Which version of spanning tree is recommended for the enterprise campus?（）

多项选择题Under which two circumstances should Spanning Tree Protocol be implemented?（）

A. to ensure a loop-free topology
B. to protect against user-side loops
C. when a VLAN spans access layer switches
D. for the most deterministic and highly available network topology
E. because of the risk of lost connectivity without Spanning Tree Protocol

单项选择题Refer to the exhibit. Which recommended practice is applicable?（）

A. If no core layer is deployed, the design will be easier to scale.
B. If no core layer is deployed, there will be fewer cabling requirements.
C. If no core layer is deployed, the distribution switches should not be fully meshed.
D. A dedicated campus core layer is not needed for connecting fewer than five buildings.
E. A dedicated campus core layer should be deployed for connecting three or more buildings.

单项选择题Which of these recommendations is most appropriate for the Cisco Campus Architecture?（）

A. Utilize Layer 3 switching.
B. Utilize software accelerated services.
C. Aggregate end users and support a feature-rich environment.
D. Perform packet manipulation and filtering at the core layer.
E. Use redundant point-to-point Layer 2 interconnections when there is a link or node failure.

单项选择题In a base e-Commerce module design, which routing statement is correct?（）

A. Routing is mostly static.
B. Hardcoded IP addresses are used to support failover.
C. Inbound servers use the CSM or ACE as the default gateway.
D. VLANs between the access layer switches are used for FHRP protocols.

单项选择题Lafeyette Productions is looking for a new ISP that has improved availability, load balancing, and catastrophe protection. Which type of ISP connectivity solution would be best?（）

A. single run
B. multi-homed
C. stub domain EBGP
D. direct BGP peering