單項選擇題After applying a new ACL on a device, its CPU utilization rose significantly and many messages starting with "%SEC-6-IPACCESSLOG" appeared on the Syslog server. What can be done to resolve this situation?()

A.Increase memory allocation for ACLs.
B.Remove all entries from the ACL and use a single permit ip any any statement.
C.Remove the log keyword from each ACL entry.
D.Reboot the device after the ACL has been applied.


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1.單項選擇題Which feature would prevent guest users from gaining network access by unplugging an IP phone and connecting a laptop computer?()

A.IPSec VPN
B.SSL VPN
C.port security
D.port security with statically configured MAC addresses
E.private VLANs

3.單項選擇題While you are troubleshooting network performance issues, you notice that a switch is periodically flooding all unicast traffic. Further investigation reveals that periodically the switch is also having spikes in CPU utilization, causing the MAC address table to be flushed and relearned. What is the most likely cause of this issue?()

A.a routing protocol that is flooding updates
B.a flapping port that is generating BPDUs with the TCN bit set
C.STP is not running on the switch
D.a user that is downloading the output of the show-tech command
E.a corrupted switch CAM table

4.單項選擇題For a router connected to two ISPs for redundancy, using IPSLA and static routing, how would you configure uRPF on the uplink interface?()

A.ip verify unicast source reachable-via any
B.ip verify unicast reverse-path
C.ip verify unicast reverse-path loose
D.ip verify unicast reverse-path strict

5.多項選擇題Voice quality is bad due to high delay and jitter on a link. Which two actions will improve the quality  of voice calls?()

A.Increase the queue size of the voice class.
B.Guarantee bandwidth during congestion to the voice class with a bandwidth command.
C.Increase the tx-ring of the egress interface.
D.Implement LLQ for the voice class.
E.Decrease the rx-ring of the egress interface.
F.Decrease the queue size of the voice class.

6.單項選擇題What action will a BGP route reflector take when it receives a prefix marked with the community attribute NO ADVERTISE from a client peer?()

A.It will advertise the prefix to all other client peers and non-client peers.
B.It will not advertise the prefix to EBGP peers.
C.It will only advertise the prefix to all other IBGP peers.
D.It will not advertise the prefix to any peers.

7.多項選擇題Which two OSPF LSA types are new in OSPF version 3? ()

A.Link
B.NSSA external
C.Network link
D.Intra-area prefix
E.AS domain

9.多項選擇題Which two options does Cisco PfR use to control the entrance link selection with inbound  optimization?()

A.Prepend extra AS hops to the BGP prefix.
B.Advertise more specific BGP prefixes(longer mask).
C.Add(prepend)one or more communities to the prefix that is advertised by BGP.
D.Have BGP dampen the prefix.

10.多項選擇題Which two are effects of connecting a network segment that is running 802.1D to a network  segment that is running 802.1w?()

A.the entire network switches to 802.1D and generates BPDUs to determine root bridfe status.
B.A migration delay of three seconds occurs when the port that is connected to the 802.1D bridge comes up
C.The entire network reconverges and a unique root briddge for the 802.1D segment, and a root bridge for the 802.1W segment, is chosen
D.the first hop 802.1w switch that is connected to the 802.1D runs entirely in 802.1DCompatibility mode and converts the BPDUs to either 802.1D or 802.1W segments of the network
E.Classic 802.1D timers, Such as forward Delay and Max-age, will only be used as a backup, and will not be necessary if point-to-point links and edge prots are properly identified and set by the administrator.

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