A company wants to connect two new offices to their main office.One building is 2 miles away from the headquarters and the other is 12 miles away. The angle between the buildings is 80 degrees. Which antenna is the best to use in this situation？  （）

A. If a port is connected to a foreign device make sure to disable CDP， DTP， RPR， PAgP， UDLP， and any other unnecessary protocols， and enable UplinkFast/BPDU guard on it.
B. Enable root guard feature to prevent a directly or indirectly connected STP-capable device from affecting the location of the root bridge.
C. Configure VTP domains appropriately or turn off VTP altogether to limit or prevent possible undesirable protocol interaction with regards to the network-wide VLAN configuration.
D. Set the native VLAN ID to match the port VLAN ID of any 802.1q trunk to prevent spoofing.
E. Disable all unused ports and place them in an unused VLAN to avoid unauthorized access.

A. Smaller companies are at less risk than larger enterprises， so their security needs are not as great.
B. Business strategy should directly relate to the security policy and budget.
C. The designated security expert should report to the IT department， since that is where thesolution will be implemented.
D. Security should be a continuous process.
E. Security solutions should come from multiple vendors to make it easier to coordinate security events from the point of origin.

A. Cisco lOS Matrix Navigator
B. Cisco Feature Navigator
C. Cisco lOS Package Planner
D. Cisco lOS Security Planner
E. Cisco Dynamic Configuration Tool