you have been hired by a manufactuing compnay that has its network in place for many years. they currently have $50$ computers connected to $10$ mbps hubs. youve been asked to upgrade the network. this long overdue upgrade is necessary becujase of poor network repsone time caused by a lot of collisioients and servers. how do you recommend upgrading this network? what interconnecting devices will you use nad what benefit will you get from using these devices