What could cause these symptoms?

Refer to the exhibit. A technician is investigating a problem with the network that is shown. The
router is a 2800 model and all switches are 2950 models. These symptoms have been observed:-
All of the user hosts can access the Internet.- None of the user hosts can access the server
located in VLAN 9.- All of the hosts can ping each other.What could cause these symptoms?

A.
Interface Fa0/4 on Switch3 is down.

B.
Switch2 is turned off.

C.
Interface Fa1/0 on the router is down.

D.
Interface S0/0 on the router is down.

E.
Trunking is not enabled on the link between Switch1 and Switch3.

F.
Interface Fa0/5 on Switch3 is down.

Explanation:
Since all user hosts have access to internet, link to router has to be up. Therefore, router interface
(Fa0/1 – believe it is labeled incorrectly on diagram as Fa1/0) must be up. Since all hosts can ping
each other, but none can get to VLAN 9 which is through single interface Fa0/4, this interface must
be down.
*: incorrect, S0/0 must be up if internet access available.
*: incorrect, Fa0/1 must be up if internet access (through router) available.
*: incorrect, would not prevent access to VLAN9 via other routes (i.e Fa0/7, Fa0/9, Fa0/4)
*: incorrect: Switch2 must be up if internet access (through switch and then router) available
*: incorrect: Disabled trunking on link between Switch 1 and Switch 3 would not prevent access to

VLAN9 via other routes