4A0-220 Dumps With Exact Questions and Answers

To configure the Trail template in NFM-T for an Uplink board (such as 2UC400) in a network with only LI restoration capability, you need to check the Logical Link box, set the Port Type to Unterminated, uncheck the ASON Routed box, and uncheck the ASON Tunnel box. This configuration allows you to create a logical link between two Uplink boards that can be used for LI restoration. The logical link is not terminated at the Uplink board, but at the OTU board. The ASON Routed option is not needed for LI restoration, as the LSPs are established by NFM-T and not by GMPLS. The ASON Tunnel option is not applicable for Uplink boards.  References  :  Nokia Advanced Optical Network Management with NFM-T Course | Nokia ,  Nokia 1830 PSS-4, PSS-8, PSS-16 and PSS-32 Platforms - NATO

SFD is not a GMPLS protocol, but a term used in optical networks to refer to the Source Frequency Definition, which is a parameter that specifies the frequency of a wavelength channel 4 .  GMPLS protocols are those that enable the control and management of different types of switching technologies, such as packet, wavelength, fiber, and time-slot switching 5 . Some examples of GMPLS protocols are OSPF-TE, RSVP-TE, and LMP.  OSPF-TE is a routing protocol that advertises the topology and the link attributes of the network 6 . RSVP-TE is a signaling protocol that establishes, modifies, and releases LSPs. LMP is a link management protocol that verifies the connectivity and monitors the status of the links.  References :

4 : Source Frequency Definition (SFD) - ITU

5 : Generalized Multi-Protocol Label Switching - Wikipedia

6 : OSPF Extensions in Support of Generalized Multi-Protocol Label Switching (GMPLS) - RFC 4203

[7]: Generalized Multi-Protocol Label Switching (GMPLS) Signaling Resource Reservation Protocol-Traffic Engineering (RSVP-TE) Extensions - RFC 3473

[8]: Link Management Protocol (LMP) - RFC 4204

A network with ROADM GMPLS nodes and optical transponder connections could have both L0 and L1 restoration capabilities. L0 restoration refers to the ability of the network to recover from failures at the optical layer, such as fiber cuts or node failures, by rerouting the affected LSPs to alternative paths at the same layer. L0 restoration can be achieved by using GMPLS signaling protocols, such as RSVP-TE or CR-LDP, to establish backup LSPs in advance or on demand.  L0 restoration can provide fast recovery times and high availability for optical services 3 4 . L1 restoration refers to the ability of the network to recover from failures at the sub-wavelength layer, such as transponder failures or wavelength unavailability, by rerouting the affected LSPs to alternative paths at a higher layer. L1 restoration can be achieved by using GMPLS routing protocols, such as OSPF-TE or ISIS-TE, to advertise the sub-wavelength information and availability to other nodes in the network.  L1 restoration can provide more flexibility and efficiency for sub-wavelength services 5 6 .  References :

3 : GMPLS - Nokia

4 : Generalized Multi-Protocol Label Switching - Wikipedia

5 : Sub-Wavelength Switching - Nokia

6 : Sub-Wavelength Switching in Optical Networks - IEEE Xplore