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單項選擇題

In the implementation of VLSM techniques on a network using a single Class C IP address, which subnet mask is the most efficient for point-to-point serial links? （）

A.255.255.255.0
B.255.255.255.240
C.255.255.255.248
D.255.255.255.252
E.255.255.255.254

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單項選擇題

Which routing protocol by default uses bandwidth and delay as metrics?（）

A.RIP
B.BGP
C.OSPF
D.EIGRP

多項選擇題

A company is installing IP phones. The phones and office computers connect to the same device. To ensure maximum throughput for the phone data, the company needs to make sure that the phone traffic is on a different network from that of the office computer data traffic. What is the best network device to which to directly connect the phones and computers, and what technology should be implemented on this device? (Choose two.)（）

A.hub
B.router
C.switch
D.STP
E.subinterfaces
F.VLAN