NTT Communications Network Engineer Interview Questions and Answers

Q1. What is IPRAN solution
Ans. 
IPRAN solution stands for Internet Protocol Radio Access Network, which is a network architecture that combines IP/MPLS and mobile technologies.
• IPRAN solution is used to provide high-speed internet access to mobile users.

• It helps in optimizing network resources and improving network performance.

• Examples of IPRAN solution providers include Cisco, Huawei, and Juniper Networks.
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Q2. What is the different types of L2VPN we have
Ans. 
Different types of L2VPN include Ethernet VPN (EVPN), Virtual Private LAN Service (VPLS), and Layer 2 Tunneling Protocol (L2TP).
• Ethernet VPN (EVPN) - Uses BGP as the control plane protocol for distributing MAC addresses across the network.

• Virtual Private LAN Service (VPLS) - Extends a LAN over the network, allowing multiple sites to appear as if they are on the same LAN segment.

• Layer 2 Tunneling Protocol (L2TP) - Creat...read more
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Q1. Volte call flow
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Q1. -tell us about yourself
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Q2. -what experience do u have as a network engineer
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Q3. What do you know about Huawei
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Q4. What is MPLS protocol and in what situations do we use it
Ans. 
MPLS (Multiprotocol Label Switching) is a protocol used in high-performance telecommunications networks to direct data packets along predefined paths.
• MPLS is used to improve network performance by efficiently routing data packets based on labels instead of IP addresses.

• It is commonly used in scenarios where quality of service (QoS) and traffic engineering are important, such as in large enterprise networks or service p...read more
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Q5. Explain the three different INTER_AS solutions their advantages and disadvantages
Ans. 
Three different INTER_AS solutions and their advantages and disadvantages
• Option 1: Option A - Advantages: Scalability, Disadvantages: Complexity

• Option 2: Option B - Advantages: Simplicity, Disadvantages: Limited scalability

• Option 3: Option C - Advantages: Flexibility, Disadvantages: Potential security risks
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It contains logical reasoning, quantitative aptitude, and technical questions

Q1. Technical questions based on networks
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Q1. Questions were based on wireless Communication
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The discussion is about the benefits and drawbacks of artificial intelligence and UPI payments.

Q1. They have asked Self introduction.
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Q2. The project's that I have worked on my final sem.
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Q3. The role and responsibilities that I have done in my previous internship.
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Q4. What are your strengths and weaknesses?
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Q5. What kind of compensation are you looking for?
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Q6. Where do you see yourself in five years?
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Q1. BGP Port number BGP states STP Nexus code upgrades VPC VDC
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Q1. Network flow in nexus switches vpc communication in nexus switches unable to ssh nexus
Ans. 
Network flow in Nexus switches involves understanding vPC communication and troubleshooting SSH connectivity issues.
• Network flow in Nexus switches involves the movement of data packets between devices connected to the switches.

• vPC (Virtual Port Channel) communication in Nexus switches allows for link aggregation and redundancy by combining multiple physical links into a single logical link.

• Troubleshooting SSH connectiv...read more
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Q1. How we Can Load balancing done
Ans. 
Load balancing can be done by distributing network traffic across multiple servers to ensure optimal resource utilization and prevent overload.
• Implementing a load balancer device or software

• Configuring load balancing algorithms such as round-robin, least connections, or IP hash

• Monitoring server health and adjusting traffic distribution accordingly

• Scaling resources up or down based on traffic demands
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Q2. How we can found the SD Congestion
Ans. 
SD Congestion can be found by monitoring network traffic, analyzing performance metrics, and identifying bottlenecks.
• Monitor network traffic using tools like Wireshark or NetFlow

• Analyze performance metrics such as latency, packet loss, and throughput

• Identify bottlenecks in the network infrastructure, such as overloaded switches or routers
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Q1. How we can remove External Interference
Ans. 
External interference can be removed by implementing shielding, using filters, adjusting frequencies, and improving signal strength.
• Implement shielding to block external signals from interfering with the network

• Use filters to eliminate unwanted frequencies that may cause interference

• Adjust frequencies to avoid overlapping with other nearby networks

• Improve signal strength to overcome interference from distant sources
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Q2. LTE Accessibility formula
Ans. 
LTE Accessibility formula calculates the probability of successful connection to the LTE network.
• LTE Accessibility = (RSRP - PL) - (UE Noise + Interference)

• RSRP: Reference Signal Received Power

• PL: Path Loss

• UE: User Equipment
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Q1. What is your CTC
Ans. 
My current CTC is $80,000 per year.
• My current CTC is $80,000 per year

• I am open to discussing salary expectations during the interview process

• I have experience negotiating salary based on skills and experience
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Q2. What is your Notice Period Time
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How does chatgpt work? describe tn, fn, tp, fp and what is the formula?