NOC Technician Monitoring the Networks – Interview Questions/Service Knowledge
What do a NOC technician/engineer monitor with a typical NOC?
A Network Operations Center aka NOC technician monitor complex network components and are responsible for network management. They solve problems every day. The work of a NOC technician includes maintenance of networks, servers, and communications equipment within the organization.
Specifically, the NOC is the central location for IT support technicians to manage, monitor, repair, and maintain their customer networks. The NOC uses software to assist in network management.
Interview Questions and Answers for the Best NOC Technician
A NOC technician is responsible for monitoring the network 24 hours a day, 7 days a week to prevent interruptions. The following are maintenance questions for a NOC technician regarding network monitoring.
What is a proxy?
Proxy servers are designed to filter network traffic to prevent access to specific websites and allow you to monitor your web activity. The proxy server can also hide the source IP of the external network. For example; in a business environment, your computer’s IP address is unique to your local network, but the Internet recognizes different IP addresses used by proxy servers. What do you think is the problem, assuming you can’t access the host computer via the host name’s local network, but via the IP address?
To see the answer to this question, you can go to another question and show how to solve the problem. However, this issue may be due to Domain Name System (DNS) settings. In most cases, the hostname is not added to the DNA server, so the network does not know the hostname, but the location of the IP address.
What is DNA?
DNS stands for Domain Name System and provides a database associated with various information related to domain entities. For example, a computer connected to a physical network has an IP address, which is translated into a hostname by a DNS server. Instead of entering an IP address to reach a computer on your network, just remember the hostname and DNS will handle the routing for you. This is how the site is named …
What is a network switch?
A network switch is a device that creates a network where multiple devices are connected and share data. This is achieved by receiving, processing, and forwarding data in the form of data packets.
How do you find the uptime of your Cisco switch/router?
If you use a CLI SSH / Telnet session, you can use the shfar command to display the time. What if you can’t solve the problem?
In this case, the interviewer will ask again if you are a team player. So the correct answer is to ask someone else in the group for help.
Could you explain about the 3-way handshake?
- The client sends a synchronization request (SYN)
- The server responds with synchronization requests and acknowledgments (SYN, ACK)
- We would like to express our gratitude to our customers. (ACK)
What is trunking?
Trunking is a network system that provides access to multiple clients/clients without having to make individual connections for each (telephony). For example, an enterprise has multiple telephone lines connected to a backbone connection.
Have you ever had a situation where you needed to decide that you were at high risk of failure?
You can answer this question with an example from your personal experience. In other words, you may have solved an issue that required a major system change or configuration. Of course, your answer is different from others.
Do you know what EIGRP convergence time is?
Convergence time, also known as the internal gateway’s extended routing protocol, is the amount of time a router considers a live host without receiving data packets. In most cases, the duration is three times the hello interval, the standard 15 and 180 seconds. The settings can be adjusted within the router.
Thank you for reading this post. Please note that it is not possible to know exactly what questions will be asked during the interview. The key is to get a quick update of the knowledge that provides the confidence and support you need for your interview.
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