V5 Global Services Network Engineer Interview Questions and Answers

The 5 layers of OSS are: Business Process Layer, Service Layer, Resource Layer, Network Element Layer, and Physical Layer.

• Business Process Layer: Manages the overall operation and coordination of OSS functions.

• Service Layer: Handles service provisioning, activation, and management.

• Resource Layer: Manages network resources such as routers, switches, and servers.

• Network Element Layer: Controls individual network elements...read more

NMS stands for Network Management System. It is a software platform used to monitor, control, and manage network devices and infrastructure.

• NMS provides real-time monitoring of network performance, availability, and security.

• It allows network administrators to configure and manage network devices remotely.

• NMS collects and analyzes network data to identify and troubleshoot issues.

• It can generate reports and alerts for n...read more

RDR (Route Distinguisher) is a mechanism used in MPLS networks to uniquely identify VPN routes.

• RDR is used in MPLS VPN networks to distinguish between routes belonging to different VPNs.

• It is a 64-bit value added to the IPv4 or IPv6 prefix to create a unique VPN route.

• RDR is typically configured on the PE (Provider Edge) routers in the MPLS network.

• It allows the PE routers to correctly identify and forward traffic to t...read more

STP (Spanning Tree Protocol) in switching is a network protocol that ensures a loop-free topology for Ethernet networks.

• STP prevents loops in Ethernet networks by blocking redundant paths

• It selects a root bridge to be the central point of the network

• STP calculates the shortest path to the root bridge for each switch port

• If a link fails, STP reconverges to find a new path without loops

The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven abstraction layers.

• The OSI model consists of seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has specific functions and interacts with adjacent layers to provide end-to-end communication.

• For example, the Phys...read more

iBgp is used within an autonomous system while eBgp is used between different autonomous systems.

• iBgp is used for internal routing within an autonomous system.

• eBgp is used for external routing between different autonomous systems.

• iBgp typically has a higher administrative distance than eBgp.

• iBgp peers are typically within the same AS, while eBgp peers are in different ASes.