Network topology exhibit:
You are the administrator at ExamSheet.net. 
You use TCP/IP as the only protocol on your network. The network is configured as in the network topology exhibit. All existing computers and devices use 255.255.240.0 as the subnet mask. You install Windows 2000 Professional on a computer named ExamSheet2. You configure ExamSheet2 to have a TCP/IP address of 10.10.20.234, a default gateway of 10.10.20.1, a subnet mask of 255.255.0.0 and a WINS server address of 10.10.13.10. You cannot connect to 
shared resources on ExamSheetB by using its UNC name. You want ExamSheet2 to be able to connect to ExamSheetB.
What should you do? （）

You are the administrator of a Windows 2000 network. The network consists of a Windows 2000 domain named ExamSheet.net. You install Windows 2000 Professional on a new computer named ES1 and configure the TCP/IP settings to have a static IP address. You plan to join ES1 to the ExamSheet.net domain. You configure two DNS server addresses in the TCP/IP properties. The first DNS server address is for a DNS server hosted by your ISP, the second DNS server address is for a DNS server authoritative for the ExamSheet.net domain. When you attempt to join ES1 to the domain, you are unable to do so. You can successfully PINGthe IP address of each DNS server from ES1. You want ES1 to be able to join the tesking.com domain. 
What should you do? （）