单项选择题
A. antennas B. bridges C. access points D. routers
A. Cisco Express Catalyst 500 Series switches B. Cisco Catalyst 2900 Series switches C. Cisco Catalyst 3560 switches D. Cisco Catalyst 3700 Series switches E. Cisco Catalyst 4500 Series switches F. Cisco Catalyst 6500 Series switches
A. addition of strict firewalls B. limiting Internet access C. intelligence on foundation network devices D. increased use of network services