1z0-404 Oracle Practice Test Questions and Exam Dumps
Question No 1:
Scenario: You are working with an Oracle Communications Session Border Controller (SBC) and need to apply Header Manipulation Rules (HMRs) to modify SIP headers for routing, normalization, or security purposes. Header Manipulation Rules are essential for controlling how SIP headers are handled during inbound and outbound message flows.
Which three configuration elements can be used to apply an inbound Header Manipulation Rule (HMR) by setting the in-manipulationid parameter within your existing configuration?
A. Configure in-manipulationid under the network-interface configuration element.
B. Configure in-manipulationid under the session-agent configuration element.
C. Configure in-manipulationid under the sip-interface configuration element.
D. Configure in-manipulationid under the session-agent configuration element.
E. Configure in-manipulationid under the session-group configuration element.
Correct Answers:
B. Configure in-manipulationid under the session-agent configuration element
C. Configure in-manipulationid under the sip-interface configuration element
E. Configure in-manipulationid under the session-group configuration element
Explanation:
Header Manipulation Rules (HMRs) are used in Oracle SBC environments to modify SIP headers for compatibility, security, or functional requirements. HMRs can be applied both inbound (in-manipulationid) and outbound (out-manipulationid), depending on the direction of SIP traffic.
To correctly apply inbound HMRs, you must set the in-manipulationid parameter in configuration elements that manage SIP traffic flow. These valid elements include:
Session-Agent (Option B):
The session-agent represents a specific remote peer or SIP endpoint. Applying HMRs here allows SIP header manipulation for traffic exchanged with that specific peer.SIP-Interface (Option C):
The sip-interface manages SIP signaling on a particular IP address and port. Applying an HMR at this level affects all SIP traffic entering the system via that interface.Session-Group (Option E):
A session-group is a logical grouping of session-agents. Setting the in-manipulationid here allows uniform header manipulation across all associated session-agents.
Option A (network-interface) is incorrect because network interfaces are Layer 3/Layer 4 elements and do not handle SIP signaling directly.
Option D is a repeat of Option B and is therefore not counted twice.
Thus, the correct configuration elements to apply inbound HMRs are:
B. Session-Agent, C. SIP-Interface, and E. Session-Group.
Question No 2:
Scenario: In an Access-Backbone architecture, your Oracle Session Border Controller (SBC) is failing to route calls from the backbone realm to a specific SIP endpoint in the access realm. This routing failure may impact communication between users and services. To resolve the issue, you need to identify the correct configuration element involved in the routing logic for this direction of call flow.
What is the most effective way to troubleshoot why the SBC is not routing calls from the backbone realm to the access realm?
A. Run the notify berpd force command.
B. Run the show sipd endpoint-ip <phone number> command.
C. Check the sip-manipulation configuration element used for routing between realms.
D. Check the registration-cache configuration element used for routing from access to backbone.
E. Check the local-policy configuration element responsible for routing from backbone to access.
Correct Answer:
E. Check the local-policy configuration element responsible for routing from backbone to access.
Explanation:
In an Access-Backbone architecture, routing between SIP realms (such as backbone-to-access or access-to-backbone) is typically governed by local policies configured in the local-policy element of the Oracle SBC.
Option E is correct because the local-policy configuration defines explicit routing rules that map SIP requests to destination session agents based on criteria such as SIP method, destination IP/domain, or request URI. If calls from the backbone realm to the access realm are failing, the issue is most likely due to:
A missing or misconfigured local-policy entry.
An incorrect match rule that fails to identify the SIP endpoint as a valid route.
A disabled or mismatched session agent associated with the rule.
Option A (notify berpd force) is used to force a BERPD synchronization and is not directly related to SIP call routing.
Option B (show sipd endpoint-ip <phone number>) is useful for looking up endpoint details but doesn’t address policy routing issues.
Option C (checking sip-manipulation) applies to SIP header modifications, not call routing.
Option D (checking registration-cache) is relevant for routing from access to backbone using registered contacts—not for backbone-to-access direction.
Therefore, to troubleshoot and resolve the routing issue, review and correct the local-policy entries for the backbone-to-access call flow, making Option E the correct answer.
Question No 3:
Scenario: In the context of Oracle’s Session Border Controller (SBC), realms play a crucial role in managing and segmenting VoIP network traffic. When configuring or analyzing SBC operations, it’s important to understand what a realm represents and how it functions within VoIP architecture.
Question:
Which two statements accurately describe the purpose and characteristics of a realm in the Session Border Controller? (Choose two.)
A. A realm can have only one steering poolport configured per realm.
B. A realm represents a Layer 3 abstraction of a VoIP network.
C. A realm is a logical definition of a network or set of networks that consist of devices enabling real-time communication.
D. A realm represents a Layer 5 abstraction of a VoIP network.
E. A realm is a group of IP devices that perform IP routing functions.
Correct Answers:
B. A realm represents a Layer 3 abstraction of a VoIP network.
C. A realm is a logical definition of a network or set of networks comprising devices that provide real-time communication.
Explanation:
In Oracle Session Border Controller (SBC) terminology, a realm defines a logical boundary between different IP networks. Realms are used to separate VoIP traffic flows, enabling control over how media and signaling messages traverse the SBC between different network segments—such as access networks, backbone networks, and service provider environments.
Option B is correct: Realms are considered a Layer 3 abstraction because they define IP network segments that share similar addressing and routing behavior. Each realm typically corresponds to a unique subnet or routing domain.
Option C is also correct: A realm provides a logical grouping of devices and networks that participate in real-time communication, such as SIP endpoints, session agents, and media gateways. It enables the SBC to apply different routing, NAT, and security policies based on traffic entering or exiting a realm.
Option A is incorrect because a realm can support multiple steering poolports, allowing flexible resource and media port management.
Option D is incorrect as Layer 5 pertains to the session layer, which handles protocols like SIP. The realm operates at Layer 3, not Layer 5.
Option E is misleading—while realms group IP devices, they are not defined based on routing functions but rather as logical VoIP segments.
In summary, realms define Layer 3 VoIP network boundaries and logically group devices for real-time communication, making Options B and C the correct answers.
Question No 4:
Scenario: You are setting up a new Oracle Session Border Controller (SBC) and need to configure its boot parameters to begin the initial system setup. This includes specifying essential system-level configurations such as the IP address, default gateway, subnet mask, and hostname. Understanding the correct first step ensures the SBC is accessible and secure during its initial configuration.
What is the first action you must take when configuring the boot parameters of the Session Border Controller?
A. Reset the system clock
B. Know the superuser mode password and access the configuration mode
C. Disable FTP access to the wancom0 management interface
D. Obtain the boot parameter license
E. Verify the configuration by executing the verify-config command
Correct Answer:
B. Know the superuser mode password and access the configuration mode
Explanation:
When setting up the boot parameters for the Oracle Session Border Controller (SBC), the very first step is to access the system’s configuration interface. To do this, you must have the superuser (root) password, which allows you to enter the superuser or configuration mode. Without this elevated access, you cannot modify critical boot settings, such as:
IP addressing
Default gateway
System hostname
Network interface behavior
Access permissions
These boot parameters are essential for making the SBC reachable over the network and for enabling further configurations such as software updates, licensing, and security hardening.
Option A (resetting the system clock) is important for accurate logging and TLS operations but is not the first step.
Option C (disabling FTP access) is a security best practice but occurs after boot parameter setup.
Option D (obtaining a license) is necessary for full feature activation but comes after initial system configuration.
Option E (verify-config command) is used to check the configuration for errors but is not relevant during initial boot parameter setup.
Therefore, the correct first step is to access configuration mode using the superuser credentials, making Option B the correct answer.
Question No 5:
Scenario: In Voice over IP (VoIP) deployments, Network Address Translation (NAT) is commonly used to allow private IP addresses to communicate over public networks. However, NAT introduces specific challenges when used with VoIP protocols such as SIP and RTP, especially since these protocols rely on end-to-end communication and IP address visibility in signaling and media paths.
Question:
Which two issues are commonly introduced by the use of NAT in VoIP networks? (Choose two.)
A. NAT poses no major concerns in VoIP deployments.
B. NAT devices block unsolicited incoming signaling and media traffic.
C. NAT devices block unsolicited signaling but allow incoming media traffic.
D. NAT pinholes expire after a configurable timeout, which may drop active sessions.
E. NAT devices may become overloaded by a high volume of registration requests.
Correct Answers:
B. NAT devices block unsolicited incoming signaling and media traffic
D. NAT pinholes expire after a configurable timeout, which may drop active sessions
Explanation:
Network Address Translation (NAT) creates challenges in VoIP environments because it modifies IP headers, which can disrupt the way signaling and media are established between endpoints. VoIP protocols such as SIP (Session Initiation Protocol) often embed IP addresses within the message body. NAT devices, unaware of these embedded addresses, can cause communication failures unless additional NAT traversal techniques are implemented (e.g., STUN, TURN, or SBCs).
Option B is correct:
NAT devices typically block unsolicited inbound traffic by default as a security measure. This includes both SIP signaling (e.g., incoming INVITE requests) and RTP media streams unless an outbound connection has previously established a mapping (pinholing). This behavior breaks the end-to-end nature of VoIP sessions.
Option D is also correct:
NAT devices maintain pinholes (temporary port mappings) for established connections. If no traffic is detected within a certain timeframe, these pinholes may expire, causing dropped calls or one-way audio due to disrupted RTP flow or signaling paths.
Option A is incorrect because NAT introduces significant challenges in VoIP deployments.
Option C is misleading—NAT blocks both signaling and media unless specifically allowed.
Option E is not generally a NAT-specific issue. Overload from registrations is more related to SIP proxy or registrar capacity, not NAT behavior.
Thus, B and D accurately describe key problems NATs introduce into VoIP networks.
Question No 6:
Scenario: When configuring and maintaining a network appliance such as an Oracle Session Border Controller (SBC) or similar device, it’s essential to understand where critical information—such as passwords and licensing details—is securely stored. This helps in proper system backup, recovery, and ensuring the persistence of configurations across reboots.
Where are passwords and license information stored on the device to ensure they are retained even after a power cycle or reboot?
A. Non-Volatile Random Access Memory (NVRAM)
B. Content Addressable Memory (CAM)
C. RAM (Random Access Memory)
D. SDRAM (Synchronous Dynamic Random Access Memory)
E. Boot Flash
Correct Answer:
E. Boot Flash
Explanation:
In network and telecommunications appliances like the Oracle Session Border Controller (SBC), Boot Flash is a type of non-volatile storage that retains its content even after the device is powered off or rebooted. This makes it the ideal location for storing critical system data such as:
System passwords (superuser, admin, maintenance accounts)
Licensing information, including entitlement keys and feature activations
Startup configuration files and default system boot parameters
Option E – Boot Flash – is correct because it ensures persistent storage. All vital files necessary for system operation—including licenses and authentication credentials—must be available at system boot and must not be lost during power cycles.
Option A – NVRAM, while also non-volatile, is typically reserved for BIOS settings or low-level system configurations, not for licensing or password storage in most SBC devices.
Option B – CAM (Content Addressable Memory) is used in high-speed switching for rapid lookups and is not used for storing persistent configuration data.
Option C and D – RAM/SDRAM are volatile memory types that lose all data when the device is powered off. They are used for temporary operations and runtime processing but not for storing permanent data.
Therefore, Boot Flash is the correct and reliable location for storing passwords and licensing data, making Option E the right answer.
Question No 7:
Scenario: In a typical VoIP deployment, SIP endpoints (such as phones or soft clients) may reside behind Network Address Translation (NAT) devices. To maintain persistent communication with such endpoints, the Session Border Controller (SBC) must keep the NAT pinhole (temporary port mapping) open, preventing the NAT device from closing it due to inactivity.
How does the Session Border Controller ensure that a NAT pinhole remains open for continuous communication with a SIP endpoint located behind a NAT device?
A. By modifying the expires= parameter in 200 OK responses to REGISTER requests
B. By modifying the expires= parameter in 200 OK responses to INVITE requests
C. By sending PING requests to the endpoint’s NAT address
D. By sending ARP requests at a defined frequency
E. By transmitting messages at a defined interval to maintain NAT pinholes
Correct Answer:
E. By transmitting messages at a defined interval to maintain NAT pinholes
Explanation:
In VoIP networks, NAT devices open temporary port mappings (called pinhole entries) when outbound traffic is detected. These mappings allow return traffic to flow back to the device behind the NAT. However, if no traffic is observed for a period of time, the NAT will close the pinhole, potentially breaking SIP or RTP sessions.
Option E is correct: The SBC solves this by periodically sending SIP or RTP keep-alive messages to the endpoint. These messages prevent the NAT from expiring the pinhole, ensuring the device remains reachable. This behavior is configurable using features like SIP keep-alives, OPTIONS polling, or even custom periodic messaging to sustain the NAT mapping.
Option A and B refer to the expires= parameter, which determines the validity period of SIP registration or dialog, not NAT pinhole persistence.
Option C (PINGs) refers to ICMP traffic, which NATs may not recognize as SIP-related and won't necessarily keep the SIP pinhole alive.
Option D (ARP requests) operates at Layer 2 and is irrelevant to Layer 3 NAT pinhole behavior, particularly across routers or NAT devices.
In summary, to keep NAT pinholes open for SIP endpoints behind NATs, the SBC transmits periodic signaling or media messages, making Option E the correct answer.
Question No 8:
Scenario: In order to enhance security on your Oracle Session Border Controller (SBC), you’ve decided to disable Telnet access on one or more media interfaces. This is a best practice to reduce the attack surface, as Telnet is an insecure protocol that transmits credentials in plain text.
Which two configuration methods can be used to remove Telnet support from a media interface on the SBC? (Choose two.)
A. Go to the network-interface configuration element and execute the delete-hip-ip <IP address> command.
B. Go to the phy-interface configuration element and run the remove-hip-ip <IP address> command.
C. Go to the network-interface configuration element and execute the remove-telnet-ip <IP address> command.
D. Go to the network-interface configuration element and run the remove-hip-ip <IP address> command.
E. Go to the phy-interface configuration element and execute the remove-telnet-ip <IP address> command.
Correct Answers:
C. Go to the network-interface configuration element and execute the remove-telnet-ip <IP address> command.
E. Go to the phy-interface configuration element and execute the remove-telnet-ip <IP address> command.
Explanation:
To harden the security posture of an Oracle Session Border Controller, it's common to disable Telnet access, particularly on media-facing interfaces, where it's unnecessary and could pose a risk.
Option C is correct: Using the network-interface element and running the remove-telnet-ip command specifically removes Telnet access for a given logical IP address configured on the SBC.
Option E is also correct: Similarly, Telnet access can be restricted by navigating to the phy-interface (physical interface) configuration and executing the same remove-telnet-ip command. This disables Telnet access tied to that specific physical interface IP address.
Option A and D reference delete-hip-ip or remove-hip-ip, which are used to remove host IP addresses, not Telnet access. These commands may indirectly affect Telnet, but they are not the correct method for managing Telnet-specific permissions.
Option B also refers to remove-hip-ip, which deletes IP bindings but not Telnet access control.
Therefore, to explicitly remove Telnet support, use the remove-telnet-ip command under either the network-interface or phy-interface configuration contexts, making Options C and E the correct answers.
Question No 9:
Scenario: You are configuring a network interface on an Oracle Session Border Controller (SBC) to enable it to handle both signaling and media traffic over a specific VLAN (Virtual Local Area Network). The VLAN ID assigned for this configuration is VLAN 12, and you need to ensure the correct interface and associated parameters are set to properly support this environment.
Which two configuration steps are valid for enabling support for VLAN 12 on the SBC interface? (Choose two.)
A. In the network-interface configuration element, set the sub-port-id parameter to 12.
B. In the network-interface configuration element, set the sub-port-id parameter to 0.
C. In the phy-interface configuration element, configure the hip-id parameter.
D. In the phy-interface configuration element, configure the pri-utility-address parameter.
E. In the network-interface configuration element, configure the name parameter.
Correct Answers:
A. In the network-interface configuration element, set the sub-port-id parameter to 12.
C. In the phy-interface configuration element, configure the hip-id parameter.
Explanation:
To properly configure a network interface for VLAN-tagged signaling and media traffic, you must associate a sub-interface (VLAN interface) with the correct VLAN ID and link it to a physical interface.
Option A is correct:
Setting the sub-port-id to 12 in the network-interface element binds that logical interface to VLAN 12, enabling the SBC to recognize and handle traffic tagged for that VLAN.
Option C is correct:
In the phy-interface configuration, the hip-id parameter links the physical interface to the host interface (HIP) configuration. This association is necessary to activate the interface and enable routing of signaling/media to the corresponding VLAN-tagged interface.
Option B is incorrect because sub-port-id set to 0 is used for untagged interfaces, not VLAN-tagged ones like VLAN 12.
Option D configures a utility address, which is unrelated to VLAN or traffic handling.
Option E refers to the name parameter in the network-interface element, which is helpful for labeling but does not impact VLAN functionality.
Therefore, to enable signaling and media over VLAN 12, you must configure the sub-port-id to 12 and correctly associate the hip-id on the physical interface, making Options A and C the correct answers.
