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Q1. Refer to the exhibit.
What will be the IP MTU of tunnel 0?
A. 1500
B. 1524
C. 1476
D. 1452
E. 1548
Answer: C
Explanation:
In the case of the GRE tunnel interface, the IP maximum transmission unit (MTU) is 24 bytes less than the IP MTU of the real outgoing interface. For an Ethernet outgoing interface that means the IP MTU on the tunnel interface would be 1500 minus 24, or 1476 bytes.
Reference: A spoke site that is connected to Router-A cannot reach a spoke site that is connected to Router-B, but both spoke sites can reach the hub. What is the likely cause of this issue http://www.cisco.com/c/en/us/support/docs/ip/generic-routing-encapsulation-gre/13725-56.html
Q2. Refer to the exhibit.
Which statement is true about a VPNv4 prefix that is present in the routing table of vrf one and is advertised from this router?
A. The prefix is advertised only with route target 100:1.
B. The prefix is advertised with route targets 100:1 and 100:2.
C. The prefix is advertised only with route target 100:3.
D. The prefix is not advertised.
E. The prefix is advertised with route targets 100:1, 100:2, and 100:3.
Answer: A
Explanation:
The route target used for prefix advertisements to other routers is defined on the route-target export command, which shows 100:1 in this case for VPNv4 routes.
Q3. Refer to the exhibit.
Which two options are effects of the given configuration? (Choose two.)
A. It sets the data export destination to 209.165.200.227 on UDP port 49152.
B. It enables Cisco Express Forwarding on interface FastEthernet0/0.
C. It configures the export process to include the BGP peer AS of the router gathering the data.
D. It enables NetFlow switching on interface FastEthernet0/0.
E. It sets the data export destination to 209.165.200.227 on TCP port 49152.
Answer: A,D
Explanation:
The “ip flow-export destination 209.165.200.227 49152” command specifies that the data export destination server is 209.165.200.227 using UDP port 49152.
The “ip route-cache flow” command under the fastethernet 0/0 interface enable netflow switching on that interface.
Q4. Which statement about OSPF loop prevention is true?
A. The discard route is generated automatically on the ABR to prevent routing loops.
B. The ASBR uses type 3 LSAs from non-backbone areas to prevent control-plane routing loops.
C. The ABR can filter type 3 LSPs to prevent routing loops.
D. The DN bit ignores LSA types 2, 3, and 5 to prevent routing loops.
Answer: A
Q5. Refer to the exhibit.
If the remaining configuration uses default values, what is the expected output of the show mls qos queue-set command?
A)
B)
C)
D)
A. Exhibit A
B. Exhibit B
C. Exhibit C
D. Exhibit D
Answer: A
Explanation:
mls qos queue-set output qset-idthreshold queue-id drop-threshold1 drop-threshold2 reserved-threshold maximum-threshold
Configure the WTD thresholds, guarantee the availability of buffers, and configure the maximum memory allocation for the queue-set (four egress queues per port).
By default, the WTD thresholds for queues 1, 3, and 4 are set to 100 percent. The thresholds for queue 2 are set to 200 percent. The reserved thresholds for queues 1, 2, 3,
and 4 are set to 50 percent. The maximum thresholds for all queues are set to 400 percent.
. For qset-id , enter the ID of the queue-set specified in Step 2. The range is 1 to 2.
. For queue-id , enter the specific queue in the queue-set on which the command is performed. The range is 1 to 4.
. For drop-threshold1 drop-threshold2 , specify the two WTD thresholds expressed as a percentage of the queue’s allocated memory. Th e range is 1 to 3200 percent.
. For reserved-threshold , enter the amount of memory to be guaranteed (reserved) for the queue expressed as a percentage of the allocated memory. The range is 1 to 100 percent.
. For maximum-threshold , enable a queue in the full condition to obtain more buffers than are reserved for it. This is the maximum memory the queue can have before the packets are dropped if the common pool is not empty. The range is 1 to 3200 percent
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/1 2-2_55_se/configuration/guide/3750xscg/swqos.html
Q6. How does MSTP provide backward compatibility with RSTP?
A. It uses the hop count variable as a TTL counter.
B. It transmits all spanning-tree information in one BPDU.
C. It supports up to 128 MSTI messages.
D. It encodes the MSTP-specific region information before the legacy RSTP BPDU.
Answer: D
Q7. Which two statements about RSTP and MSTP BPDUs are true? (Choose two.)
A. MSTP switches can detect boundary ports when they receive RSTP version 2 BPDUs.
B. MSTP switches can detect boundary ports when they receive RSTP version 1 BPDUs.
C. RSTP switches can process MSTP version 3 BPDUs.
D. When all boundary switches are running RSTP, MST sends only version 0 configuration BPDUs.
Answer: A,C
Explanation:
A switch running both MSTP and RSTP supports a built-in protocol migration mechanism that enables it to interoperate with legacy 802.1D switches. If this switch receives a legacy 802.1D configuration BPDU (a BPDU with the protocol version set to 0), it sends only 802.1D BPDUs on that port. An MST switch can also detect that a port is at the boundary of a region when it receives a legacy BPDU, an MST BPDU (version 3) associated with a different region, or an RST BPDU (version 2).
Reference: http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst2950/software/release/12-1_9_ea1/configuration/guide/scg/swmstp.html
Q8. How many address families can a single OSPFv3 instance support?
A. 1
B. 2
C. 5
D. 10
Answer: A
Q9. Refer to the exhibit.
For which reason could a BGP-speaking device in autonomous system 65534 be prevented from installing the given route in its BGP table?
A. The AS number of the BGP is specified in the given AS_PATH.
B. The origin of the given route is unknown.
C. BGP is designed only for publicly routed addresses.
D. The AS_PATH for the specified prefix exceeds the maximum number of ASs allowed.
E. BGP does not allow the AS number 65535.
Answer: A
Explanation:
BGP is considered to be a 'Path Vector' routing protocol rather than a distance vector routing protocol since it utilises a list of AS numbers to describe the path that a packet should take. This list is called the AS_PATH. Loops are prevented because if a BGP speaking router sees it's own AS in the AS_PATH of a route it rejects the route.
Q10. Which statement about LISP encapsulation in an EIGRP OTP implementation is true?
A. OTP uses LISP encapsulation for dynamic multipoint tunneling.
B. OTP maintains the LISP control plane.
C. OTP uses LISP encapsulation to obtain routes from neighbors.
D. LISP learns the next hop.
Answer: A
Q11. DRAG DROP
What is the correct order of the VSS initialization process? Drag the actions on the left to the correct initialization step on the right.
Answer:
Q12. DRAG DROP
Drag and drop the multiprotocol BGP feature on the left to the corresponding description on the right.
Answer:
Q13. Which statement about WAN Ethernet Services is true?
A. Rate-limiting can be configured per EVC.
B. Point-to-point processing and encapsulation are performed on the customer network.
C. Ethernet multipoint services function as a multipoint-to-multipoint VLAN-based connection.
D. UNIs can perform service multiplexing and all-in-one bundling.
Answer: A
Explanation:
The MEF has defined a set of bandwidth profiles that can be applied at the UNI or to an EVC. A bandwidth profile is a limit on the rate at which Ethernet frames can traverse the UNI or the EVC.
Reference: http://www.ciscopress.com/articles/article.asp?p=101367&seqNum=2
Q14. Refer to the exhibit.
At which location will the benefit of this configuration be observed?
A. on Router A and its upstream routers B. on Router A and its downstream routers
C. on Router A only
D. on Router A and all of its ARP neighbors
Answer: B
Explanation:
The following example shows how to configure the router (and downstream routers) to drop all options packets that enter the network: Router(config)# ip options drop
Reference: http://www.cisco.com/c/en/us/td/docs/ios/12_0s/feature/guide/sel_drop.html
Q15. Which statement describes the native VLAN concept in an ISL trunk?
A. It is the VLAN ID that is assigned to untagged packets.
B. It is the VLAN with highest priority.
C. It is the default VLAN for a trunk.
D. There is no native VLAN concept in an ISL trunk.
Answer: D
Explanation:
ISL has no native VLAN concept because it places the entire Ethernet frame in the payload of an ISL frame. Native VLANs is an 802.1Q specific concept