單項選擇題

Refer to the exhibit. What type of issue does this error log indicate if the IP address in the error log is located off of the Router A WAN?（）

A.HSRP standby configuration error
B.HSRP burned-in address error
C.HSRP secondary address configuration error
D.this is not an HSRP problem，but rather an STP error or router or switch configuration issue


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2.多項選擇題

Refer to the exhibit. Users from the Engineering VLAN complain that every time Business VLAN users have a network connectivity issue， the Engineering VLAN users usually have problems experiencing slow response or network connectivity problems. After troubleshooting， an unauthorized switch 2 was found. This unauthorized switch has been a regular problem， assuming the root bridge function under the spanning-tree domain and causing the Engineering VLAN to be unstable. Which three of these actions could be suggested to fix the problem？（）

A.Upgrade Spanning Tree Protocol to Rapid Spanning Tree Protocol.
B.Change Business VLAN PCs to switch 1 and switch 4.
C.Force the root bridge to be switch 2， instead.
D.Adjust spanning-tree timers （max-age and forward-delay）.
E.Shut down all unused ports.
F.Use MSTP to separate the Engineering VLAN from the Business VLAN to optimize spanning-tree convergence time within each VLAN.

4.單項選擇題Which of these best identifies the types of prefixes a router running BGP will advertise to an EBGP peer？（）

A.prefixes received from any other BGP peer and prefixes locally originated via network statements or redistributed to BGP
B.all prefixes in its IP routing table
C.only prefixes received from EBGP peers and prefixes locally originated via network statements or redistributed
D.only prefixes received from EBGP peers and prefixes received from route reflectors
E.all prefixes in its routing table except the prefixes received from other EBGP peers
F.all prefixes in its routing table except the prefixes received from other IBGP peers