As an experienced networking professional, you are asked to conduct a security audit in a local credit union`s network. The credit union curently has two locations, a headquarters office downtown and a branch office on the east side of town. The headquarters hs the following equipment: ten Windows XP workstation`s connected to a Windows server 2008 file server Ten Windows Vista Workstations, connected to a Windows Server 2008 file server One Windows Server 2008 RRAS server accessed by home workers after hours One Windows server 2008 print server One Linux database server One Linux Web server for members to check their account balances online One firewall where the network connects to the credit union`s ISP via a T3 dedicated link The east-side office has a five Windows XP workstations, connected to the headquarters office Windows server 2008 server through a T1 link. All tape backups are housed in a secure room in the headquarters office, with copies kept in a file cabinet at the east side office. At the headquarters, the servers reside in a locked room that admits authorized users with an electronic badge access system. Both locations have numerous security cameras, including cameras in the computer room and a backup tape storage vault at the headquarters. The manager also tells you that the credit union has a security policy that all employees are required to read and sign when the become employees. He believes that the network is very secure and ask you if he could do anything else to ensure that the network is safe from security breaches. In response, create a checklist of items on the network that should be evaluated for security. Sketch a network diagram for the credit union (remember to include connectivity devices necessary for the LAN and WAN connections). Describe any entry points (physical or data transmission related) or situations that constitute potential security risks. In addition, explain how the credit union manager could better train his employees to understand network security.