問答題what is RPF( Reverse Path Forwarding )?

您可能感興趣的試卷

你可能感興趣的試題

1.單項(xiàng)選擇題

Refer to the exhibit. In this network,R1 is configured not to perform autosummarization within EIGRP. What routes will R3 learn from R2 through EIGRP?()

A.172.30.1.0/24 and 10.1.2.0/24;EIGRP only performs autosummarization at the edge between two major networks
B.172.30.0.0/16 and 10.1.2.0/24;R2 will perform autosummarization,although R1 will not
C.Since R2 is configured without autosummarization,it will not propagate the 172.30.1.0/24 route
D.172.30.0.0/8 and 10.0.0.0/8

2.多項(xiàng)選擇題Which three port states are used by RSTP 802.1w?()

A.Listening
B.Learning
C.Forwarding
D.Blocking
E.Discarding
F.Disabled

4.單項(xiàng)選擇題The classic Spanning Tree Protocol (802.1D  1998) uses which sequence of variables to determine the best received BPDU?()

A.lowest root bridge id;lowest sender bridge id;lowest port id;lowest root path cost
B.lowest root path cost;lowest root bridge id;lowest sender bridge id;lowest sender port id
C.lowest root bridge id;lowest sender bridge id;lowest root path cost;lowest sender port id
D.lowest root bridge id;lowest root path cost;lowest sender bridge id;lowest sender port id

8.單項(xiàng)選擇題If a port configured with STP loop guard stops receiving BPDUs, the port will be put into which state?()

A.learning state
B.listening state
C.forwarding state
D.root-inconsistent state

9.多項(xiàng)選擇題Which two of these are used in the selection of a root bridge in a network utilizing Spanning Tree Protocol IEEE 802.1D?()

A.Designated Root Cost
B.bridge ID priority
C.max age
D.bridge ID MAC address
E.Designated Root Priority
F.forward delay

10.單項(xiàng)選擇題Which of these best describes the actions taken when a VTP message is received on a switch configured with the VTP mode "transparent"?()

A.VTP updates are ignored and forwarded out all ports
B.VTP updates are ignored and forwarded out trunks only
C.VTP updates are made to the VLAN database and are forwarded out trunks only
D.VTP updates are ignored and are not forwarded