单项选择题
A. Specify the IP address (172.19.1.1/32) as the destination address in the policy.
B. Specify the DNS entry (hostb.example.com.) as the destination address in the policy.
C. Create an address book entry in the Trust zone for the 172.19.1.1/32 prefix and reference this entry in the policy.
D. Create an address book entry in the Untrust zone for the 172.19.1.1/32 prefix and reference this entry in the policy.
多项选择题 Click the Exhibit button. host_a is in subnet_a and host_b is in subnet_b. Given the configuration shown in the exhibit, which statement is true about traffic from host_a to host_b?（）
多项选择题 Which two are characteristics of link-state routing protocols?（） (Choose two.)
多项选择题 Which two are components of the enhanced services software architecture?（） (Choose two.)