单项选择题The OSPF RFC 3623 Graceful Restart feature allows you to configure IETF NSF in ultivendor networks. When using OSPF Graceful Restart, which mechanism is used tocontinue forwarding packets during a switchover?()

A.Reverse Path Forwarding
B.Hardware-based forwarding
C.UDP forwarding
D.Layer 2 Forwarding


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1.单项选择题You are configuring an 802.1Q trunk between a Layer 2 switch and a firewall. You read in the documentation that the best way to set up a trunk is to set the port as dynamic desirable. The trunk is not coming up. Which one of these options would be a valid explanation? ()

A.The firewall does not support Cisco Discovery Protocol. You should set the switchport trunk mode ON
B.The firewall does not support Cisco Discovery Protocol. You should set the switchport trunk mode to OFF
C.The firewall does not support Cisco Discovery Protocol. You should set the switchport trunk mode asauto.
D.The firewall does not support DTP. You should set the switchport trunk mode to ON

2.多项选择题Which two of the following are considered valid router IDs for EIGRPv6? ()

A.0.0.0.1
B.0.255.0.1
C.2001:DB8::1
D.2001:DB8:ABCD:FEEF::1

4.多项选择题Which two statements best describe spanning-tree BPDU processing for a blocking port?()

A.BPDUs that enter a blocking port are discarded.
B.BPDUs that enter a blocking port are processed.
C.Loopguard puts an interface into a loop-inconsistent state when BPDUs stop being received on a blocking port.
D.BPDUs are only processed on forwarding ports.

5.多项选择题Which two statements best describe CBWFQ?()

A.The CBWFQ scheduler provides a guaranteed minimum amount of bandwidth to each class.
B.CBWFQ services each class queue using a strict priority scheduler.
C.The class-default queue only supports WFQ.
D.Inside a class queue, processing is always FIFO, except for the class-default queue.

6.多项选择题Which two statements are true about the role of split horizon?()

A.It is a function used by routing protocols to install routes into routing table
B.It is a function that prevents the advertising of routes over an interface that the router is usingto reach a route
C.Its function is to help avoid routing loops.
D.It is a redistribution technique used by routing protocols

7.多项选择题As a network engineer, you responsibility is to install, configure, operate, and troubleshoot networks. In your company’s network, EIGRP is the routing protocol. You have just discovered that two routers restarted the neighbor relationship.Why? ()

A.An update packet with init flag set from a known, already established neighbor relationship was received by one of the routers.
B.The counters were deleted.
C.The ARP cache was removed.
D.The IP EIGRP neighbor relationship was cleared manually.

9.多项选择题Which two steps below should you perform on the hub router while configuring EIGRP routing over  DMVPN (mGRE tunnel)? ()

A.Set the NHRP hold time to match the EIGRP hold time
B.Add the enable eigrp stub command
C.Add the disable eigrp as-member split-horizon command
D.Add the disable eigrp as-member next-hop-self command

10.多项选择题Which two types of QoS functionality will be provided by Network-Based Application Recognition?()

A.NBAR provides the ability to configure MCQ; it is a mandatory MCQ component.
B.NBAR provides deep packet inspection and is used for advanced packet classification.
C.NBAR provides per-protocol packet and byte accounting functionality; it is used to track bandwidth utilization for all protocols described in the loaded PDLMs.
D.NBAR provides scheduling in an MQC policy map using an advanced algorithm.

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