Oracle 1z0-400 問題集

質問 1：
You are examining a SIP packet.
The only SIP method defined in IETF RFC documents that never receives a final response is:
A. NOTIFY
B. OPTIONS
C. ACK
D. CANCEL
E. BENOTIFY
正解：E

質問 2：
Which two statements regarding SIP processing are TRUE?
A. The combination of the To tag, From tag, and Call-ID completely defines a peer-to-peer SIP relationship and is referred to as a dialog.
B. SIP sessions are terminated and re-originated as new sessions as they are routed through the Session Border Controller.
C. An initial INVITE will contain a From header tag and a To header tag as a globally unique identifier for the dialog.
D. A CANCEL method can terminate a dialog.
E. To avoid retransmissions, User Agents must forward received 100 Trying messages to their next hop.
正解：A,C

質問 3：
What are two differences between the SIP NAT Bridge (SNB) and the Single SIP NAT Homed in a Trusted Network (SSNHTN) models on the Session Border Controller?
A. Where is no distinguishable difference between the two models.
B. In the SSNHTN model, the home proxy address(HPA) is set to point to sipd.
C. In a SIP-NAT Bridge (SNB), multiple access and backbone realms are allowed. In the SSNHTN model, only one backbone realm is allowed.
D. In the SSNHTN model, the home address and home proxy address (HPA) are addressed from a range that is in the backbone realm.
E. In the SSNHTN model, the home proxy address (HPA)is set to 1.1.1.1, as the HPA is only needed in SNB architectures.
正解：B,C

質問 4：
The __________ parameter in the sip-interface element indicates how often a User Agent (UA) located behind a NAT should re-register with the Session Border Controller.
A. registration-interval
B. nat-mode
C. nat-traversal
D. min-reg-expire
E. nat-interval
正解：C

質問 5：
When configuring the Net-Net 4500, __________ SIP interface(s) is/are allowed per realm, and __________ SIP port (s) is/are allowed for a SIP interface.
A. One; 1024
B. One; one
C. Multiple; 999
D. One; multiple
E. Multiple; multiple
正解：D

質問 6：
Which option tag is used for reliability of provisional responses in SIP messages?
A. Required
B. Rel
C. Supported
D. 100rel
E. Prack
正解：D

質問 7：
Which statement about the Net-Net 4500 is FALSE?
A. The Net-Net 4500 media directing and control hides network topology at the forwarding level, while session routing and signaling hide it at the signaling level.
B. MGCP to SIP interworking function (IWF) is not supported.
C. Different SIP Response Code mappings can be configured for each Soft-switch to which the Net-Net 4500 signals.
D. The Net-Net 4500 can perform interworking between SIP REGISTER messages and
E. The Net-Net 4500 is the source and destination for all signaling messages and media streams coming into and leaving the provider's network.
F. 323 RRQs (Registration Request).
正解：C