-domain routing?
  21. Which of the following transmission media suffers more from transmission impairment?
  22. Router B receives an update from router A that indicates Net1 is two hops away. The next update from…
  23. If user A wants to send an encrypted message to user B, the plaintext is encrypted with the public key…
  24. Transmission medias are classified into two main categories, which are -------------- and --------------------.
  25. What is the distance limitation of Cat5 UTP?
  26. Which of the following provides control over multimedia sessions?
  27. Which of the following is the IEEE specification for wireless networks?
  28. Which of the following versions will replace IPv4 Internet layer?
  29. What is the IEEE specification for Ethernet?
  30. ________allows receiver to inform sender about the successful receiving of all the segments.

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