Online Access Free 1z0-400 Exam Questions

You are working with a Net-Net 4500 Session Border Controller.What will result from the execution of the delete-configuration command?

• A.Both the "saved" and "running" configuration numbers are incremented by 1.
• B.Deletion of all configuration files stored in the /code/gzConfig directory.
• C.Deletion of the bootparameters: "target name" field.
• D.Deletion of non-system default licenses.
• E.Automatic reboot of the operating system.

Which two parameters MUST be specified when configuring a local policy for SIP Peering?

• A.sip-nat
• B.from-address
• C.ingress-policy element and egress-policy element
• D.to-address
• E.sipd

Which two statements about the Session Initiation Protocol (SIP) are TRUE?

• A.SIP uses the Session Description Protocol to identify media details for the call being set up.
• B.SIP uses HTTP to send response codes, such as 403 Unavailable messages.
• C.In SIP, the CSeq is incremented for each new transaction, except ACK, from a user agent within a dialog.
• D.A SIP ACK is used to acknowledge receipt of each message sent during call setup.
• E.SIP messages are formatted in MIME/64 hex format.

Which two statements regarding SIP processing are TRUE?

• A.An initial INVITE will contain a From header tag and a To header tag as a globally unique identifier for the dialog.
• B.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.
• C.A CANCEL method can terminate a dialog.
• D.To avoid retransmissions, User Agents must forward received 100 Trying messages to their next hop.
• E.SIP sessions are terminated and re-originated as new sessions as they are routed through the Session Border Controller.

How does the Session Border Controller ensure that a pinhole is kept open for persistent communication to a SIP endpoint behind a NAT device?

• A.By changing the expires= parameter to a defined value in 200 OK responses to INVITEs
• B.By sending ARP requests at a defined frequency
• C.By changing the expires= parameter to a defined value in 200 OK responses to REGISTERS
• D.By sending messages at a defined frequency
• E.By issuing PINGs to the endpoint's NAT address