單項選擇題

While troubleshooting a network problem,a technician discovers that the current copy of the Cisco IOS is outdated and needs to be updated.Which of the following commands would the technician issue to replace the Cisco router IOS with the newer version?（）

A. Router#copy tftp flash
B. Router(config)#restore flash
C. Router(config)#repair flash
D. Router#copy flash run
E. Router>copy start flash
F. Router#copy start flash

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單項選擇題

A network administrator is planning a network installation for a large organization.The design requires 100 separate subnetworks,so the company has acquired a Class B network address.What subnet mask will provide the 100 subnetworks required, if 500 usable host addresses are required per subnet?（）

A. 255.255.240.0
B. 255.255.248.0
C. 255.255.252.0
D. 255.255.254.0
E. 255.255.255.0
F. 255.255.255.192

單項選擇題

An administrator must assign static IP addresses to the servers in a network.For network 192.168.20.24/29, the router is assigned the first usable host address while the sales server is given the last usable host address. Which of the following should be entered into the IP propertied box for the sales server?（）

A. IP address:192.168.20.14 Subnet Mask:255.255.255.248 Default Gateway:192.168.20.9
B. IP address:192.168.20.254 Subnet Mask:255.255.255.0 Default Gateway:192.168.20.1
C. IP address:192.168.20.30 Subnet Mask:255.255.255.248 Default Gateway:192.168.20.25
D. IP address:192.168.20.30 Subnet Mask:255.255.255.240 Default Gateway:192.168.20.17
E. IP address:192.168.20.30 Subnet Mask:255.255.255.240 Default Gateway:192.168.20.25

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While troubleshooting a network problem,a technician discovers that the current copy of the Cisco IOS is outdated and needs to be updated.Which of the following commands would the technician issue to replace the Cisco router IOS with the newer version?（）

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