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Q191. Refer to the exhibit.
If you change the Spanning Tree Protocol from pvst to rapid-pvst, what is the effect on the interface Fa0/1 port state?
A. It transitions to the listening state, and then the forwarding state.
B. It transitions to the learning state and then the forwarding state.
C. It transitions to the blocking state, then the learning state, and then the forwarding state.
D. It transitions to the blocking state and then the forwarding state.
Answer: C
Explanation:
First, the port will transition to the blocking state, immediately upon the change, then it will transition to the new RSTP states of learning and forwarding.
Port States
There are only three port states left in RSTP that correspond to the three possible operational states. The 802.1D disabled, blocking, and listening states are merged into a unique 802.1w discarding state.
STP (802.1D) Port State
RSTP (802.1w) Port State
Is Port Included in Active Topology?
Is Port Learning MAC Addresses?
Disabled
Discarding
No
No
Blocking
Discarding
No
No
Listening
Discarding
Yes
No
Learning
Learning
Yes
Yes
Forwarding
Forwarding
Yes
Yes
Q192. DRAG DROP
Drag and drop the BGP attribute on the left to the correct category on the right.
Answer:
Q193. Which two statements about VPLS are true? (Choose two.)
A. Split horizon is used on PE devices to prevent loops.
B. Spanning tree is extended from CE to CE.
C. IP is used to switch Ethernet frames between sites.
D. PE routers dynamically associate to peers.
E. VPLS extends a Layer 2 broadcast domain.
Answer: A,E
Q194. Refer to the exhibit.
A PE router is configured with a policy map that contains the policer shown. The policy map is configured in the inbound direction of an interface facing a CE router. If the PE router
receives 12Mb/s of traffic with the CoS value set to 7 on a 100-Mb/s interface from the CE router, what value of MPLS EXP is set when this traffic goes through the policer shown?
A. 0
B. 6
C. 7
D. 8
Answer: B
Explanation:
Here, the policer is set where the conforming traffic is set to 10 percent of the 100 Mbps interface, so anything more than 10 Mbps will be placed into the exceeding traffic class, the traffic EXP value will be changed from 7 to 6 per the configuration.
Q195. Where is multicast traffic sent, when it is originated from a spoke site in a DMVPN phase 2 cloud?
A. spoke-spoke
B. nowhere, because multicast does not work over DMVPN
C. spoke-spoke and spoke-hub
D. spoke-hub
Answer: D
Explanation:
Spokes map multicasts to the static NBMA IP address of the hub, but hub maps multicast packets to the “dynamic” mappings – that is, the hub replicates multicast packets to all spokes registered via NHRP, so multicast traffic is sent to the hub from a spoke instead of to the other spokes directly.
Q196. Which is the way to enable the control word in an L2 VPN dynamic pseudowire connection on router R1?
A. R1(config)# pseudowire-class cw-enable
R1(config-pw-class)# encapsulation mpls
R1(config-pw-class)# set control-word
B. R1(config)# pseudowire-class cw-enable
R1(config-pw-class)# encapsulation mpls
R1(config-pw-class)# enable control-word
C. R1(config)# pseudowire-class cw-enable
R1(config-pw-class)# encapsulation mpls
R1(config-pw-class)# default control-word
D. R1(config)# pseudowire-class cw-enable
R1(config-pw-class)# encapsulation mpls
R1(config-pw-class)# control-word
Answer: D
Explanation:
The following example shows how to enable the control word in an AToM dynamic pseudowire connection:
Device(config)# pseudowire-class cw-enable
Device(config-pw-class)# encapsulation mpls
Device(config-pw-class)# control-word
Device(config-pw-class)# exit
Reference: http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mpls/command/mp-cr-book/mp-a1.html
Q197. Which two statements about VRRP are true? (Choose two.)
A. It is assigned multicast address 224.0.0.18.
B. The TTL for VRRP packets must be 255.
C. It is assigned multicast address 224.0.0.9.
D. Its IP protocol number is 115.
E. Three versions of the VRRP protocol have been defined.
F. It supports both MD5 and SHA1 authentication.
Answer: A,B
Q198. Refer to the exhibit.
IPv6 SLAAC clients that are connected to the router are unable to acquire IPv6 addresses. What is the reason for this issue?
A. Router advertisements are not sent by the router.
B. Duplicate address detection is disabled but is required on multiaccess networks.
C. The interface is configured to support DHCPv6 clients only.
D. The configured interface MTU is too low for IPv6 to be operational.
Answer: A
Q199. Refer to the exhibit.
Which statement is true?
A. BGP peer 10.1.2.3 is performing inbound filtering.
B. BGP peer 10.1.2.3 is a route reflector.
C. R1 is a route reflector, but BGP peer 10.1.2.3 is not a route reflector client.
D. R1 still needs to send an update to the BGP peer 10.1.2.3.
Answer: D
Explanation:
On R1 the routing table version (Tbl Ver) for 10.1.2.3 is 1, other routers have version 2, so it needs to send an update to the 10.1.2.3 peer.
Q200. Refer to the exhibit.
Which part of the joined group addresses list indicates that the interface has joined the EIGRP multicast group address?
A. FF02::1
B. FF02::1:FF00:200
C. FF02::A
D. FF02::2
Answer: C
Explanation:
FF02::A is an IPv6 link-local scope multicast addresses. This address is for all devices on a wire that want to "talk" EIGRP with one another.
Focusing specifically on FF02::A and how routers join it, we can see and say three things:
. Local: FF02::A is local to the wire.
. Join: Each device "joins" FF02::A by just "deciding to listen" to the IPv6 link-local scope multicast address FF02::A. Then, by extension, it listens to the corresponding MAC address for that multicast IPv6 address (33:33:00:00:00:0A).
. Common interest: As we can see, these varying groups have something in common that they would all like to hear about. For FF02::A, the common interest --the "connection" among the devices joining that group – is that they all want to listen to or participate in EIGRP.
Reference: http://www.networkcomputing.com/networking/understanding-ipv6-what-is-solicited-node-multicast/a/d-id/1315703
