How many subnets are possible in an enterprise that has just been assigned an IPv6 prefix by itsISP?（）

单项选择题As an experienced network administrator, you are asked to troubleshoot a QoS problem. In which way might the Cisco NetFlow be helpful during the troubleshooting process?（）

A. NetFlow can discover the protocols in use and automatically adjust QoS traffic classes to meet policy-map requirements.
B. NetFlow records can be used to understand traffic profiles per class of service for data, voice, and video traffic.
C. NetFlow can be configured to identify voice and video traffic flows and place them into a low-latency queue for expedited processing.
D. NetFlow can report on the number of traffic matches for each class map in a configured QoS policy configuration.

单项选择题As a Network Engineer in a large-sized company, you have to master the knowledge of the Cisco mobility solution. Which of the following statement most appropriately identifies the characteristics of it?（）

A. It provides high-level integrated security from the wireless access point to the client and automatically encrypts voice and data in transit.
B. It allows you to centralize management, automate repetitive tasks, and provision IP services easily.
C. It centralizes your infrastructure and allows you to share resources more effectively by combining separate data centers into an interconnected SAN.
D. It authenticates users and devices so that it is impossible for a rogue device to be connected to the network.

单项选择题As an experienced Network Engineer, you are required to characterize an existing CIS network. In such a situation, what is the last step to take?（）

A. Perform a network audit.
B. Form an impression about the network.
C. Use traffic analysis to augment organizational input.
D. Prepare and add to the network description.

单项选择题Onboard USB 1.1 ports of the Cisco 800, 1800, 2800, and 3800 Series ISRs can be used to enable important security and storage capabilities.（）

A. True
B. False

多项选择题As a Cisco Network Engineer, you have to master the knowledge of the Cisco Storage Area Network solution for the data center. Which three of the following are features of it? （）(Choose three.)

A. It provides multiprotocol support.
B. It allows you to create separate networks on the VSAN.
C. It allows you to migrate to new technologies without a complete equipment upgrade.
D. It reduces cost and complexity by providing an easy transition to evolving technologies.