Cognizant Network Security Engineer Interview Questions and Answers

IKEv2 is more secure and efficient than IKEv1 for IPsec VPN.

• IKEv2 supports more secure encryption algorithms and has better resistance to attacks.

• IKEv2 has faster negotiation and rekeying times, improving performance.

• IKEv2 allows for more flexibility in terms of authentication methods.

• IKEv1 is still widely used and supported, but IKEv2 is recommended for new deployments.

• Both IKEv1 and IKEv2 are used to establish a secu...read more

Upgrading OS in distributed mode requires careful planning and execution.

• Ensure compatibility of new OS with existing hardware and software

• Create a backup of all important data before starting the upgrade process

• Test the upgrade process in a non-production environment first

• Schedule the upgrade during a maintenance window to minimize disruption

• Monitor the upgrade process closely and have a rollback plan in case of issue

VLAN stands for Virtual Local Area Network. It is a logical grouping of network devices that share the same broadcast domain.

• VLANs are used to improve network performance, security, and management.

• They allow network administrators to segment a large network into smaller, more manageable subnetworks.

• Each VLAN has its own broadcast domain, which reduces network congestion and improves performance.

• VLANs can also be used t...read more

STP stands for Spanning Tree Protocol. It is used to prevent loops in a network and ensure redundancy.

• STP is a protocol used in network switches to prevent loops in a network.

• It ensures that there is only one active path between any two network devices.

• STP blocks redundant paths to prevent loops and ensures network redundancy.

• STP is important for network stability and preventing broadcast storms.

• Examples of STP variant...read more