单项选择题
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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多项选择题
Whatfunctionsdoroutersperforminanetwork?(Choosetwo.)（）
A.packet switching
B.access layer security
C.path selection
D.VLAN membership assignment
E.bridging between LAN segments
F.microsegmentation of broadcast domains -
单项选择题
AtwhichOSIlayerisalogicalpathcreatedbetweentwohostsystems?（）
A.session
B.transport
C.network
D.data link
E.physical -
多项选择题
Whatthreepiecesofinformationcanbeusedinanextendedaccesslisttofiltertraffic?(Choosethree.)（）
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
