Imagine an Enterprise Network, an Example of Campus Network, Which

Multiple Choice

Imagine an enterprise network, an example of campus network, which is composed of 4 buildings interconnected. Each building has its own LAN and the LANs are interconnected via 4 routers. Also, there is a WAN link that provides Internet access through an ISP.
The network administrator is going to create data VLANs on the network in Building 4 to put business departments on separate VLANs to improve security. With the VLANs, R4 will perform inter-VLAN routing. The PCs will belong to the following VLANs:
-- PC4 and PC6: Accounting VLAN
-- PC5 and File Server: Human Resource VLAN
-- PC7 and PC8: Marketing VLAN
Answer the following question.
-How many ports of the three switches in Building 4 should be configured as s trunk port?

A) 11
B) 5
C) 6
D) 7
E) 8