McQ 8.Which of the following is true about the disadvantages of hub?

A. The hub cannot filter network traffic

B. The hub cannot extend the operational distance of the network

c. The hub cannot amplify the weakened sign

d. The hub cannot send a weakened signal on the network

9. With the wide application of microcomputers, a large number of microcomputers are connected to the wide area network through the local area network, and what kind of equipment is used to realize the interconnection between the local area network and the wide area network?

a. Telephone exchange

b. Bridge

c. Router

d. Ethernet switch