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Nokia Optical Networking Fundamentals (4A0-205) Exam Question & Answer: What is a trail?

Nokia Optical Networking Fundamentals (4A0-205) certification exam practice question and answer (Q&A) dump with detail explanation and reference available free, helpful to pass the Nokia Optical Networking Fundamentals (4A0-205) exam and earn Nokia Optical Networking Fundamentals (4A0-205) certification.

Question

Exam Question

What is a trail?

A. An entity to encapsulate a low order signal into a high order container
B. A transparent transport of a client signal
C. A link between end points to increase the power budget of the optical link
D. A physical link between two optical amplifiers

Correct Answer

D. A physical link between two optical amplifiers

Explanation 1

According to Nokia’s website, a trail is an entity to encapsulate a low order signal into a high order container. Therefore, the correct answer is A.

Explanation 2

A trail is an entity to encapsulate a low order signal into a high order container. This is option A.

In optical networking, a trail is a logical connection between two network elements that carries client signals. It is used to transport client signals transparently over the network. A trail can be created by encapsulating a low order signal into a high order container. The high order container can then be transported over the network using optical transport network (OTN) or wavelength division multiplexing (WDM) technology.

Explanation 3

A trail in optical networking is a transparent transport of a client signal. A trail can be composed of different segments, such as optical channel network connections (OCHNC), optical channel client connections (OCHCC), and optical channel trails (OCH Trail). A trail can also be used for link failure monitoring in software-defined optical networks. Therefore, the correct answer is B. A transparent transport of a client signal.

Explanation 4

In optical networking, a trail refers to the transparent transport of a client signal over an optical network. It involves encapsulating the client signal into a higher order container for transmission.

Therefore, the correct answer is: B. A transparent transport of a client signal

A trail is responsible for carrying the client signal from one network element to another without modification or processing of the signal itself. It acts as a conduit to transmit the client signal over the optical network infrastructure, enabling connectivity between different network elements. The trail allows for the seamless transport of data, voice, or video signals between different locations in the network.

Trails are an essential concept in optical networking as they provide the foundation for establishing end-to-end connectivity and enable the efficient transmission of information across the network. By encapsulating client signals within higher order containers, optical networks can effectively multiplex and transport multiple signals simultaneously, maximizing the utilization of the network resources.

Explanation 5

The correct answer is B. A trail is a transparent transport of a client signal. A trail is an end-to-end connection that carries a client signal between two network elements. A trail can be composed of one or more sections, which are the physical links between adjacent network elements. A trail can also be composed of one or more subnetwork connections (SNCs), which are logical connections that span multiple sections and provide protection and restoration mechanisms. A trail can carry different types of client signals, such as Ethernet, SDH/SONET, OTN, or Fibre Channel.

A trail is not an entity to encapsulate a low order signal into a high order container. That is the definition of a virtual container (VC) in SDH/SONET networks. A trail is not a link between end points to increase the power budget of the optical link. That is the function of an optical amplifier. A trail is not a physical link between two optical amplifiers. That is the definition of a span.

Explanation 6

The correct answer is B. A trail is a transparent transport of a client signal.

A trail is a point-to-point connection between two optical network nodes. It is a unidirectional connection that carries a single client signal. The client signal can be any type of optical signal, such as a SONET/SDH signal, an OTN signal, or a wavelength.

A trail is created by configuring the optical network nodes to connect the two end points. The nodes then create a lightpath between the two end points. The lightpath is a physical connection that carries the client signal.

The client signal is transported transparently through the optical network. This means that the optical network does not modify the client signal in any way. The client signal is simply carried from one end point to the other.

Trails are used to create optical networks that are flexible and scalable. They allow optical networks to be easily reconfigured to meet changing needs.

The other options are incorrect. Option A is incorrect because a trail is not an entity. Option C is incorrect because a trail does not increase the power budget of the optical link. Option D is incorrect because a trail is not a physical link between two optical amplifiers.

Explanation 7

The correct answer is B. A transparent transport of a client signal.

A trail is a point-to-point connection between two network elements in an optical network. It is used to transport a client signal, such as a SONET/SDH signal, from one network element to another. The trail is transparent to the client signal, which means that the signal is not modified in any way as it is transported through the network.

The trail is composed of a number of links, which are physical connections between network elements. The links are typically made of optical fiber, and they can be either unidirectional or bidirectional. The trail is also composed of a number of nodes, which are network elements that are capable of switching or routing the client signal.

The trail is configured by the network operator, and it is used to provide a reliable and efficient way to transport client signals through the network. The trail can be used to transport a variety of client signals, including SONET/SDH, Ethernet, and IP.

The other options are incorrect because they do not accurately describe a trail. Option A is incorrect because a trail does not encapsulate a low order signal into a high order container. Option C is incorrect because a trail is not a link between end points to increase the power budget of the optical link. Option D is incorrect because a trail is not a physical link between two optical amplifiers.

Explanation 8

The correct answer is B. A transparent transport of a client signal.

A trail is a point-to-point connection between two network elements. It is a logical entity that is used to transport a client signal from one network element to another. The client signal can be any type of signal, such as an Ethernet signal, a SONET/SDH signal, or a wavelength signal.

The trail is responsible for the transparent transport of the client signal. This means that the trail does not modify the client signal in any way. The client signal is simply transported from one network element to another.

The trail is also responsible for the protection of the client signal. This means that the trail will ensure that the client signal is not lost or corrupted during transmission.

The trail is a key component of any optical network. It is responsible for the transparent transport and protection of the client signal.

The other options are incorrect because they do not accurately describe a trail. Option A is incorrect because a trail is not an entity that encapsulates a low order signal into a high order container. Option C is incorrect because a trail is not a link between end points to increase the power budget of the optical link. Option D is incorrect because a trail is not a physical link between two optical amplifiers.

Reference

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