L/C is a letter addressed to the seller, written and signed by a bank acting on behalf of the buyer.（)

A.228.10.10.7

B. 229.11.10.7

C. 229.138.10.7

D. 229.138.10.8

E. 228.10.10.8

F. 228.10.138.7

A．Email address and IP address

B．MAC address and port address

C．MAC address and IP address

D．port number and IP address

帧中继环境中，在物理端口上，建立子接口的命令是（）

A.create

B.interface

C.encapsulation

D.ip address

ing to route traffic between the two data networks using EIGRP. The show command output shows that traffic will not flow between the networks. As a network consultant, you were asked to modify the configuration a nd certify the interoperability of the two networks. For traffic to flow from subnet 172.16.8.0/24 to the 172.16.16.0/24 subnet, which configuration change do you recommend？（）

A. Turn off autosummarization on routers N1 and B1.

B. Add IP summary addre sses to the Internet - pointing interfaces of routers N1 and B1.

C. Turn off autosummarization on routers N2 and B2.

D. Add wildcard masks to the network commands on routers N2 and B2.

A.2πLC

B.1/2πLC

C.1/2πLC

D.2π/LC

A.RC串并联网络的选频频率

B.LC谐振回路的谐振频率

C.1/LC

D.LC

选频网络采用LC回路的振荡器，称为LC振荡器。( )