10+ Engineer - Network Operations Interview Questions and Answers

Diagnosing a STP loop in a switches network involves checking for redundant links, analyzing STP configurations, and using network monitoring tools.

• Check for redundant links in the network that may be causing the loop.

• Analyze the STP configurations on the switches to ensure proper settings and priorities.

• Use network monitoring tools to identify the source of the loop and isolate the affected switches.

• Implement loop prevention mechanisms such as BPDU guard or root guard to avo...read more

To troubleshoot a failed BGP session, check the configuration, verify connectivity, analyze logs, and check for any network issues.

• Check BGP configuration for any errors or misconfigurations

• Verify connectivity between the BGP peers

• Analyze BGP logs for any error messages or warnings

• Check for any network issues such as routing problems or firewall blocking BGP traffic

To troubleshoot OSPF neighbors stuck in Exstart state, check for mismatched parameters, network connectivity issues, and potential network congestion.

• Verify OSPF parameters such as area ID, network type, and authentication match on both neighbors

• Check for network connectivity issues such as firewall blocking OSPF traffic or physical link problems

• Investigate potential network congestion causing packets to be dropped or delayed

• Review OSPF neighbor logs and debug output for more...read more

Multitasking is executing multiple tasks simultaneously while multithreading is executing multiple threads within a single process.

• Multitasking involves running multiple processes at the same time while multithreading involves running multiple threads within a single process.

• Multitasking requires more resources than multithreading.

• Multithreading is more efficient than multitasking as it reduces the overhead of context switching.

• Examples of multitasking include running multipl...read more

To resolve a switch problem, identify the issue, troubleshoot, and apply appropriate solutions.

• Identify the specific problem with the switch

• Check for physical connectivity issues

• Verify switch configuration and settings

• Restart or reset the switch if necessary

• Update firmware or software if outdated

• Replace faulty hardware components if needed

MPLS Network is a protocol for efficient packet forwarding in telecommunications networks.

• MPLS stands for Multiprotocol Label Switching

• It is used to direct data packets along predefined paths through the network

• MPLS labels are added to packets to determine the best path for forwarding

• It improves network performance and efficiency by reducing congestion and improving traffic flow

• Commonly used in large-scale networks like ISPs and enterprise networks

Topologies refer to the physical or logical arrangement of network devices.

• Common topologies include bus, star, ring, mesh, and hybrid.

• Bus topology connects all devices to a single cable.

• Star topology connects all devices to a central hub.

• Ring topology connects devices in a circular chain.

• Mesh topology connects devices to each other in a network of interconnections.

• Hybrid topology combines two or more topologies.

• Topologies can affect network performance, scalability, and faul...read more

OSI layers are a conceptual model that describes the communication functions of a network.

• OSI stands for Open Systems Interconnection.

• There are 7 layers in the OSI model.

• Each layer has a specific function and communicates with the layers above and below it.

• The layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Examples of protocols at each layer include Ethernet at the Data Link layer and HTTP at the Application layer.

Create a Bash script to automate a network operation task.

• Use variables to store data

• Use loops for repetitive tasks

• Use conditional statements for decision making

• Utilize functions for modular code

• Handle errors and exceptions gracefully