AT&T Network Security Engineer Interview Questions and Answers

Q1. Not Available, can't disclose
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Q1. Not Available, can't disclose.
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Q1. 4g architect and interphase used?
Ans. 
4G architecture includes radio access network (RAN), core network, and user equipment (UE) with interfaces like S1, X2, and LTE-Uu.
• 4G architecture consists of Radio Access Network (RAN), Core Network, and User Equipment (UE)

• Interfaces used in 4G architecture include S1, X2, and LTE-Uu

• RAN connects UE to the core network, while X2 is used for communication between base stations

• LTE-Uu is the air interface between UE and b
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Q2. Regarding throughput and sinr degradation how to improve?
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Q3. How to calculate PRB?
Ans. 
PRB can be calculated by dividing the total available bandwidth by the bandwidth per PRB.
• Calculate total available bandwidth

• Determine the bandwidth per PRB

• Divide total available bandwidth by bandwidth per PRB to get the number of PRBs
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Q4. OSS kpi knowledge?
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Q1. Regarding subnetting
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Q1. Regarding all networking
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Q1. Personal details
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Q1. Self interduction
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Q2. Pervious company experience
Ans. 
Worked as a Network Engineer at XYZ Company for 3 years.
• Managed and maintained network infrastructure

• Configured routers, switches, and firewalls

• Troubleshooted network issues and implemented solutions

• Collaborated with cross-functional teams for project implementations
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Q1. Fiber colour coding
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Q2. Splicing lan colour coding
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Q1. Salary discussion
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Q1. What is ECI MUX and ECI Alarm ?
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Q2. What is SDH card and MUX ?
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Network related questions

Q1. What is salary expectation?
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Q2. Document verification
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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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