单项选择题Multi Protocol Label Switching (MPLS) is a data-carrying mechanism that belongs to the family of packet-switched networks. For an MPLS label, if the stack bit is set to1, which option is true?()

A.The stack bit will only be used when LDP is the label distribution protocol
B.The label is the last entry in the label stack.
C.The stack bit is for Cisco implementations exclusively and will only be used when TDP is the label distribution protocol.
D.The stack bit is reserved for future use.


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2.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

3.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

5.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.

6.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.

7.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

8.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.

10.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

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When a BGP router is not capable of understanding 4-byte AS numbers, it will see 4-byte AS numbers as a special, reserved, 2-byte AS number in the AS path. Which 2-byte AS number is this reserved one?()

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Multicast is being deployed in the network, and only ip pim sparse-dense mode has been configured on all interfaces in the network to support a new video streaming application. No other multicast configuration was applied anywhere in the network. Since enabling multicast, the network monitoring tools show periodic spikes in link utilization throughout the network, even in areas where the video application is not being used. What could be a possible cause?()

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