300-075 Exam
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Q121. Which two statements about symmetric encryption are true? (Choose two.)
A. With symmetric encryption, the encryption key equals the decryption key.
B. Symmetric encryption is commonly used to sign asymmetric keys.
C. Symmetric encryption is a good choice for real-time encryption of bulk data.
D. Symmetric encryption uses asymmetric keys.
Answer: A,C
Explanation:
Incorrect Answer: B, D There are two basic techniques for encrypting information: symmetric encryption (also called secret key encryption) and asymmetric encryption (also called public key encryption.) in symmetric key As long as both sender and recipient know the secret key, they can encrypt and decrypt all messages that use this key. A public key is made freely available to anyone who might want to send you a message. A second, private key is kept secret, so that only you know it. Link:
http://support.microsoft.com/kb/246071
Q122. Which option describes a function of SIP preconditions?
A. SIP preconditions enable end-to-end RSVP over an SIP trunk.
B. SIP preconditions enable RSVP between Cisco IP Phones.
C. SIP preconditions can be enabled in a gatekeeper.
D. SIP preconditions enable end-to-end RSVP for calls through the PSTN.
Answer: A
Q123. When an incoming PSTN call arrives at an H.323 gateway, how does the called number get normalized to an internal directory number in Cisco Unified Communications Manager?
A. Normalization is done by configuring the significant digits for inbound calls on the H.323 gateway configuration in Cisco Unified Communications Manager.
B. Normalization is done using route patterns.
C. Normalization is done using the gateway incoming calling party prefixes based on number type.
D. Normalization is achieved by local route group that is assigned to the H.323 gateway.
Answer: A
Q124. Which option is known as the location attribute that the global dialplan replication uses to advertise its dial plan information?
A. location controller
B. route pattern
C. route string
D. URI
Answer: C
Q125. When an incoming PSTN call arrives at an MGCP gateway, how does the calling number get normalized to a global E.164 number with the + prefix in Cisco Unified Communications Manager?
A. Normalization is done using translation patterns.
B. Normalization is done using route patterns.
C. Normalization is done using the gateway incoming called party prefixes based on number type.
D. Normalization is done using the gateway incoming calling party prefixes based on number type.
E. Normalization is achieved by local route group that is assigned to the MGCP gateway.
Answer: D
Explanation:
Incorrect Answer: A, B, C, E Configuring calling party normalization alleviates issues with toll bypass where the call is routed to multiple locations over the IP WAN. In addition, it allows Cisco Unified Communications Manager to distinguish the origin of the call to globalize or localize the calling party number for the phone user. Link: http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/admin/8_6_1/ccmfeat/fscallpn.html
Q126. Which two statements regarding you configuring a traversal server and traversal client relationship are true? (Choose two.)
A. VCS supports only the H.460.18/19 protocol for H.323 traversal calls.
B. VCS supports either the Assent or the H.460.18/19 protocol for H.323 traversal calls.
C. VCS supports either the Assent or the H.460.18/19 protocol for SIP traversal calls.
D. If the Assent protocol is configured, a TCP/TLS connection is established from the traversal client to the traversal server for SIP signaling.
E. A VCS Expressway located in the public network or DMZ acts as the firewall traversal client.
Answer: B,D
Q127. Which statement is true when device mobility mode is enabled or disabled in the Phone
Configuration window?
A. The device mobility mode phone settings take precedence over the service parameter settings.
B. The service parameter settings take precedence over the device mobility mode phone settings.
C. The combined service parameter settings and the device mobility mode phone settings will be used.
D. The default settings will be used due to the conflicts.
Answer: A
Q128. Refer to the exhibit.
Locations-based CAC has been configured between HQ and the BR site. Assume that the priority queue has been provisioned correctly for three G.729 calls. What happens when
the fourth call is placed from HO to BR?
A. The call will get through via the WAN. But it will experience poor audio quality.
B. The call will fail.
C. The call will be queued until one of the existing calls drop.
D. The call will get through without any issues.
Answer: B
Q129. The network administrator of Enterprise X receives reports that at peak hours, some calls between remote offices are not passing through. Investigation shows no connectivity problems. The network administrator wants to estimate the volume of calls being affected by this issue. Which two RTMT counters can give more information on this? (Choose two.)
A. CallsRingNoAnswer
B. OutOfResources
C. LocationOutOfResources
D. RequestsThrottled
E. CallsAttempted
Answer: B,C
Q130. While operating in SRST, what is needed to route calls outside of the remote site location to the PSTN?
A. SIP trunk
B. CallManager route patterns
C. translation patterns
D. POTS dial peers
E. VOIP dial peers
Answer: D
Explanation:
Incorrect Answer: A, B, C, E
in time of srst configuration on router, please configure a dial-peer so that call flow in SRST mode.