Which of the following devices will allow a technician to measure the amount of data that is capable of traversing the network?（）

单项选择题Which of the following should be used to ensure that all packets are received by every connecteddevice?（）

A. Hub
B. Router
C. Switch
D. Firewall

单项选择题A network technician is concerned about the environmental effects of power consumption and heat from network resources Limited space is also a concern. Which of the following technologies should be implemented?（）

A. Circuit switching
B. Network address translation
C. Power over Ethernet
D. Virtual servers

单项选择题When each routing device has a consistent view of the network topology, the network is said to be:（）

A. fault tolerant
B. converged
C. autonomous
D. vectored

单项选择题Which of the following would MOST likely be used with multimode fiber?（）

A.10GBase-LR
B.10GBase-T
C.10GBase-ER
D.10GBase-SR

单项选择题A company has recently received a new ADSL backup Internet connection. Which of the followingwill MOST likely be used between the modem and the ISP?（）

A.PPPoE
B.RAS
C.IPSec
D.MSCHAP