1Z0-400 | how many questions of 1Z0-400 vce?
Q1. 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. In a SIP-NAT Bridge (SNB), multiple access and backbone realms are allowed. In the SSNHTN model, only one backbone realm is allowed.
B. 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.
C. In the SSNHTN model, the home proxy address(HPA) is set to point to sipd.
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. Where is no distinguishable difference between the two models.
Answer: A,C
Q2. Which two Net-Net 4500 Realm Bridging models are valid in a SIP environment?
A. Single SIP-NAT Hosted in a Private Network (SSHPN)
B. Single SIP-NAT Homed in an Access Network (SSNHAN)
C. Multiple SIP-NATs Homed in an Access Network (MSMHAN)
D. Policy-Based Realm Bridging with Header Manipulation Rules (PBRB-HMR)
E. Policy-Based SIP-Realm-NAT (PBSRN)
Answer: B,D
Q3. Which two statements about realms are TRUE?
A. You must have a minimum of three realms in any configuration, one of which must be designated as the home realm.
B. All endpoints within a realm must reside within the same subnet as the Net-Net 4500.
C. Although you can use both TCP and UDP concurrently as the transport protocol, you can only have one SIP-interface per realm.
D. You can associate multiple realms with a single network interface.
E. You can associate multiple network interfaces with a single realm.
Answer: A,E
Q4. Your Net-Net 4500 is configured as the source and destination for all signaling messages and media streams coming into and leaving the provider's network.
Which two SIP functions does it provide?
A. Edge proxy
B. Firewall
C. Back to Back User Agent
D. Media gateway
E. An IP edge router
Answer: A,D
Q5. Session Initiation Protocol (SIP) is an Application layer control protocol that performs which two functions?
A. Establish, modify and terminate multimedia sessions.
B. Reserve resources for multimedia sessions.
C. Provide network transport services for real-time applications such as voice and video.
D. Describe the supported media attributes for the session.
E. Support redirection services.
Answer: A,C
Explanation: Reference:
http://docs.oracle.com/javase/7/docs/api/java/net/InetAddress.html
Q6. Which is NOT part of the Net-Net 4500's front panel:
A. Power and status LEDs B. A pinhole for issuing reset
C. A flip-down door covering two PCMCIA slots
D. A fan pack with removable and cleanable fan filter
E. A USB port for local storage
Answer: C
Q7. Which statement is TRUE about the phy-interface configuration element?
A. A phy-interface element must be configured for each interface used for signaling and/or media.
B. All modifications to the phy-interface configuration element require a reboot of the Net-Net 4500.
C. Only one phy-interface configuration element is created for all signaling/media interfaces.
D. The wancom interfaces used for high availability do not require explicit phy-interface configuration elements.
E. Configuration elements used to carry signaling and/or media must be designated as type
"Control".
Answer: B
Q8. Which H.323 signaling technology is used between endpoints to establish a connection?
A. H.225.0 Q.931
B. H.225.0 RAS
C. H.245
D. H.261
E. H.263
Answer: C
Q9. Which two statements about the Session Initiation Protocol (SIP) are TRUE?
A. SIP messages are formatted in MIME/64 hex format.
B. SIP messages are encoded in binary.
C. A SIP ACK is used to acknowledge receipt of each message sent during call setup.
D. Every SIP request has a method.
E. SIP INVITE method may be used to initiate a call.
Answer: A,E
Q10. Which two signaling services are supported on the Net-Net 4500?
A. G.711 Back-to-Back linecoding
B. H.248 back-to-back virtual gateway and call agent
C. SIP-MGCP Inter-working function
D. MGCP back-to-back virtual gateway and call agent
E. H.323 to SIP codec transcoding
Answer: B,D