單項(xiàng)選擇題The cisco ironport portfolio performs which service?（）

A.reduces the downtime that is as assocoated with spam,viruses,and blended threats that are delivered via email
B.defends the penmeter from malicious users and unauthorized traffic
C.provides A secure communication path through the internet
D.determines if A user or device is authorized to access A switch port


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1.多項(xiàng)選擇題Which three benefits are provided by the implementation of cisco c-series servers into A virtualized data center environment?（）

A.blade-based deployments
B.enterprise-focused design
C.infiniband networking
D.cost-effiective server
E.storage-intensive platform
F.extended memory sipport

3.單項(xiàng)選擇題In which area of the campus LAN are the user computers attached to the network?（）

A.core
B.access
C.distribution
D.aggregation

4.單項(xiàng)選擇題The cisco telepresence portfolio provides industry-leading video-conferencing solutions , how does the Cisco acquisition of tandberg strengthen its position？（）

A.it will give cisco products A strategic advantage by providing privileged access to the TIP
B.it enables cisco to eliminate product redundancies and improve margins
C.it provides cisco with its first high-end telepresence offering
D.it allows cisco to quickly broaden its product portfolio to better serve customer needs