Which of the following features would BEST be used to optimize real-time voice and video chat?（）(Select TWO)

单项选择题1000BaseT has a MAXIMUM run distance of:（）

A. 25 meters (82 feet)
B. 100 meters (328 feet)
C. 500 meters (1640 feet)
D. 1000 meters (3280 feet)

单项选择题Which of the following features is essential in a firewall if it is to support RTP sessions?（）

A. Remote console
B. Statefulness
C. Address translation
D. Zones

单项选择题A layer 3 switch can move packets between subnets based on which of the following criteria?（）

A. 802.1q tag
B. Port
C. Application
D. IP address

单项选择题Which of the following is an invalid IPv4 address?（）

A.225.0.0.1
B.254.254.0.0
C.256.0.0.4
D.224.2.1.4

单项选择题An administrator needs to update a router configuration for a router that does not support SSH.Which of the following can be used to securely update the router configuration?（）

A.FTP
B.SNMPv2
C.TFTP
D.KTTPS