What is the purpose of typing o/r 0x2142 during a password recover procedure on a 2500 series router?（）

单项选择题New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport.Which switching mode should be configured on the new switches to provide error-free transport to the network? （）

A. cut-through
B. fragment-free
C. frame-filtering
D. store-and-forward
E. 802.1q forwarding
F. VTP transparent mode

单项选择题The network 172.12.0.0 needs to be divided into subnets where each subnet has the capacity of 458 IP addresses.What would be the correct subnet mask to accomplish this division keeping the number of subnets at the maximum? （）

A.255.255.254.0
B.255.255.254.1
C.255.255.254.2
D.255.255.254.3

多项选择题A router with a serial interface will be used for an ISDN link.What other function group devices are required to complete the connection to the service provider? （）

A. TE1
B. TE2
C. TA
D. NT1
E. NT2

单项选择题A technician at TestKing needs to update the network documentation. One of the tasks includes documenting the name of the IOS image file of each router in the network.Which commands could be used to find this information?（）

A. Router# show protocols
B. Router# show version
C. Router# show image
D. Router# show IOS
E. Router# show flash

多项选择题Given a subnet mask of 255.255.255.224, which of the following addresses can be assigned to network hosts?（）

A.15.234.118.63
B.92.11.178.93
C.134.178.18.56
D.192.168.16.87
E.201.45.116.159
F.217.63.12.192