單項(xiàng)選擇題What is the OSPF default frequency,in seconds,at which a cisco router sends hello packets on a multi-access network?()

A. 10
B. 40
C. 30
D. 20


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1.單項(xiàng)選擇題Which dose the frame-relay interface-dlci command configure?()

A. remote DLCI on the main interface
B. local DLCI on the main interface
C. local DLCI on the subinterface
D. remote DLCI on the subinterface

2.單項(xiàng)選擇題Which command can be a router to verify the layer 3 path to a host?()

A. traceroute address
B. tracert address
C. ssh address
D. telnet address

4.單項(xiàng)選擇題A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29.which statement explains the reason for this issue?()

A. The address is a broadcast address
B. The Ehernet interface is faulty
C. VLSM-capable routing protocols must be enable first on the router.
D. This address is a network address.

5.單項(xiàng)選擇題What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?()

A. lowest port MAC address
B. port priority number and MAC address.
C. VTP revision number
D. highest port priority number.
E. path cost

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