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AT&T Network Security Engineer Interview Questions and Answers

Updated 30 Sep 2021

AT&T Network Security Engineer Interview Experiences

1 interview found

I applied via Naukri.com and was interviewed in Mar 2021. There were 3 interview rounds.

Interview Questionnaire 

4 Questions

  • Q1. What is difference between phase of site to site vpn?
  • Ans. 

    The phases of site-to-site VPN are the steps involved in establishing and maintaining a secure connection between two networks.

    • Phase 1: Authentication and key exchange

    • Phase 2: Data encryption and tunnel establishment

    • Phase 3: Traffic protection and monitoring

    • Each phase has its own set of protocols and processes

    • For example, in Phase 1, the VPN peers authenticate each other using methods like pre-shared keys or digital ce

  • Answered by AI
  • Q2. What is NAT?
  • Ans. 

    NAT stands for Network Address Translation. It is a technique used to map a public IP address to a private IP address.

    • NAT is used to conserve public IP addresses.

    • It allows multiple devices to share a single public IP address.

    • NAT can be implemented using hardware or software.

    • There are three types of NAT: Static NAT, Dynamic NAT, and Port Address Translation (PAT).

  • Answered by AI
  • Q3. What know about BGP?
  • Ans. 

    BGP stands for Border Gateway Protocol, a routing protocol used to exchange routing information between different networks.

    • BGP is used to connect different autonomous systems (AS) on the internet.

    • It is a path-vector protocol that selects the best path for data to travel based on various attributes.

    • BGP is used by internet service providers (ISPs) to exchange routing information with each other.

    • It is a complex protocol t...

  • Answered by AI
  • Q4. Some situations based questions

Interview Preparation Tips

Interview preparation tips for other job seekers - Be prepared first basic fundamentals

Skills evaluated in this interview

Interview questions from similar companies

I appeared for an interview in Jan 2017.

Interview Preparation Tips

Round: Test
Duration: 30 minutes
Total Questions: 20

College Name: Jaypee University Of Information Technology, Solan

I applied via Campus Placement and was interviewed before Feb 2021. There were 2 interview rounds.

Round 1 - Aptitude Test 

Basic addition and subtraction

Round 2 - HR 

(1 Question)

  • Q1. Tell me about yourself.

Interview Preparation Tips

Interview preparation tips for other job seekers - Entry level questions and nothing

I applied via Recruitment Consultant and was interviewed before Jan 2020. There were 3 interview rounds.

Interview Questionnaire 

3 Questions

  • Q1. How you handle a situation which Is about to escalate and beyond your capabilities?
  • Q2. What is your greatest failure of life. How you overcome it?
  • Q3. How do you adapt to changes?

Interview Preparation Tips

Interview preparation tips for other job seekers - Interviewer need to assess candidates as per below:
1) Attitude
2) Flexibility
3) Knowledge

Interview Questionnaire 

5 Questions

  • Q1. Tell me about yourself?
  • Ans. 

    I am a dedicated network engineer with 5 years of experience in designing, implementing, and troubleshooting complex network infrastructures.

    • Experienced in configuring routers, switches, firewalls, and load balancers

    • Skilled in network security protocols such as VPNs, ACLs, and IDS/IPS

    • Proficient in network monitoring tools like Wireshark and Nagios

    • Certified in Cisco CCNA and CCNP

  • Answered by AI
  • Q2. What is OFC?
  • Ans. 

    OFC stands for Optical Fiber Cable, which is a type of cable made of glass or plastic fibers that transmit data using light.

    • OFC is used for high-speed data transmission over long distances.

    • It is commonly used in telecommunications, internet, and cable TV networks.

    • OFC is more reliable and has higher bandwidth than traditional copper cables.

    • Examples of OFC include single-mode fiber and multi-mode fiber.

    • OFC requires speci...

  • Answered by AI
  • Q3. What is multiplexer and de multiplexer?
  • Ans. 

    Multiplexer is a device that combines multiple signals into one signal. Demultiplexer is a device that separates one signal into multiple signals.

    • Multiplexer is also known as MUX.

    • It is used to increase the capacity of a communication channel.

    • Demultiplexer is also known as DEMUX.

    • It is used to route a single input signal to multiple output signals.

    • Multiplexer and demultiplexer are commonly used in digital communication s...

  • Answered by AI
  • Q4. What is OTDR?
  • Ans. 

    OTDR stands for Optical Time Domain Reflectometer. It is a device used to test and troubleshoot fiber optic networks.

    • OTDR sends a pulse of light into the fiber and measures the time and strength of the reflected signal.

    • It can detect faults such as breaks, bends, and splices in the fiber.

    • OTDR can also measure the length of the fiber and the attenuation of the signal.

    • It is an essential tool for maintaining and repairing ...

  • Answered by AI
  • Q5. Why Should we hire you?
  • Ans. 

    I have a strong technical background, excellent problem-solving skills, and a proven track record of successfully implementing network solutions.

    • Extensive experience in designing, implementing, and managing complex network infrastructures

    • Strong knowledge of network protocols and technologies such as TCP/IP, VLANs, and routing protocols

    • Proven ability to troubleshoot network issues and implement effective solutions

    • Excell...

  • Answered by AI

Interview Preparation Tips

Round: Resume Shortlist
Experience: B.Tech in Ece

Skills evaluated in this interview

Interview Questionnaire 

1 Question

  • Q1. Firewall, routing and switching, data centre topics

I applied via Apna Jobs and was interviewed before Oct 2021. There were 2 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. Tell me about yourself?
  • Q2. What is your ambition?

Interview Preparation Tips

Interview preparation tips for other job seekers - Be confidant. They are asking about your technical knowledge. Thats it.

I appeared for an interview in Nov 2016.

Interview Preparation Tips

Round: Resume Shortlist
Experience: I was asked to submit my r

Network Engineer Interview Questions & Answers

Bharti Airtel user image Harpreet Singh Hoshiarpur

posted on 27 Apr 2022

I applied via Walk-in and was interviewed before Apr 2021. There were 2 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips
Round 2 - One-on-one 

(2 Questions)

  • Q1. Study OSPF deeply, questions like: 1. OSPF Neighbor States and their functions. 2. If OSPF neighborhship stuck in Exstart state, what would be the reason ? 3. Purpose of DR/BDR ? 4. Packet types (LSR/LSU/L...
  • Q2. Study MPLS deeply: 1. What is MPLS ? 2. Purpose of MPLS ? 3. What is LDP and its working ? 4. CEF ? 5. MP-BGP 6. MPLS-VPN 7. VRF/RT/RD ? 8. Types and uses of labels ? 9. MPLS Traffic flow ? 10. MPLS heade...
  • Ans. 

    MPLS is a protocol used to efficiently route network traffic by assigning labels to packets.

    • MPLS stands for Multiprotocol Label Switching

    • It is used to improve network performance and reduce congestion

    • LDP (Label Distribution Protocol) is used to distribute labels to network devices

    • CEF (Cisco Express Forwarding) is a fast switching technology used in MPLS networks

    • MP-BGP (Multiprotocol Border Gateway Protocol) is used to ...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Study well and be consistent and confident, by doing this you can crack any interview.

Skills evaluated in this interview

I applied via Indeed and was interviewed before Jun 2020. There was 1 interview round.

Interview Questionnaire 

1 Question

  • Q1. BGP, OSPF

Interview Preparation Tips

Interview preparation tips for other job seekers - fully technical and best iterviewer are there.
attend only if you have very good knowledge...

AT&T Interview FAQs

What are the top questions asked in AT&T Network Security Engineer interview?

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AT&T Network Security Engineer Salary
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₹2.2 L/yr - ₹15.5 L/yr
14% more than the average Network Security Engineer Salary in India
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