QUESTION: 81

Customers have called complaining that their VoIP call quality has suffered. You suspect a problem with your routers. Which of the following will most likely help you determine the specific cause of the problem?

Checking interface usage statistics.
Determining number of packets sent out of sequence.
Determining frequency of routing table updates.
Checking the Access Control List (ACL) of the primary router.

Answer(s): A

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QUESTION: 82

Which of the following describes how the host portion of IPv4 and IPv6 addresses are created?

The host portion of an IPv4 address is determined arbitrarily according to the value of the subnet mask. The host portion of an IPv6 address is determined from the host's MAC address.
All IPv4 and IPv6 host addresses are based on the host's MAC address.
All IPv4 and IpvS host addresses are determined by ICANN.
The host portion of an IPv4 address is determined by ICANN. The host portion of an IPv6 address is determined according to the multicast address.

Answer(s): A

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QUESTION: 83

Consider the following entry:

JORIGIN 7.7.0.0.5.7.2.2.0.6.1.e164.arpa.IN NAPTR 102 10 "u" "sip+E2U"
"!^.*$!sip: marketing@voip.ctpcertified.comli".

From the information given above, what is the purpose of this entry?

It routes a PSTN phone number to a SIP-enabled device.
Calls will be received on a system that uses IPv6.
The PBX will act as a backup to the SIP proxy for a call.
It translates calls into e-mail and routed to the marketing department.

Answer(s): A

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QUESTION: 84

According to the T.30 ITU-T standard, how many phases exist in a fax transmission?

Three
Six
Five
Four

Answer(s): C

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QUESTION: 84

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