Velocis Systems Network Engineer Interview Questions, Process, and Tips

Q1. What is port security & how to manage.?
Ans. 
Port security is a feature that restricts access to a network switch port based on the MAC address of the device connected to it.
• Port security limits the number of MAC addresses allowed on a port.

• It can be configured to shut down the port if unauthorized devices are detected.

• Port security can be managed through configuration on the network switch.

• Examples of port security management include setting maximum number of al...read more
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Q2. What is LAN & WAN…?
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LAN stands for Local Area Network, used for connecting devices within a limited area. WAN stands for Wide Area Network, used for connecting devices over a large geographical area.
• LAN is typically used in homes, schools, and small businesses.

• WAN is used to connect multiple LANs over a larger area, such as connecting offices in different cities.

• LAN has higher data transfer speeds compared to WAN.

• LAN is usually owned, con...read more
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Q3. Different bitbeen BGP & MPLS..?
Ans. 
BGP is a routing protocol used to exchange routing information between different autonomous systems, while MPLS is a technology used to direct data packets through a network using labels.
• BGP (Border Gateway Protocol) is a path vector protocol used to exchange routing information between different autonomous systems.

• MPLS (Multiprotocol Label Switching) is a technology used to direct data packets through a network using ...read more
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Q4. How to manage Network issue…?
Ans. 
Network issues can be managed by identifying the problem, troubleshooting, implementing solutions, and monitoring for future issues.
• Identify the root cause of the network issue

• Troubleshoot the problem using network diagnostic tools

• Implement solutions such as reconfiguring network settings or replacing faulty hardware

• Monitor the network for any recurring issues
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Q5. How to communication to ISP…?
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Communication with ISP involves establishing a connection and troubleshooting network issues.
• Contact ISP's technical support for assistance

• Provide relevant information such as account details and network configurations

• Use tools like ping and traceroute to diagnose connectivity problems

• Escalate issues if necessary to ensure timely resolution
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Q6. How to check network strength…?
Ans. 
Network strength can be checked using various tools and techniques.
• Use network monitoring tools like Ping, Traceroute, and SNMP to check network performance.

• Check signal strength and quality for wireless networks using tools like NetSpot or inSSIDer.

• Analyze network traffic and bandwidth usage to identify any bottlenecks or issues.

• Perform speed tests using websites like Speedtest.net to measure download and upload speed...read more
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Q1. OSI layer and explanation
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The OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven abstraction layers.
• The OSI model consists of seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has specific functions and communicates with the corresponding layer on another device.

• For example, the Physical la...read more
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Q2. TCP and UDP explanation
Ans. 
TCP and UDP are both protocols used for transmitting data over the internet, but they have different characteristics.
• TCP (Transmission Control Protocol) is connection-oriented and ensures reliable delivery of data by using acknowledgments and retransmissions.

• UDP (User Datagram Protocol) is connectionless and does not guarantee delivery of data, making it faster but less reliable than TCP.

• TCP is commonly used for applic...read more
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Q1. Salary Discussion and joining kits
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Q1. What is HSRP. How HSRP work.
Ans. 
HSRP stands for Hot Standby Router Protocol. It is a Cisco proprietary redundancy protocol used to provide high availability for routing.
• HSRP allows for two or more routers to work together in a group, sharing a virtual IP address and providing redundancy in case one router fails.

• One router is elected as the active router, handling traffic for the virtual IP address, while the other routers in the group remain in stand...read more
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Q2. What do you know about STP.
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STP stands for Spanning Tree Protocol, used in network environments to prevent loops and ensure redundancy.
• STP is a network protocol used to prevent loops in Ethernet networks.

• It selects a single path for traffic within a network, blocking redundant paths to prevent loops.

• STP operates by exchanging messages between switches to detect loops and elect a root bridge.

• Common variants of STP include RSTP (Rapid Spanning Tree...read more
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Q3. What do you about Ether Channel
Ans. 
Ether Channel is a technology used in networking to combine multiple physical links into a single logical link for increased bandwidth and redundancy.
• Ether Channel is also known as Link Aggregation or Port Channel.

• It allows multiple physical links to be bundled together to form a single logical link.

• Ether Channel provides increased bandwidth and fault tolerance.

• It is commonly used in switch-to-switch or switch-to-serve...read more
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Q4. What do you know about RSTP
Ans. 
RSTP stands for Rapid Spanning Tree Protocol, a network protocol used to prevent loops in Ethernet networks.
• RSTP is an improvement over the original Spanning Tree Protocol (STP) and provides faster convergence in the network.

• It uses a variety of port roles such as root port, designated port, and alternate port to ensure loop-free topology.

• RSTP introduces new features like port roles, port states, and BPDU (Bridge Proto...read more
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Q1. Steps for upgrading firewall
Ans. 
Steps for upgrading firewall include planning, testing, implementing, and monitoring.
• 1. Plan the upgrade by identifying the current firewall model and version.

• 2. Backup the firewall configuration to ensure data safety.

• 3. Test the upgrade in a lab environment to identify any potential issues.

• 4. Implement the upgrade during a maintenance window to minimize downtime.

• 5. Monitor the firewall post-upgrade for any performance...read more
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Q2. Difference between http and https
Ans. 
HTTP is unsecured protocol while HTTPS is secured protocol using SSL/TLS encryption.
• HTTP stands for Hypertext Transfer Protocol, while HTTPS stands for Hypertext Transfer Protocol Secure.

• HTTP operates on port 80, while HTTPS operates on port 443.

• HTTP does not encrypt data, making it vulnerable to attacks like man-in-the-middle, while HTTPS encrypts data using SSL/TLS.

• HTTPS is indicated by a padlock icon in the browser'...read more
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