BT E Serv Service Reliability Engineer Interview Questions and Answers

General aptitude questions

Q1. Questions based on resume
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Q1. More based on resume but from managers
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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
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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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Normal mathematics and some technical

Q1. Mostly questions from switching and RaN tolls ,LSMR
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Q2. Function of Router. Process of switch configuration
Ans. 
Router functions to route data packets between different networks. Switch configuration involves setting up ports, VLANs, and security settings.
• Router functions include routing data packets between networks, determining the best path for data transmission, and providing network security.

• Switch configuration involves setting up ports, VLANs (Virtual Local Area Networks), and security settings to control traffic flow wit...read more
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Q1. What is VPN? How it works?
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VPN stands for Virtual Private Network. It allows users to securely access a private network over a public network.
• VPN creates a secure and encrypted connection between the user's device and the private network

• It masks the user's IP address and encrypts data to ensure privacy and security

• Common types of VPN include SSL VPN, IPsec VPN, and PPTP VPN

• VPN can be used to access company networks remotely, bypass geo-restricti
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Q2. What is BGP and OSPF?
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BGP (Border Gateway Protocol) is an exterior gateway protocol used to route traffic between different autonomous systems. OSPF (Open Shortest Path First) is an interior gateway protocol used to route traffic within a single autonomous system.
• BGP is used to connect different autonomous systems and make routing decisions based on network policies.

• OSPF is used within a single autonomous system to determine the best path f...read more
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Q1. What is rating of llop
Ans. 
The rating of llop refers to the Load Line Operating Power of a network device.
• Rating of llop is a measure of the maximum power a network device can operate at.

• It is important for ensuring the device does not exceed its power limits.

• For example, a switch may have a rating of llop of 250W, meaning it can operate at a maximum power of 250 watts.
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Q2. How many max sectors run on tower
Ans. 
The maximum number of sectors that can run on a tower depends on various factors such as tower capacity, network traffic, and hardware specifications.
• The maximum number of sectors that can run on a tower is typically determined by the tower's capacity and the network traffic it needs to handle.

• Factors such as hardware specifications, signal strength, and interference can also impact the maximum number of sectors that c...read more
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