basic noc interview questions

Have an opportunity to interview for a NOC tech role in a local company. Im fine with brushing up on my network fundamentals, but wondered what areas I should focus on.

Im assuming OSI model or maybe DNS would be standard stuff, but this is my first attempt at a role of this type since getting my degree. I want to be properly prepared.

Interview Questions for NOC Engineers:
  • What inspired you to become a NOC engineer? …
  • What networking and hardware systems are you most familiar with? …
  • What automated systems should be implemented to diagnose network errors? …
  • How would you deal with a major network failure across multiple IT systems?

Also known as Enhanced Interior Gateway Routing Protocol convergence time refers to how long a router will consider a host alive without receiving any data packets. In most cases the hold time is set to three times the hello interval, by default, 15 seconds and 180 seconds. The settings can be adjusted from within the router.

12. If you came across a situation in which you could not resolve an issue, what would you do?

This is your last chance to talk about your experience and qualifications in order to get this awesome job. Feel free revisit the first question asking about yourself.

DNS stands for Domain Name System and it provides a database association with various information related to domain entities. For example, a computer attached on physical network will have a an IP address which is then translated to a host name by DNS server. Instead of typing out an IP Address to reach a computer on the network you can simply remember the host name and DNS will handle the routing. This is how website names work…

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List of NOC Engineer Interview Questions –

Get equipped with the best set of questions asked for NOC Engineer interview in 2020 –

Have an opportunity to interview for a NOC tech role in a local company. Im fine with brushing up on my network fundamentals, but wondered what areas I should focus on.

Im assuming OSI model or maybe DNS would be standard stuff, but this is my first attempt at a role of this type since getting my degree. I want to be properly prepared.

Get Answers here – NOC Engineer Interview Q&A

  • Name the feature offered by a Cisco Firewall to shield the network against TCP Syn Flood Attacks.
  • Name the feature on a firewall that can be used to block a website or a specific URL.
  • Name a security solution that can be configured to assign User Based Authentication to the users on a LAN Network.
  • There is a requirement to setup virtual private network (VPN) for remote users. Following are the key objectives –
    • Users in roaming across other customer locations require this service
    • The VPN gateway should require the use of Internet Protocol Security (IPSec).
    • All remote users must use IPSec to connect to the VPN gateway.

    Which IPSec mode should you use?

  • Name the command used to determine connectivity between client and server.
  • What do you understand by default time-frame of Ping Timeout on Windows system?
  • How is the traceroute function different on Linux/Unix and on Windows?
  • What do you understand by ‘nslookup’ function tool?
  • What will you do in a situation where WAN Link of the Router goes down?
  • Please explain what so you understand by the term BGP?
  • How do you plan to resolve a BGP neighbour issue when “hold time expired” notification is displayed?
  • As NOC analyst, how can one access a layer 2 switch right from a remote location?
  • What is the implication of variable IP-OSPF-Transmit-Delay?
  • Define what do you understand by TCP/IP?
  • What do you understand by the term VLAN?
  • Define the term ‘Proxy’.
  • Suppose a host computer fails to reach over a local network with the host name but successfully reach it by an IP address, where do you think the problem persists?
  • What do you understand by the term DNS?
  • What do you understand by the term ‘Network Switch’?
  • As NOC monitoring and analyst, how would you track the up time in Cisco router/switch?
  • What do you understand by default gateway IP?
  • What do you understand by the term ‘Trunking’?
  • Which are the 3 key layers of fiber optic?
  • What do you know about EIGRP Convergence Time?
  • How can we verify the delay and routing of packets between the two locations?
  • How can you determine which PC and what Port number is it connected to a network switch?
  • Suppose the WAN link of a router goes down, and you are not receiving any notification or alert regarding the same. What could be the problem behind it?
  • One of the ports in 8 port EtherChannel goes down. What will happen?
  • How can you troubleshoot the problem of a high CPU utilization existing in a router?
  • Is attaining CRC errors over MPLS WAN Links a routine thing?
  • Define Route Poisoning.
  • Please define the steps of a 3 Way Handshake.
  • Define WHOIS command and its usage.
  • What is the key utilization of Nbtstat command?
  • What do you understand by the log message- “%OSPF-5-NBRSTATE: ospf-1 [5330] Process 1, Nbr 10.3.3.14 on Vlan44 from FULL to EXSTART, BADSEQNUM OSPF” ?
  • What is required to be done, if my BGP neighbour is in active state or stuck in idle?
  • In order to make decisions, which of the fields in a packet does a Network Layer Firewall refer to?
  • Name the main field within an IP Header modified by NAT Firewall using NAT overload.
  • What is the process of performing Password Recovery within a Switch?
  • In which layer of the OSI model, a gateway functions?
  • How many layers are present in the OSI reference model? Also mention the names.
  • What is the difference between the terms ‘forward lookup’ and ‘reverse lookup’ within DNS?
  • What do you understand by the term ‘cross cable’?
  • What is the meaning of MTTR and MTBF?
  • What do you understand by the term ‘backbone network’?
  • Define a router and its basic roles?
  • Mention the criteria meant for best path selection in a router?
  • What do you understand by the term ‘anonymous FTP’?
  • How would you differentiate ‘standard’ and ‘extended’ ACL (access control list) from one another?
  • What do you understand by NIC?
  • FAQ

    What do you need to work at a NOC?

    The NOC engineer monitors and executes the daily operational activities needed to manage IT services and the supporting IT infrastructure. According to Job Hero, a NOC engineer monitors large computer networks and servers for problems from a central location or remotely.

    What are the responsibilities of NOC engineer?

    Employers look for NOC engineers to possess either an associate’s or bachelor’s degree in network operations, information technology, computer science or other related fields. Companies will also hire individuals with certifications and hands-on experience.

    What is NOC position?

    NOC Engineer Responsibilities:
    • Deploying and inspecting IT network systems.
    • Overseeing the safe installation of hardware and cabling systems.
    • Monitoring the performance and capacity of computer systems.
    • Performing regular checks on network hardware and software.
    • Responding to network alerts and hardware malfunctions.

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