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Cisco® 210-060 Exam Practice Questions (P. 3)

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Question #21
Which three characteristics are associated with voice? (Choose three.)
  1. A
    Greedy
  2. B
    TCP retransmits
  3. C
    UDP priority
  4. D
    Delay sensitive
  5. E
    Drop insensitive
  6. F
    Benign
  7. G
    Benign or greedy

Correct Answer:
CDF

Question #22
Which type of packet-oriented network has the characteristic of being drop-tolerant and delay-insensitive?
  1. A
    Data
  2. B
    Voice
  3. C
    Video
  4. D
    Converged
  5. E
    All packet-oriented networks share these characteristics.

Correct Answer:
A

Question #23
Which service allows the network to provide better or special services to a set of users and applications at the expense of other users and applications?
  1. A
    QoS
  2. B
    Dial plans
  3. C
    Route patterns
  4. D
    Dial peers

Correct Answer:
A

Question #24
What is the maximum amount of packet loss an engineer should allow for voice traffic on an IP network?
  1. A
    5 percent
  2. B
    2 percent
  3. C
    3 percent
  4. D
    1 percent

Correct Answer:
A

Question #25
A Cisco IP phone is connected to a Cisco switch and is trying to obtain its network configuration. What is the first protocol that is used?
  1. A
    RTP
  2. B
    DHCP
  3. C
    CDP
  4. D
    SIP C

Correct Answer:
Explanation

Question #26
A company has 50 employees and all have Cisco IP phones. One employee notices high latency (more than 250 ms one way) on the IP network. How might this latency impact the employees when they try to make an outgoing phone call?
  1. A
    The voice quality cuts in and out
  2. B
    The call fails with a busy signal
  3. C
    The voice quality sounds like it is under water
  4. D
    The conversation has delays and interruptions

Correct Answer:
D

Question #27
Which protocol is used to supply collaboration devices which can be used to monitor active voice call quality?
  1. A
    STP
  2. B
    SDP
  3. C
    QoS
  4. D
    RTCP
  5. E
    RTP

Correct Answer:
D

Question #28
Which three pieces of information are provided to the Cisco phone by the DHCP server after a reset has been initiated? (Choose three.)
  1. A
    default gateway
  2. B
    dial tone
  3. C
    ARP table
  4. D
    SIP proxy server
  5. E
    IP address
  6. F
    TFTP servers

Correct Answer:
AEF
The DHCP response contains the phone IP address and the IP address of the TFTP server (which is usually a Cisco CallManager server). The response can also contain any of or all these common options:
✑ IP address of the default router (gateway)
✑ IP address of the Domain Name System (DNS) server
✑ Domain name
Reference:
https://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-ip-phone-7900-series/5710-phone-reg.html#topic4

Question #29
Which signaling method uses robbed bit signaling?
  1. A
    CAS
  2. B
    FXS
  3. C
    FXO
  4. D
    CCS A

Correct Answer:
Explanation
Reference:
https://en.wikipedia.org/wiki/Robbed-bit_signaling

Question #30
Which is the Cisco recommended maximum jitter value of voice traffic over the network?
  1. A
    50 ms
  2. B
    60 ms
  3. C
    40 ms
  4. D
    30 ms

Correct Answer:
D
Voice calls, either one-to-one or on a conference connection capability, require the following:
✑ ≤ 150 ms of one-way latency from mouth to ear (per the ITU G.114 standard)
✑ ≤ 30 ms jitter
✑ ≤ 1 percent packet loss
✑ 17 to 106 kbps of guaranteed priority bandwidth per call (depending on the sampling rate, codec, and Layer 2 overhead)
✑ 150 bps (plus Layer 2 overhead) per phone of guaranteed bandwidth for voice control traffic
Reference:
http://www.ciscopress.com/articles/article.asp?p=471096&seqNum=6

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