多項(xiàng)選擇題What functions do routers perform in a network? (Choose two.)（）

A.packet switching
B.access layer security
C.path selection
D.VLAN membership assignment
E.bridging between LAN segments
F.microsegmentation of broadcast domains


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1.單項(xiàng)選擇題At which OSI layer is a logical path created between two host systems?（）

A.session
B.transport
C.network
D.data link
E.physical

2.多項(xiàng)選擇題What three pieces of information can be used in an extended access list to filter traffic? (Choose three.)（）

A.protocol
B.VLAN number
C.TCP or UDP port numbers
D.source switch port number
E.source IP address and destination IP address
F.source MAC address and destination MAC address

4.單項(xiàng)選擇題During startup, the router displays the following error message: boot: cannot open "flash:" What will the router do next?（）

A.Because of damaged flash memory， the router will fail the POST
B.It will attempt to locate the IOS from a TFTP server. If this fails， it will initiate the setup dialog.
C.It will attempt to locate the IOS from a TFTP server. If this fails， it will load a limited IOS from ROM
D.It will attempt to locate the configuration file from a TFTP server. If this fails， it will initiate the setup dialog.
E.It will attempt to locate the configuration file from a TFTP server. If this fails， it will load a limited configuration from ROM

5.單項(xiàng)選擇題What does the "Inside Global" address represent in the configuration of NAT?（）

A.the summarized address for all of the internal subnetted addresses
B.the MAC address of the router used by inside hosts to connect to the Internet
C.a globally unique， private IP address assigned to a host on the inside network
D.a registered address that represents an inside host to an outside network