EPAM Systems Senior Network Security Engineer Interview Questions and Answers

Q1. What is DNS please explain
Ans. 
DNS stands for Domain Name System, which translates domain names to IP addresses.
• DNS is like a phone book for the internet, translating human-readable domain names (like google.com) to IP addresses (like 172.217.3.206).

• It helps users access websites by typing in easy-to-remember domain names instead of complex IP addresses.

• DNS servers store records of domain names and their corresponding IP addresses, allowing for effi...read more
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Q2. What is DHCP please explain
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DHCP stands for Dynamic Host Configuration Protocol, used to automatically assign IP addresses to devices on a network.
• DHCP eliminates the need for manual IP address configuration on each device

• It assigns IP addresses dynamically, allowing for efficient use of available addresses

• DHCP servers lease IP addresses to devices for a specific period of time

• DHCP also provides other network configuration information, such as su...read more
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Q1. Switching protocols port details
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Q2. Routung protocols and port details
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Q1. Basic OSI, TCP,
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Q2. DhCP dns working
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Q1. What is Routing
Ans. 
Routing is the process of selecting the best path for network traffic to reach its destination.
• Routing involves determining the optimal path for data packets to travel from the source to the destination.

• Routers use routing tables to make decisions on how to forward packets based on destination IP addresses.

• Routing protocols like OSPF and BGP help routers communicate and exchange routing information.

• Dynamic routing allo...read more
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Q2. What is Networking
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Networking is the practice of connecting computers and other devices to share resources and information.
• Networking involves connecting devices together to share resources such as files, printers, and internet access.

• It allows for communication between devices through protocols like TCP/IP.

• Networks can be wired or wireless, with examples including Ethernet, Wi-Fi, and Bluetooth.

• Networking also includes setting up securi...read more
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TroubleshootinG Network WAN-O&M

Q1. Introduction of myself
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Q2. Difference between c and c++
Ans. 
C is a procedural programming language while C++ is an object-oriented programming language.
• C is a procedural programming language, while C++ is a combination of procedural and object-oriented programming.

• C does not support classes and objects, while C++ does.

• C is a subset of C++, meaning all valid C programs are also valid C++ programs.

• C++ has additional features like function overloading, templates, and exception han
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Q1. Question related to retention
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Q2. Question related to aspirations
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Q1. Network related queries
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Q2. Network switch issue
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The network switch issue can be caused by various factors such as hardware failure, configuration errors, or network congestion.
• Check the switch logs for any error messages

• Verify the switch configuration and ensure it is correct

• Check the network traffic and identify any congestion issues

• Perform hardware diagnostics to identify any faulty components

• Consider upgrading the switch firmware or hardware if necessary
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Q1. Basics of networking
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Q2. 3 tier architecture
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