單項選擇題A Cisco router is booting and has just completed the POST process. It is now ready to find and load an IOS  image. What function does the router perform next?()

A.It checks the configuration register.
B.It attempts to boot from a TFTP server.
C.It loads the first image file in flash memory.
D.It inspects the configuration file in NVRAM for boot instructions.


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1.多項選擇題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

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

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

3.多項選擇題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

5.單項選擇題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

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