Tech Mahindra Senior Network Security Engineer Interview Questions and Answers

Q1. Traffic flow of Firewall
Ans. 
Firewall traffic flow refers to the movement of data packets through the firewall based on defined rules and policies.
• Firewall inspects incoming and outgoing traffic to determine if it should be allowed or blocked

• Traffic flow can be controlled using access control lists (ACLs) and security policies

• Firewall can also perform Network Address Translation (NAT) to hide internal IP addresses

• Examples of traffic flow include a...read more
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Q2. Architecture of Firewall
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Firewall architecture involves packet filtering, stateful inspection, and application layer filtering to protect networks.
• Firewall acts as a barrier between internal network and external network

• Packet filtering examines packets based on predefined rules to allow or block traffic

• Stateful inspection tracks the state of active connections to make decisions on allowing or blocking traffic

• Application layer filtering inspect...read more
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Q1. Situation based questions
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Q2. Escalation and P1 cases handled
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Q1. Reason for change
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I am seeking new challenges and opportunities for growth in my career.
• Seeking new challenges to expand my skills and knowledge

• Opportunities for career growth and advancement

• Desire for a change in work environment or company culture
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Q2. Salary expectation
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Q1. Explain the role of Virtual router and virtual system
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Virtual router and virtual system play a crucial role in network security by providing isolated environments for routing and security policies.
• Virtual router is a software-based routing instance that operates within a virtualized environment.

• Virtual system is a logical division of a physical firewall that allows for separate security policies and configurations.

• Both virtual router and virtual system help in creating is...read more
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Q2. What is app-id, content-id
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App-ID and Content-ID are features used in network security to identify and control applications and content.
• App-ID is used to identify applications based on their behavior, not just port and protocol

• Content-ID is used to identify and control content within applications

• Both features are commonly used in next-generation firewalls for advanced security policies

• Example: App-ID can identify and block social media applicati...read more
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Q1. What is U-turn Nat
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U-turn NAT is a network configuration where traffic enters and exits the same interface on a network device.
• U-turn NAT is also known as hairpin NAT or NAT loopback.

• It allows internal hosts to access resources using their public IP address from within the same network.

• This is commonly used in scenarios where internal hosts need to access a server using its public IP address.

• U-turn NAT can be configured on firewalls or r
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Q2. What is service route
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A service route is the path that a service takes to reach its destination, including all the network devices it passes through.
• Service routes can include routers, switches, firewalls, and other network devices.

• Understanding service routes is important for network security to identify potential vulnerabilities or points of failure.

• Examples of service routes include the path an email takes from sender to recipient, or th...read more
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Q3. What is wildfire
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Wildfire is a type of malware analysis service provided by Palo Alto Networks.
• Malware analysis service

• Identifies and blocks unknown threats in real-time

• Utilizes machine learning and AI for threat detection
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It is online test. In this test there is question of apti and also coding and from 5g question.

There are two questions asked and time is enough to solve 60 minutes

Q1. Wap for palindrome number
Ans. 
A palindrome number is a number that remains the same when its digits are reversed.
• Convert the number to a string

• Reverse the string

• Check if the reversed string is equal to the original string
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Q2. Add two numbers by function
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Create a function to add two numbers
• Define a function that takes two parameters as input

• Inside the function, add the two numbers together and return the result

• Example: function addNumbers(num1, num2) { return num1 + num2; }
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Q3. Write a code for Binary search
Ans. 
Binary search code implementation in Python
• Define a function that takes a sorted array and a target value as input

• Initialize two pointers, low and high, to the start and end of the array respectively

• While low is less than or equal to high, calculate mid as (low + high) // 2 and compare array[mid] with target

• If array[mid] is equal to target, return mid

• If array[mid] is less than target, update low to mid + 1

• If array[mid]...read more
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Q4. Wap for check your name is palindrome not
Ans. 
A program to check if a given name is a palindrome or not.
• Convert the name to lowercase to handle case-insensitivity

• Remove any spaces or special characters from the name

• Reverse the name and compare it with the original name to check for palindrome
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Q5. What is malloc and calloc function
Ans. 
malloc and calloc are functions in C programming used for dynamic memory allocation.
• malloc function is used to allocate a single block of memory of a specified size.

• calloc function is used to allocate multiple blocks of memory of a specified size, initialized to zero.

• Example: int *ptr = (int*)malloc(5 * sizeof(int));

• Example: int *ptr = (int*)calloc(5, sizeof(int));
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Q1. CCNA SWITCHING and switching
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Q2. Routing
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Q1. Manager round CCNA routing and switching
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Q1. What BGP OSPF VPN
Ans. 
BGP, OSPF, and VPN are all protocols used in networking to facilitate communication and secure data transmission.
• BGP (Border Gateway Protocol) is used to exchange routing information between different autonomous systems on the internet.

• OSPF (Open Shortest Path First) is an interior gateway protocol used to find the best path for routing within a single autonomous system.

• VPN (Virtual Private Network) is a technology tha...read more
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Q2. Smtp rstm vlan intervlan
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Q1. Ethereal channel
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Q2. OSPF BGP ethereal vpn erc
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Q1. What are the types of the breaks
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Q2. What is Java proggram
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Q1. BGP and ospf and vlan
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Q2. VSS and stacking switch
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Q1. BGP in depth ospf and vlan
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Q2. Vss and switch stacking switch routing
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Q1. What do you know about 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.

• There are different types of routing protocols such as RIP, OSPF, EIGRP, and BGP.

• Static routing involves manually ...read more
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Q2. What do you know about switching?
Ans. 
Switching is a networking technique used to forward data packets between devices on a computer network.
• Switching involves the process of receiving, analyzing, and forwarding data packets within a network.

• Switches operate at Layer 2 (Data Link Layer) of the OSI model.

• Switches use MAC addresses to determine the destination of data packets.

• Switches create separate collision domains and broadcast domains, improving network...read more
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