問答題

what’s IOS command , you can see the output as below


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1.單項選擇題

Refer to the exhibit. Catalyst R is the root bridge for both VLAN 1 and VLAN 2. What is the easiest way to load-share traffic across both trunks and maintain redundancy in case a link fails,without using any type of EtherChannel link-bundling? ()

A.Increase the root bridge priority (increasing the numerical priority number) for VLAN 2 on Catalyst D so that port D2 becomes the root port on Catalyst D for VLAN 2
B.Decrease the port priority on R2 for VLAN 2 on Catalyst R so that port D1 will be blocked for VLAN 2 and port D2 will remain blocked for VLAN 1
C.Decrease the path cost on R2 on Catalyst R for VLAN 2 so that port D1 will be blocked for VLAN 2 and port D2 will remain blocked for VLAN 1
D.Increase the root bridge priority (decreasing the numerical priority number) for VLAN 2 onCatalyst R so that R2 becomes the root port on Catalyst D for VLAN 2

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

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

6.單項選擇題

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

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

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

9.單項選擇題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

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