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294. Which of the following improve security of an IP Telephony solution from common threats? (Select TWO)

A. Implement Access Control Lists (ACL) at the access switches and distribution switches.

292. Which of the following is known as the public address of a SIP user?

A. IP address

289. A company is considering merging two stand alone IP-PBXs into a single centralized system.  Which of the following are advantages of consolidating these systems?

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285. Which of the following statements is true about SIP security standards?

283. Which of the following video formats would a technician expect to be running at 30 Fps?

281. Which of the following video formats would a technician expect to contain 625 horizontal lines that are each transmitted 25 times per second? (Select TWO)

279. Which of the following video compression standards would a technician expect to find being used according to the H. 323 standard? (Select TWO)

277. Which of the following layers of the OSI model does the 802.1p standard operate?

275. Which of the following servers performs SIP requests on behalf of the client, and message translation on a per-needed basis for messaging and network security?