Kyndryl Network Security Engineer Interview Questions and Answers for Experienced

Coding test contains 2 questions

Q1. What OSPF and its state and LSAs
Ans. 
OSPF (Open Shortest Path First) is a routing protocol used to determine the best path for data packets in a network.
• OSPF is a link-state routing protocol that uses Dijkstra's algorithm to calculate the shortest path to each network.

• OSPF routers exchange Link State Advertisements (LSAs) to build a topology database.

• There are several types of LSAs, including Router LSAs, Network LSAs, Summary LSAs, and AS External LSAs.

• O...read more
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Q2. VLAN and DTP, STP. RSTP, HSRP/VRRP protocols
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Q3. Etherchannel, EIGRP
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Q1. BGP and its states and attributes
Ans. 
BGP (Border Gateway Protocol) is a routing protocol used to exchange routing information between different autonomous systems.
• BGP has four main states: Idle, Connect, OpenSent, and Established.

• BGP attributes include AS_PATH, NEXT_HOP, LOCAL_PREF, and ORIGIN.

• AS_PATH attribute shows the path the route has taken through different autonomous systems.

• NEXT_HOP attribute specifies the next hop IP address to reach a particular...read more
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Q2. Monitoring tool
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Q1. Salary negotiation
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Q1. What is bgp and working
Ans. 
BGP (Border Gateway Protocol) is a routing protocol used to exchange routing information between different networks on the internet.
• BGP is used by internet service providers to make routing decisions.

• It operates on TCP port 179.

• BGP uses path attributes to determine the best route to a destination.

• BGP can be configured in different ways such as eBGP (external BGP) and iBGP (internal BGP).
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Q2. What was you network experience
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Q1. What is VRRP ?
Ans. 
VRRP stands for Virtual Router Redundancy Protocol, used to provide high availability for routers by creating a virtual IP address.
• VRRP allows multiple routers to work together in a group, with one router acting as the master and others as backups.

• If the master router fails, one of the backup routers takes over the virtual IP address to ensure continuous network connectivity.

• VRRP uses a priority value to determine whic...read more
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Q2. Why do we create VLAN?
Ans. 
VLANs are created to segment network traffic, improve network performance, enhance security, and simplify network management.
• Segment network traffic to improve performance and reduce congestion

• Enhance security by isolating sensitive data or devices

• Simplify network management by grouping devices logically

• Allow for easier troubleshooting and maintenance

• Enable better control over broadcast domains

• Example: Creating separat
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Q3. How do we configure FAILOVER via static Route?
Ans. 
Configuring FAILOVER via static Route involves setting up multiple routes with different priorities.
• Create multiple static routes with different next-hop IP addresses

• Assign different administrative distances to each static route

• Configure IP SLA to track the primary route and switch to the secondary route if the primary route fails
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Q1. What is osi model
Ans. 
The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.
• The OSI model stands for Open Systems Interconnection model.

• It helps in understanding how different networking protocols work together.

• Each layer in the OSI model has specific functions and communicates with adjacent layers.

• Examples of OSI model layers include physical layer, data link la
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Q2. It is reference model
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Q1. UST is good interviewer is not good
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Q2. Even we don't know the question atleast Interviewer required minimum patience .Iritating
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Q1. Basic question only OSPF
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Q2. Load balancer configuration
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Q1. OSPF, Load balancer
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Q2. Load balancing configuration
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