單項(xiàng)選擇題下列哪一條命令用于配置DCC的鏈路處于斷開狀態(tài)后,重新建立鏈接等待的時(shí)間?()

A.dialer time ridle
B.dialer time rcompete
C.dialer time renable
D.dialer time rwait-carrier


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1.單項(xiàng)選擇題A network administrator must configure 200 switch ports to accept traffic from only the currently attached host devices. What would be the most efficient way to configure MAC-level security on all these ports?()

A.Visually verify the MAC addresses and then telnet to the switches to enter the switchport-port security mac-address command
B.Have end users e-mail their MAC addresses. Telnet to the switch to enter the switchport-port security mac-address command
C.Use the switchport port-security MAC address sticky command on all the switch ports that have end devices connected to them
D.Use show mac-address-table to determine the addresses that are associated with each port and then enter the commands on each switch for MAC address port-security

2.單項(xiàng)選擇題Which type of attack is characterized by a flood of packets that are requesting a TCP connection to a server()。

A.denial of service
B.brute force
C.reconnaissance
D.Trojan horse

3.單項(xiàng)選擇題V.24接口工作在同步方式下最高傳輸速率是()。

A.64000 bps
B.115200 bps
C.2048000 bps
D.4096000 bps

4.單項(xiàng)選擇題The network administrator is asked to configure 113 point-to-point links. Which IP addressing scheme best defines the address range and subnet mask that meet the requirement and waste the fewest subnet and host addresses?()

A.10.10.0.0/18 subnetted with mask 255.255.255.252
B.10.10.0.0/25 subnetted with mask 255.255.255.252
C.10.10.0.0/24 subnetted with mask 255.255.255.252
D.10.10.0.0/23 subnetted with mask 255.255.255.252
E.10.10.0.0/16 subnetted with mask 255.255.255.252

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