单项选择题
A.Increase the expires after setting to 4 days on the start of authority (SOA) record for the zone.
B.Increase the refresh interval setting 0 4 days on the start of authority (SOA) record for the zone.
C.Configure the zone aging / scavenging properties dialog box to enable scavenge state resource records, and set the refresh setting to 4 days.
D.Configure the zone aging / scavenging properties dialog box to enable scavenge state resource records, and set NO-refresh interval setting to 4 days.
单项选择题 Your network contains a server named Server1. Server1 runs Windows Server 2008 R2 and has a single network connection. The connection is configured to use a default gateway address of 10.0.0.1.The default gateway has a metric value of 100.You configure a second default gateway that uses an address of 10.0.0.2.You need to ensure that 10.0.0.2 is only used as the default gateway if 10.0.0.1 is unreachable. What should you do？（）
单项选择题 You have a DHCP serve that runs windows server 2008. The DHCP serve has two network connections named LAN1 and LAN2. You need to prevent the DHCP server from responding to DHCP client request on LAN2. The server must continue to respond to non-DHCP client requests on LAN2. What should you do?（）
单项选择题 Your network contains two DHCP servers named Server1 and Server2. Server1 and Server2 are located in the same subnet.You configure a split scope named Scope1 on the DHCP servers.You need to ensure that Server2 only responds to DHCP client requests if Server1 is unavailable.What should you modify？（）