AT&T Senior Network Architect Interview Questions and Answers

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
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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
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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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Q1. What is BGP? What is spilit horizon rule? How you configure BGP route reflector? Tell BGP path selection algorithm? ebgp multihop concept? OSPF LSA types and descriptions? How to redistribute OSPF into BGP...read more
Ans. 
BGP is a routing protocol used to exchange routing information between different autonomous systems. It uses path vector algorithm.
• Split horizon rule prevents a router from advertising a route back to the same interface from which it was learned.

• BGP route reflector is configured by defining a cluster ID and selecting reflector clients.

• BGP path selection algorithm selects the best path based on attributes like AS path l...read more
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Q2. Switching STP HSRP VLAN RSTP BPDU guard vs BPDU filter
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Explanation of STP, HSRP, VLAN, RSTP, BPDU guard and BPDU filter in network switching.
• STP (Spanning Tree Protocol) is used to prevent loops in a network by blocking redundant paths.

• HSRP (Hot Standby Router Protocol) provides redundancy for IP networks by allowing multiple routers to share a virtual IP address.

• VLAN (Virtual Local Area Network) is a logical grouping of devices on a network, allowing for better network ma...read more
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Q1. How to do load balancing? What are the parameters, How to improve verious KPi, Like VDR, HOSR Initial ERAB, CQI,SSSR
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Load balancing involves distributing network traffic across multiple servers to optimize resource utilization and prevent overload.
• Parameters for load balancing include server health, server capacity, and current network traffic.

• To improve various KPIs like VDR, HOSR, Initial ERAB, CQI, and SSSR, you can adjust load balancing algorithms, optimize server performance, and monitor network traffic.

• For example, you can use ...read more
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Q1. Salary expectation. Perks and benefits
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