Read the following case study and answer the questions that follow:
The company had been experiencing significant issues with its outdated computer network. Frequent downtime, slow connectivity, and security vulnerabilities were affecting its operations and customer satisfaction. To address these challenges, the company decided to undertake a comprehensive network upgrade. Google's network infrastructure had not been updated in over a decade. The existing setup consisted of old Ethernet cables, outdated routers, and limited security measures. As the company expanded, the network struggled to keep up with the increased demand. Employees often faced slow internet speeds, and the network's frequent outages disrupted daily operations, leading to customer complaints and lost sales. The IT department at Google proposed a network upgrade that included replacing old Ethernet cables with fiber-optic cables to significantly increase bandwidth and improve speed, implementing state-of-the-art firewalls to enhance network security and protect against cyber threats, establishing a VPN to provide secure remote access for employees working from different locations. It was further proposed that new routers, switches, and servers be installed to support the upgraded network. The proposed new infrastructure could easily scale to accommodate future growth and technological advancements.
Question
Discuss the significant challenges observed by Google Inc. during the network upgrade