Nokia 4A0-205 Exam Practice Test Instant Access

Question 1

By using the EPT run design command, are the previously designed elements removed?

AYes, they are but only the first time the command is launched as - for future design phases - the existing packs need to keep the same slotting.

BIt depends, the user is prompted to choose whether to delete or leave the previously designed elements.

CNot the design is always progressive, on top of the previous design.

DYes, although this is not happening in case of GMPLS-enabled nodes because existing slots cannot change as they are controlled by another manager (GMRE).

Answer : B

The EPT run design command can remove previously designed elements, but the user is prompted to choose whether to delete them or leave them intact. This allows the user to progress their design while still keeping the existing elements in place. If the user selects to leave the existing elements, then they will remain in the same slots. If GMPLS nodes are used, the existing slots cannot change as they are controlled by another manager (GMRE).

Question 2

What is the function of a pre-amplifier in an optical network?

AThrough the pre-amplifier, the optical signal is amplified at the receiver side after it travels along the fiber from another node.

BThrough the pre-amplifier, the optical signal is amplified at the transmitter side before it is sent to the line span.

CThrough the pre-amplifier, the optical signal is amplified both the receiver side and at the transmitter side.

DThrough the pre-amplifier, the optical signal is amplified within the node internally to recover internal losses due, for instance, to cascaded filters.

Answer : B

A pre-amplifier is an optical amplifier that is used to boost the power of the received optical signal before it is detected by the receiver in an optical communication system. This is done to overcome the loss of power that occurs as the signal travels through the optical fiber and to ensure that the receiver can detect the signal. The pre-amplification stage is typically located close to the receiver in order to minimize the distance that the signal has to travel between the amplifier and the receiver, which helps to reduce the noise and distortion in the signal.

Question 3

A user needs to check for interface details against the commands is the correct one?

Ashow interface 11starla 1/17/L1 detail

Bconfig card 11star1a interface 1/17 detail

C11starla 1/17 port-detail

Dconfig interface detail 1/17/L1

Answer : A

show interface 11starla 1/17/L1 detail is the correct command to check for interface details. This command will display detailed information about the specified interface, including its status, configuration, and statistics.

Question 4

Which use case is most suitable for the deployment of a star topology?

AAccess networks, for collecting traffic towards the main central node

BASON networks, to protect traffic via GMPL5 protocols

CBackbone networks, for supporting protection routes

DSNCP-protected links

Answer : A

A star topology is a network design where all devices are connected to a central hub, which acts as a central point of control and management for the network. This type of topology is commonly used in access networks, where a central node is used to aggregate traffic from multiple users or devices, and then forward it to the core network. This design allows for efficient use of resources and easy management of the network.

'Computer Networking: A Top-Down Approach' by James Kurose and Keith Ross (Chapter 3)

'Data Communications and Networking' by Behrouz A. Forouzan (Chapter 2)

Question 5

Where is the OPS card equipped to provide the optical channel protection?

ABetween the transponder and the amplifiers

BBetween the filters and the amplifiers

CBefore the transponder, on the client side, towards the external device

DBetween the transponder and the filter

Answer : A

According to the Nokia's 1830 Photonic Service Switch (PSS) product documentation, the Optical Protection Switching (OPS) card is equipped in the transponder and is responsible for providing optical channel protection between the transponder and the amplifiers. The OPS card monitors the optical signal and switches to a pre-configured protection path in case of signal degradation or loss.

Question 6

What is the meaning of first, second, and third window in the optical fiber propagation context?

AThese windows correspond to three different minimum and maximum optical power levels used for optical transmission.

BThese windows are three different wavelength intervals where the WDM optical transmission occurs.

CThese three windows are three different angles of incidence of the light injected by the laser into the fiber.

DDifferent optical transmission windows correspond to different safety requirements and rules for the related lasers operating with these windows.

Answer : B

In optical fiber propagation context, the first, second, and third window refer to different wavelength intervals where the WDM (Wavelength Division Multiplexing) optical transmission occurs.

The first window is the lowest loss window and is typically in the range of 1300-1324nm. This is the most commonly used window for long-haul communications.

The second window is the 1550 nm window and is the most widely used window for long-haul and ultra-long-haul communications. This window has a lower attenuation than the first window, but it also has more dispersion, which can limit the maximum transmission distance.

The third window is the range of 1625-1675 nm, it is also called the L-band window. This window has lower attenuation than the first and second window but its usage is limited due to the high cost of equipment and lack of commercial devices.

These windows are used in WDM systems to increase the capacity of the fiber by transmitting multiple channels of data at different wavelengths on the same fiber.

A,C,D are not correct as they are not related to the meaning of first, second, and third window in the optical fiber propagation context.

Nokia Optical Networking Fundamentals, Nokia Press (ISBN:978-1-4822-8109-4)

https://www.nokia.com/networks/solutions/optical-networking/

https://en.wikipedia.org/wiki/Wavelength-division_multiplexing

Question 7

What is the metro area network?

AThe metro area network is that portion of network that passes through a city to provide connections to several customers.

BThe metro area network is located between access and core domains.

CThe metro area network is made of OCS/SWDM nodes only, as no pure photonic nodes are used here.

DThe metro area network is located in between two access area networks and made of photonic nodes only (no OCS/SWDM nodes are used there).

Answer : A

The Metro Area Network (MAN) is a telecommunications network that spans a metropolitan area and connects multiple local area networks (LANs) or business networks together. It typically covers an area that is larger than a LAN but smaller than a wide area network (WAN). The purpose of a MAN is to provide a high-bandwidth, low-latency communication infrastructure for businesses and other organizations in a metropolitan area.

Cisco, 'Metro Ethernet Services,' https://www.cisco.com/c/en/us/solutions/service-provider/metro-ethernet-services/index.html

Techopedia, 'Metro Area Network (MAN),' https://www.techopedia.com/definition/26896/metro-area-network-man

Nokia Optical Networking Fundamentals 4A0-205 Exam Practice Test