单项选择题 Your company has an IPv4 Ethernet network.A router named R1 connects your segment to the Internet. A router named R2 joins your subnet with a segment named Private1. The Private1 segment has a network address of 10.128.4.0/26. Your computer named WKS1 requires access to servers on the Private1 network. The WKS1 computer configuration is as shown in the following table. Network Addresses IPv4 Address 10.128.64.113 Subnet mask 255.255.252.0 Default Gateway 10.128.64.1 The routers are configured as shown in the following table. Router ID Addresses R1 interface 1 R1 interface 2 (To Internet) 10.128.64.1 131.107.108.37 R2 interface 1 R2 interface 2 10.128.64.10 10.128.4.1 WKS1 is unable to connect to the Private1 network by using the current configuration.You need to add a persistent route for the Private1 network to the routing table on WKS1. Which command should you run on WKS1？（）

多项选择题 Your network uses IPv4. You install a server that runs Windows Server 2008 R2 at a branch office. The server is configured with two network interfaces.You need to configure routing on the server at the branch office. Which two actions should you perform？（）

单项选择题 You have a DHCP server that runs Windows Server 2008 R2. You restore the DHCP database by using a recent backup.You need to prevent DHCP clients from receiving IP addresses that are currently in use on the network. What should you do？（）