The conversation appears to be a detailed technical discussion between two individuals, possibly a job interview or a meeting. The individual, referred to as "Preet Singh", is discussing their professional experience, technical skills, and knowledge in networking, including OSPF, BGP, IPsec, SSL tunnels, VPN tunnels, wireless networks, and SD-WAN.
Preet has worked on various projects involving network migration, configuration, and installation of switches, as well as the implementation of VSS on new 9500 switches. They have also managed firewalls, routing, and wireless parts in different teams. Preet has experience with various technologies, including Paul Alto, ESC checkpoint, and Nexus.
In terms of OSPF, Preet explains the neighbor states and the process of electing a Designated Router (DR) and Backup Designated Router (BDR). They also discuss the difference between LSF5 and LSS7, and how load balancing is achieved in EIGRP.
When talking about DHCP, Preet explains that by default, a PC will obtain an IP address automatically, and this process involves broadcast.
In the context of BGP, Preet discusses the path selection criteria, including the weight, local preference, locally reduced route, and shortest AS-path list. They also explain how BGP avoids loops in the network using the AS-path list.
Preet also discusses the differences between IPsec and SSL tunnels, and the ports that need to be opened on a firewall for each. They provide examples of when to use each, such as for remote access or site-to-site connections.
Regarding wireless networks, Preet explains the difference between 2.4 and 5 gigahertz networks, and the trade-off between speed and coverage area. They also discuss the use of heat maps or Kahu tools when designing a wireless network.
Finally, Preet talks about SD-WAN, explaining how it functions and how devices are provisioned within it. They discuss the benefits of zero-touch provisioning (ZTP) and how it's used in SD-WAN. They also discuss the use of B-series devices in SD-WAN, such as B-edge and B-smart.
Overall, this conversation provides a comprehensive overview of Preet's technical skills and experience in networking.
1. The individual named Preet Singh is a contractor working for Deloitte, with his last month being in June.
2. He has previously worked in a network operations team, managing firewalls, routing, switching, and wireless parts.
3. In his most recent role, he migrated switches from 6500 to 9500 and from 3850 to 90 practices model.
4. He has also installed switches in Iraq and configured AMOLED multi-size on Axis.
5. He has experience with Paul Aldo Cisco Asa, ESC checkpoint, Nexus, and Baraki in Tech Mahindra.
6. He joined Tech Mahindra in 2018 and left in 2020.
7. He has worked majorly on contracts and moved to Canada recently.
8. He has a good understanding of OSPF and BGP.
9. He knows the OSPF neighbor states and the BGP path selection criteria.
10. He understands how DHCP operates and the difference between IPsec and SSL tunnels.
11. He is familiar with the differences between 2.4 and 5 gigahertz Wi-Fi networks.
12. He has worked on SD-WAN and understands how it functions and how devices are provisioned inside it.
13. He is aware of the scenario where SD-WAN would be recommended to a client, such as when the company has 30 sites.
14. He knows that SD-WAN can be more cost-effective than MPLS when using internet links.
15. He suggests using SD-WAN for critical applications like Microsoft Teams, balancing voice and video calls.