Logicworks Senior NOC Engineer Interview Questions and Answers

The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.

• VLAN stands for Virtual Local Area Network and is used to segment network traffic.

• VTP (VLAN Trunking Protocol) is a Cisco proprietary protocol used to manage VLAN configurations across a network.

• STP (Spanning Tree Protocol) is used to prevent loops in Ethernet networks.

• BGP (Border Gateway...read more

STP stands for Spanning Tree Protocol. It is a network protocol that ensures a loop-free topology for Ethernet networks.

• STP prevents loops in Ethernet networks by blocking redundant paths

• It elects a root bridge to serve as the central point in the network

• STP uses Bridge Protocol Data Units (BPDUs) to exchange information between switches

• Common variants include RSTP (Rapid Spanning Tree Protocol) and MSTP (Multiple Span...read more

VTP stands for VLAN Trunking Protocol, used in Cisco networks to manage VLAN configurations across multiple switches.

• VTP is used to synchronize VLAN information across a network of Cisco switches.

• It helps in reducing the administrative overhead of manually configuring VLANs on each switch.

• VTP operates in client, server, and transparent modes.

• Changes made to VLAN configurations on a VTP server are propagated to VTP clie...read more

BGP (Border Gateway Protocol) is a standardized exterior gateway protocol used to exchange routing information between different autonomous systems on the internet.

• BGP is a path vector protocol that uses TCP as its transport protocol.

• It is used to make routing decisions based on network policies, rules, and attributes.

• BGP attributes include AS_PATH, NEXT_HOP, LOCAL_PREF, MED (Multi-Exit Discriminator), and WEIGHT.

• AS_PA...read more

OSPF (Open Shortest Path First) is a routing protocol used to determine the best path for data packets in a network.

• OSPF is a link-state routing protocol

• It uses Dijkstra's algorithm to calculate the shortest path

• OSPF routers exchange link-state advertisements (LSAs)

• OSPF has different states: Down, Init, 2-Way, Exstart, Exchange, Loading, Full