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Q421. Refer to the exhibit.
Switch DSW1 should share the same MST region with switch DSW2. Which statement is true?
A. Configure DSW1 with the same version number, and VLAN-to-instance mapping as shown on DSW2.
B. Configure DSW1 with the same region name, number, and VLAN-to-instance mapping as shown on DSW2.
C. DSW2 uses the VTP server mode to automatically propagate the MST configuration to DSW1.
D. DSW1 is in VTP client mode with a lower configuration revision number, therefore, it automatically inherits MST configuration from DSW2.
E. DSW1 automatically inherits MST configuration from DSW2 because they have the same domain name.
Answer: B
Q422. Refer to the exhibit.
Which option is the most likely explanation of the duplicate address message logged?
A. HSRP misconfiguration
B. a PC with IP of 10.10.1.1
C. spanning-tree-loop
D. a hardware problem
Answer: A
Q423. What is the VLAN ID range of VLANs that are eligible for pruning?
A. 2 through 1001
B. 1 through 1005
C. 1 through 4096
D. 2 through 1005
Answer: A
Q424. Refer to the exhibit.
Which option explains why the forwarding address is set to 0.0.0.0 instead of 110.100.1.1?
A. The interface Ethernet0/1 is in down state.
B. The next-hop ip address 110.100.1.1 is not directly attached to the redistributing router.
C. The next-hop interface (Ethernet0/1) is specified as part of the static route command; therefore, the forwarding address is always set to 0.0.0.0.
D. OSPF is not enabled on the interface Ethernet0/1.
Answer: D
Explanation:
From the output of the “show ip ospf database” command (although this command is not shown) we can conclude this is an ASBR (with Advertising Router is itself) and E0/1 is the ASBR’s next hop interface for other routers to reach network 192.168.10.0.
The Forwarding Address is determined by these conditions:
* The forwarding address is set to 0.0.0.0 if the ASBR redistributes routes and OSPF is not enabled on the next hop interface for those routes.
* These conditions set the forwarding address field to a non-zero address:
+ OSPF is enabled on the ASBR’s next hop interface AND
+ ASBR’s next hop interface is non-passive under OSPF AND
+ ASBR’s next hop interface is not point-to-point AND
+ ASBR’s next hop interface is not point-to-multipoint AND
+ ASBR’s next hop interface address falls under the network range specified in the router ospf command.
* Any other conditions besides these set the forwarding address to 0.0.0.0.
-> We can see E0/1 interface is not running OSPF because it does not belong to network 110.110.0.0 0.0.255.255 which is declared under OSPF process -> F.A address is set to 0.0.0.0.
Reference: http://www.cisco.com/c/en/us/support/docs/ip/open-shortest-path-first-ospf/13682-10.html
Q425. DRAG DROP
Drag and drop the events on the left to dispaly the correct sequence on the right when CoPP is enabled.
Answer:
Q426. Refer to the exhibit.
Which configuration is missing that would enable SSH access on a router that is running Cisco IOS XE Software?
A. int Gig0/0/0
management-interface
B. class-map ssh-class
match access-group protect-ssh
policy-map control-plane-in
class ssh-class
police 80000 conform transmit exceed drop
control-plane
service-policy input control-plane-in
C. control-plane host
management-interface GigabitEthernet0/0/0 allow ssh
D. interface Gig0/0/0
ip access-group protect-ssh in
Answer: C
Explanation:
The feature Management Plane Protection (MPP) allows an administrator to restrict on which interfaces management traffic can be received by a device. This allows the administrator additional control over a device and how the device is accessed. This example shows how to enable the MPP in order to only allow SSH and HTTPS on the GigabitEthernet0/1 interface:
!
control-plane host
management-interface GigabitEthernet 0/1 allow ssh https
!
Reference: http://www.cisco.com/c/en/us/support/docs/ip/access-lists/13608-21.html
Q427. Refer to the exhibit.
Why is the router out of memory?
A. The router is experiencing a BGP memory leak software defect.
B. The BGP peers have been up for too long.
C. The amount of BGP update traffic in the network is too high.
D. The router has insufficient memory due to the size of the BGP database.
Answer: D
Explanation:
Here we can see that this router is running out of memory due to the large size of the BGP routing database. In this case, this router is receiving over 200,000 routes from each of the 4 peers.
Q428. Which three capabilities are provided by MLD snooping? (Choose three.)
A. dynamic port learning
B. IPv6 multicast router discovery
C. user-configured ports age out automatically
D. a 5-minute aging timer
E. flooding control packets to the egress VLAN
F. a 60-second aging timer
Answer: A,B,D
Explanation:
Like IGMP snooping, MLD snooping performs multicast router discovery, with these characteristics:
. Ports configured by a user never age out.
. Dynamic port learning results from MLDv1 snooping queries and IPv6 PIMv2 packets.
. If there are multiple routers on the same Layer 2 interface, MLD snooping tracks a single multicast router on the port (the router that most recently sent a router control packet).
. Dynamic multicast router port aging is based on a default timer of 5 minutes; the multicast router is deleted from the router port list if no control packet is received on the port for 5 minutes.
. IPv6 multicast router discovery only takes place when MLD snooping is enabled on the switch.
Reference: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750/software/release/12-2_55_se/configuration/guide/scg3750/swv6mld.pdf
Q429. Which two BGP attributes are optional, non-transitive attributes? (Choose two.)
A. AS path
B. local preference
C. MED
D. weight
E. cluster list
Answer: C,E
Q430. DRAG DROP
Drag and drop the PPPoE packet type on the left to the corresponding description on the right.
Answer:
