單項選擇題

our company has a main office and one branch office. All servers run Windows Server 2003 Service Pack 2 （SP2）. The main office has a third-party gateway device named Gateway1. 
Gateway1 is connected to the internal network and the Internet. Gateway1 supports IPSec. In the branch office， you have a server named Server1. You create an IPSec policy on Server1. You need to ensure that Server1 can establish an IPSec tunnel to Gateway1. 
What should you use to configure the IPSec policy？（）

A.an IP filter that allows only Internet Control Message Protocol （ICMP） traffic
B.an IP filter that allows only TCP traffic on port 1701
C.a pre-shared key for authentication
D.Kerberos authentication

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單項選擇題

Your company has a main office and two branch offices. The main office is located in Montreal. The branch offices are located in Seattle and Winnipeg. In the Montreal office， you have a server named Server1 that runs Windows Server 2003 Web Edition Service Pack 2 （SP2）. Server1 is configured as a VPN router. In the Seattle office， you have a VPN server named Server2. In the Winnipeg office， you have a VPN server named Server3. On Server1， you configure a L2TP/IPSec demand-dial interface for each branch office. On each branch office server， you create a single demand-dial interface that uses L2TP/IPSec to connect to the main office. All demand-dial interfaces are configured to use a pre-shared key. You discover that only one branch office can connect to the main office at a time. You need to ensure that both branch offices can connect to the main office simultaneously. 
What should you do？（）

A.Add two more demand-dial interfaces on Server1.
B.Install a computer certificate on Server1， Server2， and Server3.
C.Upgrade Server1 to Windows Server 2003 Standard Edition SP2.
D.Add an additional demand-dial interface on Server2 and Server3.
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