The following network infrastructure diagram shows the CareGroups IT network. Assume that you are working in the Research East lab. What is the availability of the network you would use to access the West Campus LAN that includes Lowry Medical and Kennedy (assume Cisco 5500 class switches have 98% availability)?

EXHIBIT 6 The Existing Network at the Time of the Outage (loss of the east campus switch labeled ly030 triggered the event) Source: "CareGroup Network Outage." presentation by John D. Halamka, M D, November 25, 2002. (1) 5500 Switch (1) 5505 Switch (3) 5509 Switches (1) 5500 Switch (1)5505 Switch (1) 5509 Switch Renaissance Park (3) Ren Ctr ieT, ces, ice (1) Mount Aubarn (Remote (1) 5505 Switch switch-reh witch-rca 5300 3500 FEC f/23-248 12 EC fi/23-24 (1) Rescarch Enst ATMI 14 (18) 5505 Switches EC 421-24 FEC 3/21-24 5500 1 Baker (4) Deacoess (7) Lowry Medical 1>Maintenance 3) Palmer FEC 4121-24 FEC 3/21-24 (8) 5505 Switches switch-rcc East Campus CC West (Dual- 3) 109 Bmokline Ave homed wccwDO) 2) 2127 Burlington Si Researeh North switch- 5500 5500 5509 ATM S ATMW switch br203 PEC 100-4 FEC 8I-38 FEC 8.3-4 FEC WI-4 switch- spg06b +--- FEC R-2 12 FEC IN5-6 FECHVI 5500 switch- FEC BrI-2 FEC IV-2 12 switch ccelli18 spg06 5500 12 FEC R/1-2 switch- rob05 switch ccw00m4 (21) 5505 Switches (15) 5505 Switches (1) 5500 Switch (1) 3500XL 5500 5500 4 Dan 3) Eas 7) Feldberg 2) Finard 13) Kirstein (4) Reishas (5) Rose () Service 5) Stonichan (2) Yainens (13) Farr (12) CC East Campus 14/HIM 6) Kennedy 2) Lowry Medical (DMasco 124) CC West Campus CI) PACS (1) 5500 Switch ATM OC-3 155Mbps) over Sonet ATM OC-3 (155Mbps) dark fiber (21) 5505 Switches (2) 5509 Switches (1) 3500 XL Switch (PACS) Fast Etherchannel (4Mbps (37) 5505 Switches Fast Etherchannel (800 Mbps) Not Active