our company has four DNS servers that run windows 2008.……

单项选择题Your network contains a DHCP server named DHCP1. You have a DHCP reservation for a computer named Computer1.You add a DNS server option to the reservation.You need to ensure that Computer1 immediately receives the new option.What should you do？（）

A. Run ipconfig.exe /renew.
B. Run ipconfig.exe /registerdns.
C. On DHCP1, recreate the reservation.
D. On DHCP1, delete the active lease for the reservation.

单项选择题You have a windows server 2008 compute that has an IP address of 172.16.45.9 21. The server is configured to use ipv6 addressing. You need to test IPv6 communication to a server that has an ip address of 172.16.40.18 21, what should you do from a command prompt?（）

A.Type ping 172.16.45.9::::.
B.Type ping ::9.45.16.172.
C.Type ping followed by the link-local address of the server.
D.Type ping followed by the site-local address of the server.

单项选择题Your network contains two Web servers named Web1 and Web2. Web1 hosts the companys corporate Web site. Web2 is a test server that contains a copy of the Web site.Users connect to Web1 by using the URL http: www.contoso.com.A Web developer named User1 plans to test updates to the Web site on Web2.You need to ensure that User1 connects to Web2 by using the URL http: www.contoso.com. The solution must ensure that all other computers connect to Web1.What should you do？（）

A. From User1s computer, create a record in the Hosts file.
B. From User1s computer, create a record in the Lmhosts file.
C. From a DNS server, create a new Host (A) resource record.
D. From a DNS server, create a new Alias (CNAME) resource record.

单项选择题our company has a main office and 15 branch offices. The company has a single active directory domain. All servers run windows server 2008.You need to ensure that the VPN connections between the office and the branch offices meet the following requirements:All data must be encrypted by using end-to-end encryption.The vpn connection must use computer-level authentication.User names and passwords cannot be used for authentication.What should do?（）

A.Configure an ipsec connection to use tunnel mode and preshared key authentication.
B.Configure a PPTP connection to use version 2 of the MS-CHAP v2 authentication.
C.Configure a L2TP/IPsec connection to use the EAP-TLS authentication.
D.Configure a L2TP/IPsec connection to use version 2 of the MS-CHAP v2 authentication.

单项选择题Your company has a main office and a branch office. The main office has a domain controller named DC1 that hosts a DNS primary zone. The branc office has a DNS server named SRV1 that hosts a DNS secondary zone. All client computers are configured to use their local server for DNS resolution. You change the IP address of an existing server named SRV2 in the main office. You need to ensure that SRV1 reflects the change immediately. What should you do?（）

A.Restart the DNS server service on DC1.
B.Run the dnscmd command by using the /zonerefresh option on DC1.
C.Run the dnscmd command by using the /zonerefresh option on SRV1.
D.Set the refresh interval to 10 minutes on the start of authority (SOA) record.