Senior NOC Engineer
10+ Senior NOC Engineer Interview Questions and Answers
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Q1. What else you troubleshoot in data centre?
Apart from network issues, I troubleshoot server hardware, storage, power, cooling, and security in data centre.
Server hardware issues such as failed hard drives, RAM, or CPU
Storage issues such as disk space, RAID failures, or SAN connectivity
Power and cooling issues such as UPS failures, overheating, or HVAC problems
Security issues such as unauthorized access, firewall misconfigurations, or DDoS attacks
Q2. What is your understanding of Local Area Networks (LAN) and Wide Area Networks (WAN)?
LAN is a network that connects devices within a limited area, while WAN connects devices over a larger geographical area.
LAN is typically used in homes, offices, or small businesses to connect devices like computers, printers, and servers.
WAN connects LANs in different locations, such as connecting offices in different cities or countries.
LANs are usually faster and have lower latency compared to WANs due to the smaller geographical area.
Examples of LAN technologies include E...read more
Senior NOC Engineer Interview Questions and Answers for Freshers
Q3. What you do in Linux environment?
I work with Linux servers, managing and troubleshooting them.
Install and configure Linux servers
Monitor server performance and troubleshoot issues
Manage user accounts and permissions
Automate tasks with shell scripting
Implement security measures
Install and configure software applications
Maintain backups and disaster recovery plans
Q4. Monitoring of Linux servers and doing patching works.
Monitoring and patching of Linux servers is crucial for maintaining their security and stability.
Regularly monitor server logs and performance metrics to identify any issues or vulnerabilities.
Stay up-to-date with security patches and updates, and schedule regular maintenance windows for patching.
Test patches in a non-production environment before applying them to production servers.
Use automation tools like Ansible or Puppet to streamline patching and configuration managemen...read more
Q5. what is OSI model. What is VLAN VTP STP BGP OSPF EIGRP
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 Protocol) is a routing protocol used to exchange routing ...read more
Q6. What is BGp? And it's attributes
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_PATH attribute contains the list of autonomous systems that ...read more
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Q7. What are load balancing network devices?
Load balancing network devices distribute network traffic across multiple servers to prevent overload and improve performance.
Load balancers can be hardware or software-based
They help optimize resource utilization and ensure high availability
Common examples include F5 BIG-IP, Citrix NetScaler, and NGINX
They can use various algorithms like round-robin, least connections, and IP hash
Q8. What is STP and it'spec.
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 Spanning Tree Protocol)
Q9. Whatisospf andit's states
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
Q10. What is the VTP?
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 clients in the same VTP domain.
VTP version 3 supports enhanced...read more
Q11. Tell about vlan
VLAN stands for Virtual Local Area Network, used to logically segment a network.
VLANs help in improving network performance and security by isolating traffic.
They allow multiple networks to coexist on the same physical infrastructure.
VLANs are configured at the switch level and can span multiple switches.
Each VLAN has its own broadcast domain, reducing unnecessary network traffic.
VLANs are identified by a VLAN ID (VID) which is a number between 1 and 4096.
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